--- a/wp/wp-includes/kses.php Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-includes/kses.php Mon Oct 14 18:28:13 2019 +0200
@@ -28,22 +28,22 @@
*
* @package External
* @subpackage KSES
- *
*/
/**
- * You can override this in a plugin.
+ * Specifies the default allowable HTML tags.
*
- * The {@see 'wp_kses_allowed_html'} filter is more powerful and supplies context.
- *
- * `CUSTOM_TAGS` is not recommended and should be considered deprecated.
+ * Using `CUSTOM_TAGS` is not recommended and should be considered deprecated. The
+ * {@see 'wp_kses_allowed_html'} filter is more powerful and supplies context.
*
* @see wp_kses_allowed_html()
+ * @since 1.2.0
*
- * @since 1.2.0
+ * @var array[]|bool Array of default allowable HTML tags, or false to use the defaults.
*/
-if ( ! defined( 'CUSTOM_TAGS' ) )
+if ( ! defined( 'CUSTOM_TAGS' ) ) {
define( 'CUSTOM_TAGS', false );
+}
// Ensure that these variables are added to the global namespace
// (e.g. if using namespaces / autoload in the current PHP environment).
@@ -51,520 +51,725 @@
if ( ! CUSTOM_TAGS ) {
/**
- * Kses global for default allowable HTML tags.
+ * KSES global for default allowable HTML tags.
*
- * Can be override by using CUSTOM_TAGS constant.
+ * Can be overridden with the `CUSTOM_TAGS` constant.
*
- * @global array $allowedposttags
+ * @var array[] $allowedposttags Array of default allowable HTML tags.
* @since 2.0.0
*/
$allowedposttags = array(
- 'address' => array(),
- 'a' => array(
- 'href' => true,
- 'rel' => true,
- 'rev' => true,
- 'name' => true,
- 'target' => true,
+ 'address' => array(),
+ 'a' => array(
+ 'href' => true,
+ 'rel' => true,
+ 'rev' => true,
+ 'name' => true,
+ 'target' => true,
+ 'download' => array(
+ 'valueless' => 'y',
+ ),
),
- 'abbr' => array(),
- 'acronym' => array(),
- 'area' => array(
- 'alt' => true,
+ 'abbr' => array(),
+ 'acronym' => array(),
+ 'area' => array(
+ 'alt' => true,
'coords' => true,
- 'href' => true,
+ 'href' => true,
'nohref' => true,
- 'shape' => true,
+ 'shape' => true,
'target' => true,
),
- 'article' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'article' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'aside' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'aside' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'audio' => array(
+ 'audio' => array(
'autoplay' => true,
'controls' => true,
- 'loop' => true,
- 'muted' => true,
- 'preload' => true,
- 'src' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'preload' => true,
+ 'src' => true,
),
- 'b' => array(),
- 'bdo' => array(
+ 'b' => array(),
+ 'bdo' => array(
'dir' => true,
),
- 'big' => array(),
+ 'big' => array(),
'blockquote' => array(
- 'cite' => true,
- 'lang' => true,
+ 'cite' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'br' => array(),
- 'button' => array(
+ 'br' => array(),
+ 'button' => array(
'disabled' => true,
- 'name' => true,
- 'type' => true,
- 'value' => true,
+ 'name' => true,
+ 'type' => true,
+ 'value' => true,
),
- 'caption' => array(
+ 'caption' => array(
'align' => true,
),
- 'cite' => array(
- 'dir' => true,
+ 'cite' => array(
+ 'dir' => true,
'lang' => true,
),
- 'code' => array(),
- 'col' => array(
- 'align' => true,
- 'char' => true,
+ 'code' => array(),
+ 'col' => array(
+ 'align' => true,
+ 'char' => true,
'charoff' => true,
- 'span' => true,
- 'dir' => true,
- 'valign' => true,
- 'width' => true,
+ 'span' => true,
+ 'dir' => true,
+ 'valign' => true,
+ 'width' => true,
),
- 'colgroup' => array(
- 'align' => true,
- 'char' => true,
+ 'colgroup' => array(
+ 'align' => true,
+ 'char' => true,
'charoff' => true,
- 'span' => true,
- 'valign' => true,
- 'width' => true,
+ 'span' => true,
+ 'valign' => true,
+ 'width' => true,
),
- 'del' => array(
+ 'del' => array(
'datetime' => true,
),
- 'dd' => array(),
- 'dfn' => array(),
- 'details' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
- 'open' => true,
+ 'dd' => array(),
+ 'dfn' => array(),
+ 'details' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'open' => true,
'xml:lang' => true,
),
- 'div' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'div' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'dl' => array(),
- 'dt' => array(),
- 'em' => array(),
- 'fieldset' => array(),
- 'figure' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'dl' => array(),
+ 'dt' => array(),
+ 'em' => array(),
+ 'fieldset' => array(),
+ 'figure' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
'figcaption' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'font' => array(
+ 'font' => array(
'color' => true,
- 'face' => true,
- 'size' => true,
+ 'face' => true,
+ 'size' => true,
),
- 'footer' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'footer' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'form' => array(
- 'action' => true,
- 'accept' => true,
- 'accept-charset' => true,
- 'enctype' => true,
- 'method' => true,
- 'name' => true,
- 'target' => true,
+ 'h1' => array(
+ 'align' => true,
),
- 'h1' => array(
+ 'h2' => array(
'align' => true,
),
- 'h2' => array(
- 'align' => true,
- ),
- 'h3' => array(
+ 'h3' => array(
'align' => true,
),
- 'h4' => array(
+ 'h4' => array(
'align' => true,
),
- 'h5' => array(
+ 'h5' => array(
'align' => true,
),
- 'h6' => array(
+ 'h6' => array(
'align' => true,
),
- 'header' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'header' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'hgroup' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'hgroup' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'hr' => array(
- 'align' => true,
+ 'hr' => array(
+ 'align' => true,
'noshade' => true,
- 'size' => true,
- 'width' => true,
+ 'size' => true,
+ 'width' => true,
),
- 'i' => array(),
- 'img' => array(
- 'alt' => true,
- 'align' => true,
- 'border' => true,
- 'height' => true,
- 'hspace' => true,
+ 'i' => array(),
+ 'img' => array(
+ 'alt' => true,
+ 'align' => true,
+ 'border' => true,
+ 'height' => true,
+ 'hspace' => true,
'longdesc' => true,
- 'vspace' => true,
- 'src' => true,
- 'usemap' => true,
- 'width' => true,
+ 'vspace' => true,
+ 'src' => true,
+ 'usemap' => true,
+ 'width' => true,
),
- 'ins' => array(
+ 'ins' => array(
'datetime' => true,
- 'cite' => true,
+ 'cite' => true,
),
- 'kbd' => array(),
- 'label' => array(
+ 'kbd' => array(),
+ 'label' => array(
'for' => true,
),
- 'legend' => array(
+ 'legend' => array(
'align' => true,
),
- 'li' => array(
+ 'li' => array(
'align' => true,
'value' => true,
),
- 'map' => array(
+ 'map' => array(
'name' => true,
),
- 'mark' => array(),
- 'menu' => array(
+ 'mark' => array(),
+ 'menu' => array(
'type' => true,
),
- 'nav' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'nav' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'p' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'p' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'pre' => array(
+ 'pre' => array(
'width' => true,
),
- 'q' => array(
+ 'q' => array(
'cite' => true,
),
- 's' => array(),
- 'samp' => array(),
- 'span' => array(
- 'dir' => true,
- 'align' => true,
- 'lang' => true,
+ 's' => array(),
+ 'samp' => array(),
+ 'span' => array(
+ 'dir' => true,
+ 'align' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'section' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'section' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'small' => array(),
- 'strike' => array(),
- 'strong' => array(),
- 'sub' => array(),
- 'summary' => array(
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
+ 'small' => array(),
+ 'strike' => array(),
+ 'strong' => array(),
+ 'sub' => array(),
+ 'summary' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
'xml:lang' => true,
),
- 'sup' => array(),
- 'table' => array(
- 'align' => true,
- 'bgcolor' => true,
- 'border' => true,
+ 'sup' => array(),
+ 'table' => array(
+ 'align' => true,
+ 'bgcolor' => true,
+ 'border' => true,
'cellpadding' => true,
'cellspacing' => true,
- 'dir' => true,
- 'rules' => true,
- 'summary' => true,
- 'width' => true,
+ 'dir' => true,
+ 'rules' => true,
+ 'summary' => true,
+ 'width' => true,
),
- 'tbody' => array(
- 'align' => true,
- 'char' => true,
+ 'tbody' => array(
+ 'align' => true,
+ 'char' => true,
'charoff' => true,
- 'valign' => true,
+ 'valign' => true,
),
- 'td' => array(
- 'abbr' => true,
- 'align' => true,
- 'axis' => true,
+ 'td' => array(
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
'bgcolor' => true,
- 'char' => true,
+ 'char' => true,
'charoff' => true,
'colspan' => true,
- 'dir' => true,
+ 'dir' => true,
'headers' => true,
- 'height' => true,
- 'nowrap' => true,
+ 'height' => true,
+ 'nowrap' => true,
'rowspan' => true,
- 'scope' => true,
- 'valign' => true,
- 'width' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
),
- 'textarea' => array(
- 'cols' => true,
- 'rows' => true,
+ 'textarea' => array(
+ 'cols' => true,
+ 'rows' => true,
'disabled' => true,
- 'name' => true,
+ 'name' => true,
'readonly' => true,
),
- 'tfoot' => array(
- 'align' => true,
- 'char' => true,
+ 'tfoot' => array(
+ 'align' => true,
+ 'char' => true,
'charoff' => true,
- 'valign' => true,
+ 'valign' => true,
),
- 'th' => array(
- 'abbr' => true,
- 'align' => true,
- 'axis' => true,
+ 'th' => array(
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
'bgcolor' => true,
- 'char' => true,
+ 'char' => true,
'charoff' => true,
'colspan' => true,
'headers' => true,
- 'height' => true,
- 'nowrap' => true,
+ 'height' => true,
+ 'nowrap' => true,
'rowspan' => true,
- 'scope' => true,
- 'valign' => true,
- 'width' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
),
- 'thead' => array(
- 'align' => true,
- 'char' => true,
+ 'thead' => array(
+ 'align' => true,
+ 'char' => true,
'charoff' => true,
- 'valign' => true,
+ 'valign' => true,
),
- 'title' => array(),
- 'tr' => array(
- 'align' => true,
+ 'title' => array(),
+ 'tr' => array(
+ 'align' => true,
'bgcolor' => true,
- 'char' => true,
+ 'char' => true,
'charoff' => true,
- 'valign' => true,
+ 'valign' => true,
),
- 'track' => array(
+ 'track' => array(
'default' => true,
- 'kind' => true,
- 'label' => true,
- 'src' => true,
+ 'kind' => true,
+ 'label' => true,
+ 'src' => true,
'srclang' => true,
),
- 'tt' => array(),
- 'u' => array(),
- 'ul' => array(
+ 'tt' => array(),
+ 'u' => array(),
+ 'ul' => array(
'type' => true,
),
- 'ol' => array(
- 'start' => true,
- 'type' => true,
+ 'ol' => array(
+ 'start' => true,
+ 'type' => true,
'reversed' => true,
),
- 'var' => array(),
- 'video' => array(
+ 'var' => array(),
+ 'video' => array(
'autoplay' => true,
'controls' => true,
- 'height' => true,
- 'loop' => true,
- 'muted' => true,
- 'poster' => true,
- 'preload' => true,
- 'src' => true,
- 'width' => true,
+ 'height' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'poster' => true,
+ 'preload' => true,
+ 'src' => true,
+ 'width' => true,
),
);
/**
- * Kses allowed HTML elements.
- *
- * @global array $allowedtags
+ * @var array[] $allowedtags Array of KSES allowed HTML elements.
* @since 1.0.0
*/
$allowedtags = array(
- 'a' => array(
- 'href' => true,
+ 'a' => array(
+ 'href' => true,
'title' => true,
),
- 'abbr' => array(
+ 'abbr' => array(
'title' => true,
),
- 'acronym' => array(
+ 'acronym' => array(
'title' => true,
),
- 'b' => array(),
+ 'b' => array(),
'blockquote' => array(
'cite' => true,
),
- 'cite' => array(),
- 'code' => array(),
- 'del' => array(
+ 'cite' => array(),
+ 'code' => array(),
+ 'del' => array(
'datetime' => true,
),
- 'em' => array(),
- 'i' => array(),
- 'q' => array(
+ 'em' => array(),
+ 'i' => array(),
+ 'q' => array(
'cite' => true,
),
- 's' => array(),
- 'strike' => array(),
- 'strong' => array(),
+ 's' => array(),
+ 'strike' => array(),
+ 'strong' => array(),
);
+ /**
+ * @var string[] $allowedentitynames Array of KSES allowed HTML entitity names.
+ * @since 1.0.0
+ */
$allowedentitynames = array(
- 'nbsp', 'iexcl', 'cent', 'pound', 'curren', 'yen',
- 'brvbar', 'sect', 'uml', 'copy', 'ordf', 'laquo',
- 'not', 'shy', 'reg', 'macr', 'deg', 'plusmn',
- 'acute', 'micro', 'para', 'middot', 'cedil', 'ordm',
- 'raquo', 'iquest', 'Agrave', 'Aacute', 'Acirc', 'Atilde',
- 'Auml', 'Aring', 'AElig', 'Ccedil', 'Egrave', 'Eacute',
- 'Ecirc', 'Euml', 'Igrave', 'Iacute', 'Icirc', 'Iuml',
- 'ETH', 'Ntilde', 'Ograve', 'Oacute', 'Ocirc', 'Otilde',
- 'Ouml', 'times', 'Oslash', 'Ugrave', 'Uacute', 'Ucirc',
- 'Uuml', 'Yacute', 'THORN', 'szlig', 'agrave', 'aacute',
- 'acirc', 'atilde', 'auml', 'aring', 'aelig', 'ccedil',
- 'egrave', 'eacute', 'ecirc', 'euml', 'igrave', 'iacute',
- 'icirc', 'iuml', 'eth', 'ntilde', 'ograve', 'oacute',
- 'ocirc', 'otilde', 'ouml', 'divide', 'oslash', 'ugrave',
- 'uacute', 'ucirc', 'uuml', 'yacute', 'thorn', 'yuml',
- 'quot', 'amp', 'lt', 'gt', 'apos', 'OElig',
- 'oelig', 'Scaron', 'scaron', 'Yuml', 'circ', 'tilde',
- 'ensp', 'emsp', 'thinsp', 'zwnj', 'zwj', 'lrm',
- 'rlm', 'ndash', 'mdash', 'lsquo', 'rsquo', 'sbquo',
- 'ldquo', 'rdquo', 'bdquo', 'dagger', 'Dagger', 'permil',
- 'lsaquo', 'rsaquo', 'euro', 'fnof', 'Alpha', 'Beta',
- 'Gamma', 'Delta', 'Epsilon', 'Zeta', 'Eta', 'Theta',
- 'Iota', 'Kappa', 'Lambda', 'Mu', 'Nu', 'Xi',
- 'Omicron', 'Pi', 'Rho', 'Sigma', 'Tau', 'Upsilon',
- 'Phi', 'Chi', 'Psi', 'Omega', 'alpha', 'beta',
- 'gamma', 'delta', 'epsilon', 'zeta', 'eta', 'theta',
- 'iota', 'kappa', 'lambda', 'mu', 'nu', 'xi',
- 'omicron', 'pi', 'rho', 'sigmaf', 'sigma', 'tau',
- 'upsilon', 'phi', 'chi', 'psi', 'omega', 'thetasym',
- 'upsih', 'piv', 'bull', 'hellip', 'prime', 'Prime',
- 'oline', 'frasl', 'weierp', 'image', 'real', 'trade',
- 'alefsym', 'larr', 'uarr', 'rarr', 'darr', 'harr',
- 'crarr', 'lArr', 'uArr', 'rArr', 'dArr', 'hArr',
- 'forall', 'part', 'exist', 'empty', 'nabla', 'isin',
- 'notin', 'ni', 'prod', 'sum', 'minus', 'lowast',
- 'radic', 'prop', 'infin', 'ang', 'and', 'or',
- 'cap', 'cup', 'int', 'sim', 'cong', 'asymp',
- 'ne', 'equiv', 'le', 'ge', 'sub', 'sup',
- 'nsub', 'sube', 'supe', 'oplus', 'otimes', 'perp',
- 'sdot', 'lceil', 'rceil', 'lfloor', 'rfloor', 'lang',
- 'rang', 'loz', 'spades', 'clubs', 'hearts', 'diams',
- 'sup1', 'sup2', 'sup3', 'frac14', 'frac12', 'frac34',
+ 'nbsp',
+ 'iexcl',
+ 'cent',
+ 'pound',
+ 'curren',
+ 'yen',
+ 'brvbar',
+ 'sect',
+ 'uml',
+ 'copy',
+ 'ordf',
+ 'laquo',
+ 'not',
+ 'shy',
+ 'reg',
+ 'macr',
+ 'deg',
+ 'plusmn',
+ 'acute',
+ 'micro',
+ 'para',
+ 'middot',
+ 'cedil',
+ 'ordm',
+ 'raquo',
+ 'iquest',
+ 'Agrave',
+ 'Aacute',
+ 'Acirc',
+ 'Atilde',
+ 'Auml',
+ 'Aring',
+ 'AElig',
+ 'Ccedil',
+ 'Egrave',
+ 'Eacute',
+ 'Ecirc',
+ 'Euml',
+ 'Igrave',
+ 'Iacute',
+ 'Icirc',
+ 'Iuml',
+ 'ETH',
+ 'Ntilde',
+ 'Ograve',
+ 'Oacute',
+ 'Ocirc',
+ 'Otilde',
+ 'Ouml',
+ 'times',
+ 'Oslash',
+ 'Ugrave',
+ 'Uacute',
+ 'Ucirc',
+ 'Uuml',
+ 'Yacute',
+ 'THORN',
+ 'szlig',
+ 'agrave',
+ 'aacute',
+ 'acirc',
+ 'atilde',
+ 'auml',
+ 'aring',
+ 'aelig',
+ 'ccedil',
+ 'egrave',
+ 'eacute',
+ 'ecirc',
+ 'euml',
+ 'igrave',
+ 'iacute',
+ 'icirc',
+ 'iuml',
+ 'eth',
+ 'ntilde',
+ 'ograve',
+ 'oacute',
+ 'ocirc',
+ 'otilde',
+ 'ouml',
+ 'divide',
+ 'oslash',
+ 'ugrave',
+ 'uacute',
+ 'ucirc',
+ 'uuml',
+ 'yacute',
+ 'thorn',
+ 'yuml',
+ 'quot',
+ 'amp',
+ 'lt',
+ 'gt',
+ 'apos',
+ 'OElig',
+ 'oelig',
+ 'Scaron',
+ 'scaron',
+ 'Yuml',
+ 'circ',
+ 'tilde',
+ 'ensp',
+ 'emsp',
+ 'thinsp',
+ 'zwnj',
+ 'zwj',
+ 'lrm',
+ 'rlm',
+ 'ndash',
+ 'mdash',
+ 'lsquo',
+ 'rsquo',
+ 'sbquo',
+ 'ldquo',
+ 'rdquo',
+ 'bdquo',
+ 'dagger',
+ 'Dagger',
+ 'permil',
+ 'lsaquo',
+ 'rsaquo',
+ 'euro',
+ 'fnof',
+ 'Alpha',
+ 'Beta',
+ 'Gamma',
+ 'Delta',
+ 'Epsilon',
+ 'Zeta',
+ 'Eta',
+ 'Theta',
+ 'Iota',
+ 'Kappa',
+ 'Lambda',
+ 'Mu',
+ 'Nu',
+ 'Xi',
+ 'Omicron',
+ 'Pi',
+ 'Rho',
+ 'Sigma',
+ 'Tau',
+ 'Upsilon',
+ 'Phi',
+ 'Chi',
+ 'Psi',
+ 'Omega',
+ 'alpha',
+ 'beta',
+ 'gamma',
+ 'delta',
+ 'epsilon',
+ 'zeta',
+ 'eta',
+ 'theta',
+ 'iota',
+ 'kappa',
+ 'lambda',
+ 'mu',
+ 'nu',
+ 'xi',
+ 'omicron',
+ 'pi',
+ 'rho',
+ 'sigmaf',
+ 'sigma',
+ 'tau',
+ 'upsilon',
+ 'phi',
+ 'chi',
+ 'psi',
+ 'omega',
+ 'thetasym',
+ 'upsih',
+ 'piv',
+ 'bull',
+ 'hellip',
+ 'prime',
+ 'Prime',
+ 'oline',
+ 'frasl',
+ 'weierp',
+ 'image',
+ 'real',
+ 'trade',
+ 'alefsym',
+ 'larr',
+ 'uarr',
+ 'rarr',
+ 'darr',
+ 'harr',
+ 'crarr',
+ 'lArr',
+ 'uArr',
+ 'rArr',
+ 'dArr',
+ 'hArr',
+ 'forall',
+ 'part',
+ 'exist',
+ 'empty',
+ 'nabla',
+ 'isin',
+ 'notin',
+ 'ni',
+ 'prod',
+ 'sum',
+ 'minus',
+ 'lowast',
+ 'radic',
+ 'prop',
+ 'infin',
+ 'ang',
+ 'and',
+ 'or',
+ 'cap',
+ 'cup',
+ 'int',
+ 'sim',
+ 'cong',
+ 'asymp',
+ 'ne',
+ 'equiv',
+ 'le',
+ 'ge',
+ 'sub',
+ 'sup',
+ 'nsub',
+ 'sube',
+ 'supe',
+ 'oplus',
+ 'otimes',
+ 'perp',
+ 'sdot',
+ 'lceil',
+ 'rceil',
+ 'lfloor',
+ 'rfloor',
+ 'lang',
+ 'rang',
+ 'loz',
+ 'spades',
+ 'clubs',
+ 'hearts',
+ 'diams',
+ 'sup1',
+ 'sup2',
+ 'sup3',
+ 'frac14',
+ 'frac12',
+ 'frac34',
'there4',
);
$allowedposttags = array_map( '_wp_add_global_attributes', $allowedposttags );
} else {
- $allowedtags = wp_kses_array_lc( $allowedtags );
+ $allowedtags = wp_kses_array_lc( $allowedtags );
$allowedposttags = wp_kses_array_lc( $allowedposttags );
}
/**
- * Filters content and keeps only allowable HTML elements.
+ * Filters text content and strips out disallowed HTML.
*
* This function makes sure that only the allowed HTML element names, attribute
- * names and attribute values plus only sane HTML entities will occur in
- * $string. You have to remove any slashes from PHP's magic quotes before you
- * call this function.
+ * names, attribute values, and HTML entities will occur in the given text string.
*
- * The default allowed protocols are 'http', 'https', 'ftp', 'mailto', 'news',
- * 'irc', 'gopher', 'nntp', 'feed', 'telnet, 'mms', 'rtsp' and 'svn'. This
- * covers all common link protocols, except for 'javascript' which should not
- * be allowed for untrusted users.
+ * This function expects unslashed data.
+ *
+ * @see wp_kses_post() for specifically filtering post content and fields.
+ * @see wp_allowed_protocols() for the default allowed protocols in link URLs.
*
* @since 1.0.0
*
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Optional. Allowed protocol in links.
- * @return string Filtered content with only allowed HTML elements
+ * @param string $string Text content to filter.
+ * @param array[]|string $allowed_html An array of allowed HTML elements and attributes, or a
+ * context name such as 'post'.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
+ * @return string Filtered content containing only the allowed HTML.
*/
function wp_kses( $string, $allowed_html, $allowed_protocols = array() ) {
- if ( empty( $allowed_protocols ) )
+ if ( empty( $allowed_protocols ) ) {
$allowed_protocols = wp_allowed_protocols();
+ }
$string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
- $string = wp_kses_normalize_entities($string);
- $string = wp_kses_hook($string, $allowed_html, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
- return wp_kses_split($string, $allowed_html, $allowed_protocols);
+ $string = wp_kses_normalize_entities( $string );
+ $string = wp_kses_hook( $string, $allowed_html, $allowed_protocols );
+ return wp_kses_split( $string, $allowed_html, $allowed_protocols );
}
/**
- * Filters one attribute only and ensures its value is allowed.
+ * Filters one HTML attribute and ensures its value is allowed.
*
- * This function has the advantage of being more secure than esc_attr() and can
- * escape data in some situations where wp_kses() must strip the whole attribute.
+ * This function can escape data in some situations where `wp_kses()` must strip the whole attribute.
*
* @since 4.2.3
*
- * @param string $string The 'whole' attribute, including name and value.
- * @param string $element The element name to which the attribute belongs.
+ * @param string $string The 'whole' attribute, including name and value.
+ * @param string $element The HTML element name to which the attribute belongs.
* @return string Filtered attribute.
*/
function wp_kses_one_attr( $string, $element ) {
- $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
- $allowed_html = wp_kses_allowed_html( 'post' );
+ $uris = wp_kses_uri_attributes();
+ $allowed_html = wp_kses_allowed_html( 'post' );
$allowed_protocols = wp_allowed_protocols();
- $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
-
+ $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
+
// Preserve leading and trailing whitespace.
$matches = array();
- preg_match('/^\s*/', $string, $matches);
+ preg_match( '/^\s*/', $string, $matches );
$lead = $matches[0];
- preg_match('/\s*$/', $string, $matches);
+ preg_match( '/\s*$/', $string, $matches );
$trail = $matches[0];
if ( empty( $trail ) ) {
$string = substr( $string, strlen( $lead ) );
} else {
$string = substr( $string, strlen( $lead ), -strlen( $trail ) );
}
-
+
// Parse attribute name and value from input.
$split = preg_split( '/\s*=\s*/', $string, 2 );
- $name = $split[0];
+ $name = $split[0];
if ( count( $split ) == 2 ) {
$value = $split[1];
@@ -593,12 +798,12 @@
}
$string = "$name=$quote$value$quote";
- $vless = 'n';
+ $vless = 'n';
} else {
$value = '';
$vless = 'y';
}
-
+
// Sanitize attribute by name.
wp_kses_attr_check( $name, $value, $string, $vless, $element, $allowed_html );
@@ -607,30 +812,31 @@
}
/**
- * Return a list of allowed tags and attributes for a given context.
+ * Returns an array of allowed HTML tags and attributes for a given context.
*
* @since 3.5.0
+ * @since 5.0.1 `form` removed as allowable HTML tag.
*
* @global array $allowedposttags
* @global array $allowedtags
* @global array $allowedentitynames
*
- * @param string|array $context The context for which to retrieve tags.
- * Allowed values are post, strip, data, entities, or
- * the name of a field filter such as pre_user_description.
- * @return array List of allowed tags and their allowed attributes.
+ * @param string|array $context The context for which to retrieve tags. Allowed values are 'post',
+ * 'strip', 'data', 'entities', or the name of a field filter such as
+ * 'pre_user_description'.
+ * @return array Array of allowed HTML tags and their allowed attributes.
*/
function wp_kses_allowed_html( $context = '' ) {
global $allowedposttags, $allowedtags, $allowedentitynames;
if ( is_array( $context ) ) {
/**
- * Filters HTML elements allowed for a given context.
+ * Filters the HTML that is allowed for a given context.
*
* @since 3.5.0
*
- * @param array $context Context to judge allowed tags by.
- * @param string $context_type Context type (explicit).
+ * @param array[]|string $context Context to judge allowed tags by.
+ * @param string $context_type Context name.
*/
return apply_filters( 'wp_kses_allowed_html', $context, 'explicit' );
}
@@ -638,11 +844,31 @@
switch ( $context ) {
case 'post':
/** This filter is documented in wp-includes/kses.php */
- return apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context );
+ $tags = apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context );
+
+ // 5.0.1 removed the `<form>` tag, allow it if a filter is allowing it's sub-elements `<input>` or `<select>`.
+ if ( ! CUSTOM_TAGS && ! isset( $tags['form'] ) && ( isset( $tags['input'] ) || isset( $tags['select'] ) ) ) {
+ $tags = $allowedposttags;
+
+ $tags['form'] = array(
+ 'action' => true,
+ 'accept' => true,
+ 'accept-charset' => true,
+ 'enctype' => true,
+ 'method' => true,
+ 'name' => true,
+ 'target' => true,
+ );
+
+ /** This filter is documented in wp-includes/kses.php */
+ $tags = apply_filters( 'wp_kses_allowed_html', $tags, $context );
+ }
+
+ return $tags;
case 'user_description':
case 'pre_user_description':
- $tags = $allowedtags;
+ $tags = $allowedtags;
$tags['a']['rel'] = true;
/** This filter is documented in wp-includes/kses.php */
return apply_filters( 'wp_kses_allowed_html', $tags, $context );
@@ -653,7 +879,7 @@
case 'entities':
/** This filter is documented in wp-includes/kses.php */
- return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context);
+ return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context );
case 'data':
default:
@@ -663,16 +889,16 @@
}
/**
- * You add any kses hooks here.
+ * You add any KSES hooks here.
*
- * There is currently only one kses WordPress hook, {@see 'pre_kses'}, and it is called here.
+ * There is currently only one KSES WordPress hook, {@see 'pre_kses'}, and it is called here.
* All parameters are passed to the hooks and expected to receive a string.
*
* @since 1.0.0
*
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Allowed protocol in links
+ * @param string $string Content to filter through KSES.
+ * @param array[]|string $allowed_html List of allowed HTML elements.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
* @return string Filtered content through {@see 'pre_kses'} hook.
*/
function wp_kses_hook( $string, $allowed_html, $allowed_protocols ) {
@@ -681,19 +907,19 @@
*
* @since 2.3.0
*
- * @param string $string Content to run through kses.
- * @param array $allowed_html Allowed HTML elements.
- * @param array $allowed_protocols Allowed protocol in links.
+ * @param string $string Content to run through KSES.
+ * @param array[]|string $allowed_html Allowed HTML elements.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
*/
return apply_filters( 'pre_kses', $string, $allowed_html, $allowed_protocols );
}
/**
- * This function returns kses' version number.
+ * Returns the version number of KSES.
*
* @since 1.0.0
*
- * @return string KSES Version Number
+ * @return string KSES version number.
*/
function wp_kses_version() {
return '0.2.2';
@@ -702,30 +928,81 @@
/**
* Searches for HTML tags, no matter how malformed.
*
- * It also matches stray ">" characters.
+ * It also matches stray `>` characters.
*
* @since 1.0.0
*
* @global array $pass_allowed_html
* @global array $pass_allowed_protocols
*
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $string Content to filter.
+ * @param array $allowed_html Allowed HTML elements.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
* @return string Content with fixed HTML tags
*/
function wp_kses_split( $string, $allowed_html, $allowed_protocols ) {
global $pass_allowed_html, $pass_allowed_protocols;
- $pass_allowed_html = $allowed_html;
+ $pass_allowed_html = $allowed_html;
$pass_allowed_protocols = $allowed_protocols;
return preg_replace_callback( '%(<!--.*?(-->|$))|(<[^>]*(>|$)|>)%', '_wp_kses_split_callback', $string );
}
/**
- * Callback for wp_kses_split.
+ * Helper function listing HTML attributes containing a URL.
+ *
+ * This function returns a list of all HTML attributes that must contain
+ * a URL according to the HTML specification.
+ *
+ * This list includes URI attributes both allowed and disallowed by KSES.
+ *
+ * @link https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
+ *
+ * @since 5.0.1
+ *
+ * @return array HTML attributes that must include a URL.
+ */
+function wp_kses_uri_attributes() {
+ $uri_attributes = array(
+ 'action',
+ 'archive',
+ 'background',
+ 'cite',
+ 'classid',
+ 'codebase',
+ 'data',
+ 'formaction',
+ 'href',
+ 'icon',
+ 'longdesc',
+ 'manifest',
+ 'poster',
+ 'profile',
+ 'src',
+ 'usemap',
+ 'xmlns',
+ );
+
+ /**
+ * Filters the list of attributes that are required to contain a URL.
+ *
+ * Use this filter to add any `data-` attributes that are required to be
+ * validated as a URL.
+ *
+ * @since 5.0.1
+ *
+ * @param array $uri_attributes HTML attributes requiring validation as a URL.
+ */
+ $uri_attributes = apply_filters( 'wp_kses_uri_attributes', $uri_attributes );
+
+ return $uri_attributes;
+}
+
+/**
+ * Callback for `wp_kses_split()`.
*
* @since 3.1.0
* @access private
+ * @ignore
*
* @global array $pass_allowed_html
* @global array $pass_allowed_protocols
@@ -738,11 +1015,11 @@
}
/**
- * Callback for wp_kses_split for fixing malformed HTML tags.
+ * Callback for `wp_kses_split()` for fixing malformed HTML tags.
*
* This function does a lot of work. It rejects some very malformed things like
- * <:::>. It returns an empty string, if the element isn't allowed (look ma, no
- * strip_tags()!). Otherwise it splits the tag into an element and an attribute
+ * `<:::>`. It returns an empty string, if the element isn't allowed (look ma, no
+ * `strip_tags()`!). Otherwise it splits the tag into an element and an attribute
* list.
*
* After the tag is split into an element and an attribute list, it is run
@@ -750,52 +1027,60 @@
* completed, will be returned.
*
* @access private
+ * @ignore
* @since 1.0.0
*
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $string Content to filter.
+ * @param array $allowed_html Allowed HTML elements.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
* @return string Fixed HTML element
*/
-function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
- $string = wp_kses_stripslashes($string);
+function wp_kses_split2( $string, $allowed_html, $allowed_protocols ) {
+ $string = wp_kses_stripslashes( $string );
- if (substr($string, 0, 1) != '<')
+ // It matched a ">" character.
+ if ( substr( $string, 0, 1 ) != '<' ) {
return '>';
- // It matched a ">" character
+ }
+ // Allow HTML comments.
if ( '<!--' == substr( $string, 0, 4 ) ) {
- $string = str_replace( array('<!--', '-->'), '', $string );
- while ( $string != ($newstring = wp_kses($string, $allowed_html, $allowed_protocols)) )
+ $string = str_replace( array( '<!--', '-->' ), '', $string );
+ while ( $string != ( $newstring = wp_kses( $string, $allowed_html, $allowed_protocols ) ) ) {
$string = $newstring;
- if ( $string == '' )
+ }
+ if ( $string == '' ) {
return '';
+ }
// prevent multiple dashes in comments
- $string = preg_replace('/--+/', '-', $string);
+ $string = preg_replace( '/--+/', '-', $string );
// prevent three dashes closing a comment
- $string = preg_replace('/-$/', '', $string);
+ $string = preg_replace( '/-$/', '', $string );
return "<!--{$string}-->";
}
- // Allow HTML comments
- if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9-]+)([^>]*)>?$%', $string, $matches))
+ // It's seriously malformed.
+ if ( ! preg_match( '%^<\s*(/\s*)?([a-zA-Z0-9-]+)([^>]*)>?$%', $string, $matches ) ) {
return '';
- // It's seriously malformed
+ }
- $slash = trim($matches[1]);
- $elem = $matches[2];
+ $slash = trim( $matches[1] );
+ $elem = $matches[2];
$attrlist = $matches[3];
- if ( ! is_array( $allowed_html ) )
+ if ( ! is_array( $allowed_html ) ) {
$allowed_html = wp_kses_allowed_html( $allowed_html );
+ }
- if ( ! isset($allowed_html[strtolower($elem)]) )
+ // They are using a not allowed HTML element.
+ if ( ! isset( $allowed_html[ strtolower( $elem ) ] ) ) {
return '';
- // They are using a not allowed HTML element
+ }
- if ($slash != '')
+ // No attributes are allowed for closing elements.
+ if ( $slash != '' ) {
return "</$elem>";
- // No attributes are allowed for closing elements
+ }
return wp_kses_attr( $elem, $attrlist, $allowed_html, $allowed_protocols );
}
@@ -803,28 +1088,30 @@
/**
* Removes all attributes, if none are allowed for this element.
*
- * If some are allowed it calls wp_kses_hair() to split them further, and then
- * it builds up new HTML code from the data that kses_hair() returns. It also
- * removes "<" and ">" characters, if there are any left. One more thing it does
+ * If some are allowed it calls `wp_kses_hair()` to split them further, and then
+ * it builds up new HTML code from the data that `kses_hair()` returns. It also
+ * removes `<` and `>` characters, if there are any left. One more thing it does
* is to check if the tag has a closing XHTML slash, and if it does, it puts one
* in the returned code as well.
*
* @since 1.0.0
*
- * @param string $element HTML element/tag
- * @param string $attr HTML attributes from HTML element to closing HTML element tag
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Sanitized HTML element
+ * @param string $element HTML element/tag.
+ * @param string $attr HTML attributes from HTML element to closing HTML element tag.
+ * @param array $allowed_html Allowed HTML elements.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
+ * @return string Sanitized HTML element.
*/
-function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
- if ( ! is_array( $allowed_html ) )
+function wp_kses_attr( $element, $attr, $allowed_html, $allowed_protocols ) {
+ if ( ! is_array( $allowed_html ) ) {
$allowed_html = wp_kses_allowed_html( $allowed_html );
+ }
// Is there a closing XHTML slash at the end of the attributes?
$xhtml_slash = '';
- if (preg_match('%\s*/\s*$%', $attr))
+ if ( preg_match( '%\s*/\s*$%', $attr ) ) {
$xhtml_slash = ' /';
+ }
// Are any attributes allowed at all for this element?
$element_low = strtolower( $element );
@@ -833,43 +1120,62 @@
}
// Split it
- $attrarr = wp_kses_hair($attr, $allowed_protocols);
+ $attrarr = wp_kses_hair( $attr, $allowed_protocols );
// Go through $attrarr, and save the allowed attributes for this element
// in $attr2
$attr2 = '';
foreach ( $attrarr as $arreach ) {
if ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
- $attr2 .= ' '.$arreach['whole'];
+ $attr2 .= ' ' . $arreach['whole'];
}
}
// Remove any "<" or ">" characters
- $attr2 = preg_replace('/[<>]/', '', $attr2);
+ $attr2 = preg_replace( '/[<>]/', '', $attr2 );
return "<$element$attr2$xhtml_slash>";
}
/**
- * Determine whether an attribute is allowed.
+ * Determines whether an attribute is allowed.
*
* @since 4.2.3
+ * @since 5.0.0 Add support for `data-*` wildcard attributes.
*
- * @param string $name The attribute name. Returns empty string when not allowed.
- * @param string $value The attribute value. Returns a filtered value.
- * @param string $whole The name=value input. Returns filtered input.
- * @param string $vless 'y' when attribute like "enabled", otherwise 'n'.
- * @param string $element The name of the element to which this attribute belongs.
- * @param array $allowed_html The full list of allowed elements and attributes.
- * @return bool Is the attribute allowed?
+ * @param string $name The attribute name. Passed by reference. Returns empty string when not allowed.
+ * @param string $value The attribute value. Passed by reference. Returns a filtered value.
+ * @param string $whole The `name=value` input. Passed by reference. Returns filtered input.
+ * @param string $vless Whether the attribute is valueless. Use 'y' or 'n'.
+ * @param string $element The name of the element to which this attribute belongs.
+ * @param array $allowed_html The full list of allowed elements and attributes.
+ * @return bool Whether or not the attribute is allowed.
*/
function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowed_html ) {
- $allowed_attr = $allowed_html[strtolower( $element )];
+ $allowed_attr = $allowed_html[ strtolower( $element ) ];
$name_low = strtolower( $name );
- if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
- $name = $value = $whole = '';
- return false;
+ if ( ! isset( $allowed_attr[ $name_low ] ) || '' == $allowed_attr[ $name_low ] ) {
+ /*
+ * Allow `data-*` attributes.
+ *
+ * When specifying `$allowed_html`, the attribute name should be set as
+ * `data-*` (not to be mixed with the HTML 4.0 `data` attribute, see
+ * https://www.w3.org/TR/html40/struct/objects.html#adef-data).
+ *
+ * Note: the attribute name should only contain `A-Za-z0-9_-` chars,
+ * double hyphens `--` are not accepted by WordPress.
+ */
+ if ( strpos( $name_low, 'data-' ) === 0 && ! empty( $allowed_attr['data-*'] ) && preg_match( '/^data(?:-[a-z0-9_]+)+$/', $name_low, $match ) ) {
+ /*
+ * Add the whole attribute name to the allowed attributes and set any restrictions
+ * for the `data-*` attribute values for the current element.
+ */
+ $allowed_attr[ $match[0] ] = $allowed_attr['data-*'];
+ } else {
+ $name = $value = $whole = '';
+ return false;
+ }
}
if ( 'style' == $name_low ) {
@@ -884,9 +1190,9 @@
$value = $new_value;
}
- if ( is_array( $allowed_attr[$name_low] ) ) {
+ if ( is_array( $allowed_attr[ $name_low ] ) ) {
// there are some checks
- foreach ( $allowed_attr[$name_low] as $currkey => $currval ) {
+ foreach ( $allowed_attr[ $name_low ] as $currkey => $currval ) {
if ( ! wp_kses_check_attr_val( $value, $vless, $currkey, $currval ) ) {
$name = $value = $whole = '';
return false;
@@ -906,122 +1212,142 @@
* or apostrophes around them, to make it easier to produce HTML code that will
* conform to W3C's HTML specification. It will also remove bad URL protocols
* from attribute values. It also reduces duplicate attributes by using the
- * attribute defined first (foo='bar' foo='baz' will result in foo='bar').
+ * attribute defined first (`foo='bar' foo='baz'` will result in `foo='bar'`).
*
* @since 1.0.0
*
- * @param string $attr Attribute list from HTML element to closing HTML element tag
- * @param array $allowed_protocols Allowed protocols to keep
- * @return array List of attributes after parsing
+ * @param string $attr Attribute list from HTML element to closing HTML element tag.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
+ * @return array[] Array of attribute information after parsing.
*/
-function wp_kses_hair($attr, $allowed_protocols) {
- $attrarr = array();
- $mode = 0;
+function wp_kses_hair( $attr, $allowed_protocols ) {
+ $attrarr = array();
+ $mode = 0;
$attrname = '';
- $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
+ $uris = wp_kses_uri_attributes();
// Loop through the whole attribute list
- while (strlen($attr) != 0) {
+ while ( strlen( $attr ) != 0 ) {
$working = 0; // Was the last operation successful?
- switch ($mode) {
- case 0 : // attribute name, href for instance
+ switch ( $mode ) {
+ case 0:
+ if ( preg_match( '/^([-a-zA-Z:]+)/', $attr, $match ) ) {
+ $attrname = $match[1];
+ $working = $mode = 1;
+ $attr = preg_replace( '/^[-a-zA-Z:]+/', '', $attr );
+ }
+
+ break;
- if ( preg_match('/^([-a-zA-Z:]+)/', $attr, $match ) ) {
- $attrname = $match[1];
- $working = $mode = 1;
- $attr = preg_replace( '/^[-a-zA-Z:]+/', '', $attr );
+ case 1:
+ if ( preg_match( '/^\s*=\s*/', $attr ) ) { // equals sign
+ $working = 1;
+ $mode = 2;
+ $attr = preg_replace( '/^\s*=\s*/', '', $attr );
+ break;
+ }
+
+ if ( preg_match( '/^\s+/', $attr ) ) { // valueless
+ $working = 1;
+ $mode = 0;
+ if ( false === array_key_exists( $attrname, $attrarr ) ) {
+ $attrarr[ $attrname ] = array(
+ 'name' => $attrname,
+ 'value' => '',
+ 'whole' => $attrname,
+ 'vless' => 'y',
+ );
+ }
+ $attr = preg_replace( '/^\s+/', '', $attr );
}
break;
- case 1 : // equals sign or valueless ("selected")
+ case 2:
+ if ( preg_match( '%^"([^"]*)"(\s+|/?$)%', $attr, $match ) ) {
+ // "value"
+ $thisval = $match[1];
+ if ( in_array( strtolower( $attrname ), $uris ) ) {
+ $thisval = wp_kses_bad_protocol( $thisval, $allowed_protocols );
+ }
- if (preg_match('/^\s*=\s*/', $attr)) // equals sign
- {
+ if ( false === array_key_exists( $attrname, $attrarr ) ) {
+ $attrarr[ $attrname ] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname=\"$thisval\"",
+ 'vless' => 'n',
+ );
+ }
$working = 1;
- $mode = 2;
- $attr = preg_replace('/^\s*=\s*/', '', $attr);
+ $mode = 0;
+ $attr = preg_replace( '/^"[^"]*"(\s+|$)/', '', $attr );
break;
}
- if (preg_match('/^\s+/', $attr)) // valueless
- {
- $working = 1;
- $mode = 0;
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+ if ( preg_match( "%^'([^']*)'(\s+|/?$)%", $attr, $match ) ) {
+ // 'value'
+ $thisval = $match[1];
+ if ( in_array( strtolower( $attrname ), $uris ) ) {
+ $thisval = wp_kses_bad_protocol( $thisval, $allowed_protocols );
}
- $attr = preg_replace('/^\s+/', '', $attr);
- }
-
- break;
- case 2 : // attribute value, a URL after href= for instance
-
- if (preg_match('%^"([^"]*)"(\s+|/?$)%', $attr, $match))
- // "value"
- {
- $thisval = $match[1];
- if ( in_array(strtolower($attrname), $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
-
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
+ if ( false === array_key_exists( $attrname, $attrarr ) ) {
+ $attrarr[ $attrname ] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname='$thisval'",
+ 'vless' => 'n',
+ );
}
$working = 1;
- $mode = 0;
- $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
+ $mode = 0;
+ $attr = preg_replace( "/^'[^']*'(\s+|$)/", '', $attr );
break;
}
- if (preg_match("%^'([^']*)'(\s+|/?$)%", $attr, $match))
- // 'value'
- {
+ if ( preg_match( "%^([^\s\"']+)(\s+|/?$)%", $attr, $match ) ) {
+ // value
$thisval = $match[1];
- if ( in_array(strtolower($attrname), $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
-
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
+ if ( in_array( strtolower( $attrname ), $uris ) ) {
+ $thisval = wp_kses_bad_protocol( $thisval, $allowed_protocols );
}
- $working = 1;
- $mode = 0;
- $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
- break;
- }
- if (preg_match("%^([^\s\"']+)(\s+|/?$)%", $attr, $match))
- // value
- {
- $thisval = $match[1];
- if ( in_array(strtolower($attrname), $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
-
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
+ if ( false === array_key_exists( $attrname, $attrarr ) ) {
+ $attrarr[ $attrname ] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname=\"$thisval\"",
+ 'vless' => 'n',
+ );
}
// We add quotes to conform to W3C's HTML spec.
$working = 1;
- $mode = 0;
- $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
+ $mode = 0;
+ $attr = preg_replace( "%^[^\s\"']+(\s+|$)%", '', $attr );
}
break;
} // switch
- if ($working == 0) // not well formed, remove and try again
- {
- $attr = wp_kses_html_error($attr);
+ if ( $working == 0 ) { // not well formed, remove and try again
+ $attr = wp_kses_html_error( $attr );
$mode = 0;
}
} // while
- if ($mode == 1 && false === array_key_exists($attrname, $attrarr))
+ if ( $mode == 1 && false === array_key_exists( $attrname, $attrarr ) ) {
// special case, for when the attribute list ends with a valueless
// attribute like "selected"
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+ $attrarr[ $attrname ] = array(
+ 'name' => $attrname,
+ 'value' => '',
+ 'whole' => $attrname,
+ 'vless' => 'y',
+ );
+ }
return $attrarr;
}
@@ -1031,24 +1357,24 @@
*
* Does not modify input. May return "evil" output.
*
- * Based on wp_kses_split2() and wp_kses_attr()
+ * Based on `wp_kses_split2()` and `wp_kses_attr()`.
*
* @since 4.2.3
*
- * @param string $element HTML element/tag
- * @return array|bool List of attributes found in $element. Returns false on failure.
+ * @param string $element HTML element.
+ * @return array|bool List of attributes found in the element. Returns false on failure.
*/
function wp_kses_attr_parse( $element ) {
- $valid = preg_match('%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches);
+ $valid = preg_match( '%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches );
if ( 1 !== $valid ) {
return false;
}
- $begin = $matches[1];
- $slash = $matches[2];
+ $begin = $matches[1];
+ $slash = $matches[2];
$elname = $matches[3];
- $attr = $matches[4];
- $end = $matches[5];
+ $attr = $matches[4];
+ $end = $matches[5];
if ( '' !== $slash ) {
// Closing elements do not get parsed.
@@ -1058,11 +1384,11 @@
// Is there a closing XHTML slash at the end of the attributes?
if ( 1 === preg_match( '%\s*/\s*$%', $attr, $matches ) ) {
$xhtml_slash = $matches[0];
- $attr = substr( $attr, 0, -strlen( $xhtml_slash ) );
+ $attr = substr( $attr, 0, -strlen( $xhtml_slash ) );
} else {
$xhtml_slash = '';
}
-
+
// Split it
$attrarr = wp_kses_hair_parse( $attr );
if ( false === $attrarr ) {
@@ -1072,7 +1398,7 @@
// Make sure all input is returned by adding front and back matter.
array_unshift( $attrarr, $begin . $slash . $elname );
array_push( $attrarr, $xhtml_slash . $end );
-
+
return $attrarr;
}
@@ -1082,11 +1408,11 @@
* Does not modify input. May return "evil" output.
* In case of unexpected input, returns false instead of stripping things.
*
- * Based on wp_kses_hair() but does not return a multi-dimensional array.
+ * Based on `wp_kses_hair()` but does not return a multi-dimensional array.
*
* @since 4.2.3
*
- * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @param string $attr Attribute list from HTML element to closing HTML element tag.
* @return array|bool List of attributes found in $attr. Returns false on failure.
*/
function wp_kses_hair_parse( $attr ) {
@@ -1094,8 +1420,9 @@
return array();
}
+ // phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
$regex =
- '(?:'
+ '(?:'
. '[-a-zA-Z:]+' // Attribute name.
. '|'
. '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
@@ -1114,6 +1441,7 @@
. '(?:\s|$)' // If attribute has no value, space is required.
. ')'
. '\s*'; // Trailing space is optional except as mentioned above.
+ // phpcs:enable
// Although it is possible to reduce this procedure to a single regexp,
// we must run that regexp twice to get exactly the expected result.
@@ -1132,69 +1460,76 @@
/**
* Performs different checks for attribute values.
*
- * The currently implemented checks are "maxlen", "minlen", "maxval", "minval"
+ * The currently implemented checks are "maxlen", "minlen", "maxval", "minval",
* and "valueless".
*
* @since 1.0.0
*
- * @param string $value Attribute value
- * @param string $vless Whether the value is valueless. Use 'y' or 'n'
+ * @param string $value Attribute value.
+ * @param string $vless Whether the attribute is valueless. Use 'y' or 'n'.
* @param string $checkname What $checkvalue is checking for.
- * @param mixed $checkvalue What constraint the value should pass
- * @return bool Whether check passes
+ * @param mixed $checkvalue What constraint the value should pass.
+ * @return bool Whether check passes.
*/
-function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
+function wp_kses_check_attr_val( $value, $vless, $checkname, $checkvalue ) {
$ok = true;
- switch (strtolower($checkname)) {
- case 'maxlen' :
+ switch ( strtolower( $checkname ) ) {
+ case 'maxlen':
// The maxlen check makes sure that the attribute value has a length not
// greater than the given value. This can be used to avoid Buffer Overflows
// in WWW clients and various Internet servers.
- if (strlen($value) > $checkvalue)
+ if ( strlen( $value ) > $checkvalue ) {
$ok = false;
+ }
break;
- case 'minlen' :
+ case 'minlen':
// The minlen check makes sure that the attribute value has a length not
// smaller than the given value.
- if (strlen($value) < $checkvalue)
+ if ( strlen( $value ) < $checkvalue ) {
$ok = false;
+ }
break;
- case 'maxval' :
+ case 'maxval':
// The maxval check does two things: it checks that the attribute value is
// an integer from 0 and up, without an excessive amount of zeroes or
// whitespace (to avoid Buffer Overflows). It also checks that the attribute
// value is not greater than the given value.
// This check can be used to avoid Denial of Service attacks.
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ if ( ! preg_match( '/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value ) ) {
$ok = false;
- if ($value > $checkvalue)
+ }
+ if ( $value > $checkvalue ) {
$ok = false;
+ }
break;
- case 'minval' :
+ case 'minval':
// The minval check makes sure that the attribute value is a positive integer,
// and that it is not smaller than the given value.
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ if ( ! preg_match( '/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value ) ) {
$ok = false;
- if ($value < $checkvalue)
+ }
+ if ( $value < $checkvalue ) {
$ok = false;
+ }
break;
- case 'valueless' :
+ case 'valueless':
// The valueless check makes sure if the attribute has a value
- // (like <a href="blah">) or not (<option selected>). If the given value
+ // (like `<a href="blah">`) or not (`<option selected>`). If the given value
// is a "y" or a "Y", the attribute must not have a value.
- // If the given value is an "n" or an "N", the attribute must have one.
+ // If the given value is an "n" or an "N", the attribute must have a value.
- if (strtolower($checkvalue) != $vless)
+ if ( strtolower( $checkvalue ) != $vless ) {
$ok = false;
+ }
break;
} // switch
@@ -1202,44 +1537,45 @@
}
/**
- * Sanitize string from bad protocols.
+ * Sanitizes a string and removed disallowed URL protocols.
*
- * This function removes all non-allowed protocols from the beginning of
- * $string. It ignores whitespace and the case of the letters, and it does
- * understand HTML entities. It does its work in a while loop, so it won't be
- * fooled by a string like "javascript:javascript:alert(57)".
+ * This function removes all non-allowed protocols from the beginning of the
+ * string. It ignores whitespace and the case of the letters, and it does
+ * understand HTML entities. It does its work recursively, so it won't be
+ * fooled by a string like `javascript:javascript:alert(57)`.
*
* @since 1.0.0
*
- * @param string $string Content to filter bad protocols from
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Filtered content
+ * @param string $string Content to filter bad protocols from.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
+ * @return string Filtered content.
*/
-function wp_kses_bad_protocol($string, $allowed_protocols) {
- $string = wp_kses_no_null($string);
+function wp_kses_bad_protocol( $string, $allowed_protocols ) {
+ $string = wp_kses_no_null( $string );
$iterations = 0;
do {
$original_string = $string;
- $string = wp_kses_bad_protocol_once($string, $allowed_protocols);
+ $string = wp_kses_bad_protocol_once( $string, $allowed_protocols );
} while ( $original_string != $string && ++$iterations < 6 );
- if ( $original_string != $string )
+ if ( $original_string != $string ) {
return '';
+ }
return $string;
}
/**
- * Removes any invalid control characters in $string.
+ * Removes any invalid control characters in a text string.
*
- * Also removes any instance of the '\0' string.
+ * Also removes any instance of the `\0` string.
*
* @since 1.0.0
*
- * @param string $string
- * @param array $options Set 'slash_zero' => 'keep' when '\0' is allowed. Default is 'remove'.
- * @return string
+ * @param string $string Content to filter null characters from.
+ * @param array $options Set 'slash_zero' => 'keep' when '\0' is allowed. Default is 'remove'.
+ * @return string Filtered content.
*/
function wp_kses_no_null( $string, $options = null ) {
if ( ! isset( $options['slash_zero'] ) ) {
@@ -1257,45 +1593,44 @@
/**
* Strips slashes from in front of quotes.
*
- * This function changes the character sequence \" to just ". It leaves all
- * other slashes alone. It's really weird, but the quoting from
- * preg_replace(//e) seems to require this.
+ * This function changes the character sequence `\"` to just `"`. It leaves all other
+ * slashes alone. The quoting from `preg_replace(//e)` requires this.
*
* @since 1.0.0
*
- * @param string $string String to strip slashes
- * @return string Fixed string with quoted slashes
+ * @param string $string String to strip slashes from.
+ * @return string Fixed string with quoted slashes.
*/
-function wp_kses_stripslashes($string) {
- return preg_replace('%\\\\"%', '"', $string);
+function wp_kses_stripslashes( $string ) {
+ return preg_replace( '%\\\\"%', '"', $string );
}
/**
- * Goes through an array and changes the keys to all lower case.
+ * Converts the keys of an array to lowercase.
*
* @since 1.0.0
*
- * @param array $inarray Unfiltered array
- * @return array Fixed array with all lowercase keys
+ * @param array $inarray Unfiltered array.
+ * @return array Fixed array with all lowercase keys.
*/
-function wp_kses_array_lc($inarray) {
- $outarray = array ();
+function wp_kses_array_lc( $inarray ) {
+ $outarray = array();
- foreach ( (array) $inarray as $inkey => $inval) {
- $outkey = strtolower($inkey);
- $outarray[$outkey] = array ();
+ foreach ( (array) $inarray as $inkey => $inval ) {
+ $outkey = strtolower( $inkey );
+ $outarray[ $outkey ] = array();
- foreach ( (array) $inval as $inkey2 => $inval2) {
- $outkey2 = strtolower($inkey2);
- $outarray[$outkey][$outkey2] = $inval2;
- } // foreach $inval
- } // foreach $inarray
+ foreach ( (array) $inval as $inkey2 => $inval2 ) {
+ $outkey2 = strtolower( $inkey2 );
+ $outarray[ $outkey ][ $outkey2 ] = $inval2;
+ }
+ }
return $outarray;
}
/**
- * Handles parsing errors in wp_kses_hair().
+ * Handles parsing errors in `wp_kses_hair()`.
*
* The general plan is to remove everything to and including some whitespace,
* but it deals with quotes and apostrophes as well.
@@ -1305,33 +1640,36 @@
* @param string $string
* @return string
*/
-function wp_kses_html_error($string) {
- return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
+function wp_kses_html_error( $string ) {
+ return preg_replace( '/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string );
}
/**
* Sanitizes content from bad protocols and other characters.
*
- * This function searches for URL protocols at the beginning of $string, while
+ * This function searches for URL protocols at the beginning of the string, while
* handling whitespace and HTML entities.
*
* @since 1.0.0
*
- * @param string $string Content to check for bad protocols
- * @param string $allowed_protocols Allowed protocols
- * @return string Sanitized content
+ * @param string $string Content to check for bad protocols.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
+ * @return string Sanitized content.
*/
-function wp_kses_bad_protocol_once($string, $allowed_protocols, $count = 1 ) {
+function wp_kses_bad_protocol_once( $string, $allowed_protocols, $count = 1 ) {
+ $string = preg_replace( '/(�*58(?![;0-9])|�*3a(?![;a-f0-9]))/i', '$1;', $string );
$string2 = preg_split( '/:|�*58;|�*3a;/i', $string, 2 );
- if ( isset($string2[1]) && ! preg_match('%/\?%', $string2[0]) ) {
- $string = trim( $string2[1] );
+ if ( isset( $string2[1] ) && ! preg_match( '%/\?%', $string2[0] ) ) {
+ $string = trim( $string2[1] );
$protocol = wp_kses_bad_protocol_once2( $string2[0], $allowed_protocols );
if ( 'feed:' == $protocol ) {
- if ( $count > 2 )
+ if ( $count > 2 ) {
return '';
+ }
$string = wp_kses_bad_protocol_once( $string, $allowed_protocols, ++$count );
- if ( empty( $string ) )
+ if ( empty( $string ) ) {
return $string;
+ }
}
$string = $protocol . $string;
}
@@ -1340,35 +1678,38 @@
}
/**
- * Callback for wp_kses_bad_protocol_once() regular expression.
+ * Callback for `wp_kses_bad_protocol_once()` regular expression.
*
* This function processes URL protocols, checks to see if they're in the
* whitelist or not, and returns different data depending on the answer.
*
* @access private
+ * @ignore
* @since 1.0.0
*
- * @param string $string URI scheme to check against the whitelist
- * @param string $allowed_protocols Allowed protocols
- * @return string Sanitized content
+ * @param string $string URI scheme to check against the whitelist.
+ * @param string[] $allowed_protocols Array of allowed URL protocols.
+ * @return string Sanitized content.
*/
function wp_kses_bad_protocol_once2( $string, $allowed_protocols ) {
- $string2 = wp_kses_decode_entities($string);
- $string2 = preg_replace('/\s/', '', $string2);
- $string2 = wp_kses_no_null($string2);
- $string2 = strtolower($string2);
+ $string2 = wp_kses_decode_entities( $string );
+ $string2 = preg_replace( '/\s/', '', $string2 );
+ $string2 = wp_kses_no_null( $string2 );
+ $string2 = strtolower( $string2 );
$allowed = false;
- foreach ( (array) $allowed_protocols as $one_protocol )
- if ( strtolower($one_protocol) == $string2 ) {
+ foreach ( (array) $allowed_protocols as $one_protocol ) {
+ if ( strtolower( $one_protocol ) == $string2 ) {
$allowed = true;
break;
}
+ }
- if ($allowed)
+ if ( $allowed ) {
return "$string2:";
- else
+ } else {
return '';
+ }
}
/**
@@ -1379,23 +1720,23 @@
*
* @since 1.0.0
*
- * @param string $string Content to normalize entities
- * @return string Content with normalized entities
+ * @param string $string Content to normalize entities.
+ * @return string Content with normalized entities.
*/
-function wp_kses_normalize_entities($string) {
+function wp_kses_normalize_entities( $string ) {
// Disarm all entities by converting & to &
- $string = str_replace('&', '&', $string);
+ $string = str_replace( '&', '&', $string );
// Change back the allowed entities in our entity whitelist
- $string = preg_replace_callback('/&([A-Za-z]{2,8}[0-9]{0,2});/', 'wp_kses_named_entities', $string);
- $string = preg_replace_callback('/&#(0*[0-9]{1,7});/', 'wp_kses_normalize_entities2', $string);
- $string = preg_replace_callback('/&#[Xx](0*[0-9A-Fa-f]{1,6});/', 'wp_kses_normalize_entities3', $string);
+ $string = preg_replace_callback( '/&([A-Za-z]{2,8}[0-9]{0,2});/', 'wp_kses_named_entities', $string );
+ $string = preg_replace_callback( '/&#(0*[0-9]{1,7});/', 'wp_kses_normalize_entities2', $string );
+ $string = preg_replace_callback( '/&#[Xx](0*[0-9A-Fa-f]{1,6});/', 'wp_kses_normalize_entities3', $string );
return $string;
}
/**
- * Callback for wp_kses_normalize_entities() regular expression.
+ * Callback for `wp_kses_normalize_entities()` regular expression.
*
* This function only accepts valid named entity references, which are finite,
* case-sensitive, and highly scrutinized by HTML and XML validators.
@@ -1404,38 +1745,41 @@
*
* @global array $allowedentitynames
*
- * @param array $matches preg_replace_callback() matches array
- * @return string Correctly encoded entity
+ * @param array $matches preg_replace_callback() matches array.
+ * @return string Correctly encoded entity.
*/
-function wp_kses_named_entities($matches) {
+function wp_kses_named_entities( $matches ) {
global $allowedentitynames;
- if ( empty($matches[1]) )
+ if ( empty( $matches[1] ) ) {
return '';
+ }
$i = $matches[1];
return ( ! in_array( $i, $allowedentitynames ) ) ? "&$i;" : "&$i;";
}
/**
- * Callback for wp_kses_normalize_entities() regular expression.
+ * Callback for `wp_kses_normalize_entities()` regular expression.
*
- * This function helps wp_kses_normalize_entities() to only accept 16-bit
+ * This function helps `wp_kses_normalize_entities()` to only accept 16-bit
* values and nothing more for `&#number;` entities.
*
* @access private
+ * @ignore
* @since 1.0.0
*
- * @param array $matches preg_replace_callback() matches array
- * @return string Correctly encoded entity
+ * @param array $matches `preg_replace_callback()` matches array.
+ * @return string Correctly encoded entity.
*/
-function wp_kses_normalize_entities2($matches) {
- if ( empty($matches[1]) )
+function wp_kses_normalize_entities2( $matches ) {
+ if ( empty( $matches[1] ) ) {
return '';
+ }
$i = $matches[1];
- if (valid_unicode($i)) {
- $i = str_pad(ltrim($i,'0'), 3, '0', STR_PAD_LEFT);
+ if ( valid_unicode( $i ) ) {
+ $i = str_pad( ltrim( $i, '0' ), 3, '0', STR_PAD_LEFT );
$i = "&#$i;";
} else {
$i = "&#$i;";
@@ -1445,63 +1789,67 @@
}
/**
- * Callback for wp_kses_normalize_entities() for regular expression.
+ * Callback for `wp_kses_normalize_entities()` for regular expression.
*
- * This function helps wp_kses_normalize_entities() to only accept valid Unicode
+ * This function helps `wp_kses_normalize_entities()` to only accept valid Unicode
* numeric entities in hex form.
*
* @since 2.7.0
* @access private
+ * @ignore
*
- * @param array $matches preg_replace_callback() matches array
- * @return string Correctly encoded entity
+ * @param array $matches `preg_replace_callback()` matches array.
+ * @return string Correctly encoded entity.
*/
-function wp_kses_normalize_entities3($matches) {
- if ( empty($matches[1]) )
+function wp_kses_normalize_entities3( $matches ) {
+ if ( empty( $matches[1] ) ) {
return '';
+ }
$hexchars = $matches[1];
- return ( ! valid_unicode( hexdec( $hexchars ) ) ) ? "&#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';';
+ return ( ! valid_unicode( hexdec( $hexchars ) ) ) ? "&#x$hexchars;" : '&#x' . ltrim( $hexchars, '0' ) . ';';
}
/**
- * Helper function to determine if a Unicode value is valid.
+ * Determines if a Unicode codepoint is valid.
*
* @since 2.7.0
*
- * @param int $i Unicode value
- * @return bool True if the value was a valid Unicode number
+ * @param int $i Unicode codepoint.
+ * @return bool Whether or not the codepoint is a valid Unicode codepoint.
*/
-function valid_unicode($i) {
+function valid_unicode( $i ) {
return ( $i == 0x9 || $i == 0xa || $i == 0xd ||
- ($i >= 0x20 && $i <= 0xd7ff) ||
- ($i >= 0xe000 && $i <= 0xfffd) ||
- ($i >= 0x10000 && $i <= 0x10ffff) );
+ ( $i >= 0x20 && $i <= 0xd7ff ) ||
+ ( $i >= 0xe000 && $i <= 0xfffd ) ||
+ ( $i >= 0x10000 && $i <= 0x10ffff ) );
}
/**
- * Convert all entities to their character counterparts.
+ * Converts all numeric HTML entities to their named counterparts.
*
* This function decodes numeric HTML entities (`A` and `A`).
- * It doesn't do anything with other entities like ä, but we don't
+ * It doesn't do anything with named entities like `ä`, but we don't
* need them in the URL protocol whitelisting system anyway.
*
* @since 1.0.0
*
- * @param string $string Content to change entities
- * @return string Content after decoded entities
+ * @param string $string Content to change entities.
+ * @return string Content after decoded entities.
*/
-function wp_kses_decode_entities($string) {
- $string = preg_replace_callback('/&#([0-9]+);/', '_wp_kses_decode_entities_chr', $string);
- $string = preg_replace_callback('/&#[Xx]([0-9A-Fa-f]+);/', '_wp_kses_decode_entities_chr_hexdec', $string);
+function wp_kses_decode_entities( $string ) {
+ $string = preg_replace_callback( '/&#([0-9]+);/', '_wp_kses_decode_entities_chr', $string );
+ $string = preg_replace_callback( '/&#[Xx]([0-9A-Fa-f]+);/', '_wp_kses_decode_entities_chr_hexdec', $string );
return $string;
}
/**
- * Regex callback for wp_kses_decode_entities()
+ * Regex callback for `wp_kses_decode_entities()`.
*
* @since 2.9.0
+ * @access private
+ * @ignore
*
* @param array $match preg match
* @return string
@@ -1511,9 +1859,11 @@
}
/**
- * Regex callback for wp_kses_decode_entities()
+ * Regex callback for `wp_kses_decode_entities()`.
*
* @since 2.9.0
+ * @access private
+ * @ignore
*
* @param array $match preg match
* @return string
@@ -1523,38 +1873,44 @@
}
/**
- * Sanitize content with allowed HTML Kses rules.
+ * Sanitize content with allowed HTML KSES rules.
+ *
+ * This function expects slashed data.
*
* @since 1.0.0
*
- * @param string $data Content to filter, expected to be escaped with slashes
- * @return string Filtered content
+ * @param string $data Content to filter, expected to be escaped with slashes.
+ * @return string Filtered content.
*/
function wp_filter_kses( $data ) {
return addslashes( wp_kses( stripslashes( $data ), current_filter() ) );
}
/**
- * Sanitize content with allowed HTML Kses rules.
+ * Sanitize content with allowed HTML KSES rules.
+ *
+ * This function expects unslashed data.
*
* @since 2.9.0
*
- * @param string $data Content to filter, expected to not be escaped
- * @return string Filtered content
+ * @param string $data Content to filter, expected to not be escaped.
+ * @return string Filtered content.
*/
function wp_kses_data( $data ) {
return wp_kses( $data, current_filter() );
}
/**
- * Sanitize content for allowed HTML tags for post content.
+ * Sanitizes content for allowed HTML tags for post content.
*
- * Post content refers to the page contents of the 'post' type and not $_POST
+ * Post content refers to the page contents of the 'post' type and not `$_POST`
* data from forms.
*
+ * This function expects slashed data.
+ *
* @since 2.0.0
*
- * @param string $data Post content to filter, expected to be escaped with slashes
+ * @param string $data Post content to filter, expected to be escaped with slashes.
* @return string Filtered post content with allowed HTML tags and attributes intact.
*/
function wp_filter_post_kses( $data ) {
@@ -1562,14 +1918,16 @@
}
/**
- * Sanitize content for allowed HTML tags for post content.
+ * Sanitizes content for allowed HTML tags for post content.
*
- * Post content refers to the page contents of the 'post' type and not $_POST
+ * Post content refers to the page contents of the 'post' type and not `$_POST`
* data from forms.
*
+ * This function expects unslashed data.
+ *
* @since 2.9.0
*
- * @param string $data Post content to filter
+ * @param string $data Post content to filter.
* @return string Filtered post content with allowed HTML tags and attributes intact.
*/
function wp_kses_post( $data ) {
@@ -1592,80 +1950,79 @@
}
/**
- * Strips all of the HTML in the content.
+ * Strips all HTML from a text string.
+ *
+ * This function expects slashed data.
*
* @since 2.1.0
*
- * @param string $data Content to strip all HTML from
- * @return string Filtered content without any HTML
+ * @param string $data Content to strip all HTML from.
+ * @return string Filtered content without any HTML.
*/
function wp_filter_nohtml_kses( $data ) {
return addslashes( wp_kses( stripslashes( $data ), 'strip' ) );
}
/**
- * Adds all Kses input form content filters.
+ * Adds all KSES input form content filters.
*
- * All hooks have default priority. The wp_filter_kses() function is added to
+ * All hooks have default priority. The `wp_filter_kses()` function is added to
* the 'pre_comment_content' and 'title_save_pre' hooks.
*
- * The wp_filter_post_kses() function is added to the 'content_save_pre',
+ * The `wp_filter_post_kses()` function is added to the 'content_save_pre',
* 'excerpt_save_pre', and 'content_filtered_save_pre' hooks.
*
* @since 2.0.0
*/
function kses_init_filters() {
// Normal filtering
- add_filter('title_save_pre', 'wp_filter_kses');
+ add_filter( 'title_save_pre', 'wp_filter_kses' );
// Comment filtering
- if ( current_user_can( 'unfiltered_html' ) )
+ if ( current_user_can( 'unfiltered_html' ) ) {
add_filter( 'pre_comment_content', 'wp_filter_post_kses' );
- else
+ } else {
add_filter( 'pre_comment_content', 'wp_filter_kses' );
+ }
// Post filtering
- add_filter('content_save_pre', 'wp_filter_post_kses');
- add_filter('excerpt_save_pre', 'wp_filter_post_kses');
- add_filter('content_filtered_save_pre', 'wp_filter_post_kses');
+ add_filter( 'content_save_pre', 'wp_filter_post_kses' );
+ add_filter( 'excerpt_save_pre', 'wp_filter_post_kses' );
+ add_filter( 'content_filtered_save_pre', 'wp_filter_post_kses' );
}
/**
- * Removes all Kses input form content filters.
+ * Removes all KSES input form content filters.
*
- * A quick procedural method to removing all of the filters that kses uses for
+ * A quick procedural method to removing all of the filters that KSES uses for
* content in WordPress Loop.
*
- * Does not remove the kses_init() function from {@see 'init'} hook (priority is
- * default). Also does not remove kses_init() function from {@see 'set_current_user'}
+ * Does not remove the `kses_init()` function from {@see 'init'} hook (priority is
+ * default). Also does not remove `kses_init()` function from {@see 'set_current_user'}
* hook (priority is also default).
*
* @since 2.0.6
*/
function kses_remove_filters() {
// Normal filtering
- remove_filter('title_save_pre', 'wp_filter_kses');
+ remove_filter( 'title_save_pre', 'wp_filter_kses' );
// Comment filtering
remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
remove_filter( 'pre_comment_content', 'wp_filter_kses' );
// Post filtering
- remove_filter('content_save_pre', 'wp_filter_post_kses');
- remove_filter('excerpt_save_pre', 'wp_filter_post_kses');
- remove_filter('content_filtered_save_pre', 'wp_filter_post_kses');
+ remove_filter( 'content_save_pre', 'wp_filter_post_kses' );
+ remove_filter( 'excerpt_save_pre', 'wp_filter_post_kses' );
+ remove_filter( 'content_filtered_save_pre', 'wp_filter_post_kses' );
}
/**
- * Sets up most of the Kses filters for input form content.
+ * Sets up most of the KSES filters for input form content.
*
- * If you remove the kses_init() function from {@see 'init'} hook and
- * {@see 'set_current_user'} (priority is default), then none of the Kses filter hooks
- * will be added.
- *
- * First removes all of the Kses filters in case the current user does not need
- * to have Kses filter the content. If the user does not have unfiltered_html
- * capability, then Kses filters are added.
+ * First removes all of the KSES filters in case the current user does not need
+ * to have KSES filter the content. If the user does not have `unfiltered_html`
+ * capability, then KSES filters are added.
*
* @since 2.0.0
*/
@@ -1678,23 +2035,23 @@
}
/**
- * Inline CSS filter
+ * Filters an inline style attribute and removes disallowed rules.
*
* @since 2.8.1
*
* @param string $css A string of CSS rules.
* @param string $deprecated Not used.
- * @return string Filtered string of CSS rules.
+ * @return string Filtered string of CSS rules.
*/
function safecss_filter_attr( $css, $deprecated = '' ) {
- if ( !empty( $deprecated ) )
+ if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.8.1' ); // Never implemented
+ }
- $css = wp_kses_no_null($css);
- $css = str_replace(array("\n","\r","\t"), '', $css);
+ $css = wp_kses_no_null( $css );
+ $css = str_replace( array( "\n", "\r", "\t" ), '', $css );
- if ( preg_match( '%[\\\\(&=}]|/\*%', $css ) ) // remove any inline css containing \ ( & } = or comments
- return '';
+ $allowed_protocols = wp_allowed_protocols();
$css_array = explode( ';', trim( $css ) );
@@ -1704,99 +2061,166 @@
* @since 2.8.1
* @since 4.4.0 Added support for `min-height`, `max-height`, `min-width`, and `max-width`.
* @since 4.6.0 Added support for `list-style-type`.
+ * @since 5.0.0 Added support for `background-image`.
+ * @since 5.1.0 Added support for `text-transform`.
+ * @since 5.2.0 Added support for `background-position` and `grid-template-columns`
*
- * @param array $attr List of allowed CSS attributes.
+ * @param string[] $attr Array of allowed CSS attributes.
*/
- $allowed_attr = apply_filters( 'safe_style_css', array(
- 'background',
- 'background-color',
+ $allowed_attr = apply_filters(
+ 'safe_style_css',
+ array(
+ 'background',
+ 'background-color',
+ 'background-image',
+ 'background-position',
- 'border',
- 'border-width',
- 'border-color',
- 'border-style',
- 'border-right',
- 'border-right-color',
- 'border-right-style',
- 'border-right-width',
- 'border-bottom',
- 'border-bottom-color',
- 'border-bottom-style',
- 'border-bottom-width',
- 'border-left',
- 'border-left-color',
- 'border-left-style',
- 'border-left-width',
- 'border-top',
- 'border-top-color',
- 'border-top-style',
- 'border-top-width',
+ 'border',
+ 'border-width',
+ 'border-color',
+ 'border-style',
+ 'border-right',
+ 'border-right-color',
+ 'border-right-style',
+ 'border-right-width',
+ 'border-bottom',
+ 'border-bottom-color',
+ 'border-bottom-style',
+ 'border-bottom-width',
+ 'border-left',
+ 'border-left-color',
+ 'border-left-style',
+ 'border-left-width',
+ 'border-top',
+ 'border-top-color',
+ 'border-top-style',
+ 'border-top-width',
- 'border-spacing',
- 'border-collapse',
- 'caption-side',
+ 'border-spacing',
+ 'border-collapse',
+ 'caption-side',
+
+ 'color',
+ 'font',
+ 'font-family',
+ 'font-size',
+ 'font-style',
+ 'font-variant',
+ 'font-weight',
+ 'letter-spacing',
+ 'line-height',
+ 'text-align',
+ 'text-decoration',
+ 'text-indent',
+ 'text-transform',
- 'color',
- 'font',
- 'font-family',
- 'font-size',
- 'font-style',
- 'font-variant',
- 'font-weight',
- 'letter-spacing',
- 'line-height',
- 'text-decoration',
- 'text-indent',
- 'text-align',
+ 'height',
+ 'min-height',
+ 'max-height',
+
+ 'width',
+ 'min-width',
+ 'max-width',
- 'height',
- 'min-height',
- 'max-height',
+ 'margin',
+ 'margin-right',
+ 'margin-bottom',
+ 'margin-left',
+ 'margin-top',
- 'width',
- 'min-width',
- 'max-width',
+ 'padding',
+ 'padding-right',
+ 'padding-bottom',
+ 'padding-left',
+ 'padding-top',
- 'margin',
- 'margin-right',
- 'margin-bottom',
- 'margin-left',
- 'margin-top',
-
- 'padding',
- 'padding-right',
- 'padding-bottom',
- 'padding-left',
- 'padding-top',
+ 'clear',
+ 'cursor',
+ 'direction',
+ 'float',
+ 'overflow',
+ 'vertical-align',
+ 'list-style-type',
+ 'grid-template-columns',
+ )
+ );
- 'clear',
+ /*
+ * CSS attributes that accept URL data types.
+ *
+ * This is in accordance to the CSS spec and unrelated to
+ * the sub-set of supported attributes above.
+ *
+ * See: https://developer.mozilla.org/en-US/docs/Web/CSS/url
+ */
+ $css_url_data_types = array(
+ 'background',
+ 'background-image',
+
'cursor',
- 'direction',
- 'float',
- 'overflow',
- 'vertical-align',
- 'list-style-type',
- ) );
- if ( empty($allowed_attr) )
+ 'list-style',
+ 'list-style-image',
+ );
+
+ if ( empty( $allowed_attr ) ) {
return $css;
+ }
$css = '';
foreach ( $css_array as $css_item ) {
- if ( $css_item == '' )
+ if ( $css_item == '' ) {
continue;
- $css_item = trim( $css_item );
- $found = false;
+ }
+
+ $css_item = trim( $css_item );
+ $css_test_string = $css_item;
+ $found = false;
+ $url_attr = false;
+
if ( strpos( $css_item, ':' ) === false ) {
$found = true;
} else {
- $parts = explode( ':', $css_item );
- if ( in_array( trim( $parts[0] ), $allowed_attr ) )
- $found = true;
+ $parts = explode( ':', $css_item, 2 );
+ $css_selector = trim( $parts[0] );
+
+ if ( in_array( $css_selector, $allowed_attr, true ) ) {
+ $found = true;
+ $url_attr = in_array( $css_selector, $css_url_data_types, true );
+ }
}
- if ( $found ) {
- if( $css != '' )
+
+ if ( $found && $url_attr ) {
+ // Simplified: matches the sequence `url(*)`.
+ preg_match_all( '/url\([^)]+\)/', $parts[1], $url_matches );
+
+ foreach ( $url_matches[0] as $url_match ) {
+ // Clean up the URL from each of the matches above.
+ preg_match( '/^url\(\s*([\'\"]?)(.*)(\g1)\s*\)$/', $url_match, $url_pieces );
+
+ if ( empty( $url_pieces[2] ) ) {
+ $found = false;
+ break;
+ }
+
+ $url = trim( $url_pieces[2] );
+
+ if ( empty( $url ) || $url !== wp_kses_bad_protocol( $url, $allowed_protocols ) ) {
+ $found = false;
+ break;
+ } else {
+ // Remove the whole `url(*)` bit that was matched above from the CSS.
+ $css_test_string = str_replace( $url_match, '', $css_test_string );
+ }
+ }
+ }
+
+ // Remove any CSS containing containing \ ( & } = or comments, except for url() useage checked above.
+ if ( $found && ! preg_match( '%[\\\(&=}]|/\*%', $css_test_string ) ) {
+ if ( $css != '' ) {
$css .= ';';
+ }
+
$css .= $css_item;
}
}
@@ -1808,25 +2232,35 @@
* Helper function to add global attributes to a tag in the allowed html list.
*
* @since 3.5.0
+ * @since 5.0.0 Add support for `data-*` wildcard attributes.
* @access private
+ * @ignore
*
* @param array $value An array of attributes.
* @return array The array of attributes with global attributes added.
*/
function _wp_add_global_attributes( $value ) {
$global_attributes = array(
- 'class' => true,
- 'id' => true,
- 'style' => true,
- 'title' => true,
- 'role' => true,
+ 'aria-describedby' => true,
+ 'aria-details' => true,
+ 'aria-label' => true,
+ 'aria-labelledby' => true,
+ 'aria-hidden' => true,
+ 'class' => true,
+ 'id' => true,
+ 'style' => true,
+ 'title' => true,
+ 'role' => true,
+ 'data-*' => true,
);
- if ( true === $value )
+ if ( true === $value ) {
$value = array();
+ }
- if ( is_array( $value ) )
+ if ( is_array( $value ) ) {
return array_merge( $value, $global_attributes );
+ }
return $value;
}