1 <?php

     2 /**

     3  * WordPress implementation for PHP functions missing from older PHP versions.

     4  *

     5  * @package PHP

     6  * @access private

     7  */

     8 

     9 // Added in PHP 5.0

    10 

    11 if (!function_exists('http_build_query')) {

    12 	function http_build_query($data, $prefix=null, $sep=null) {

    13 		return _http_build_query($data, $prefix, $sep);

    14 	}

    15 }

    16 

    17 // from php.net (modified by Mark Jaquith to behave like the native PHP5 function)

    18 function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {

    19 	$ret = array();

    20 

    21 	foreach ( (array) $data as $k => $v ) {

    22 		if ( $urlencode)

    23 			$k = urlencode($k);

    24 		if ( is_int($k) && $prefix != null )

    25 			$k = $prefix.$k;

    26 		if ( !empty($key) )

    27 			$k = $key . '%5B' . $k . '%5D';

    28 		if ( $v === NULL )

    29 			continue;

    30 		elseif ( $v === FALSE )

    31 			$v = '0';

    32 

    33 		if ( is_array($v) || is_object($v) )

    34 			array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));

    35 		elseif ( $urlencode )

    36 			array_push($ret, $k.'='.urlencode($v));

    37 		else

    38 			array_push($ret, $k.'='.$v);

    39 	}

    40 

    41 	if ( NULL === $sep )

    42 		$sep = ini_get('arg_separator.output');

    43 

    44 	return implode($sep, $ret);

    45 }

    46 

    47 if ( !function_exists('_') ) {

    48 	function _($string) {

    49 		return $string;

    50 	}

    51 }

    52 

    53 if (!function_exists('stripos')) {

    54 	function stripos($haystack, $needle, $offset = 0) {

    55 		return strpos(strtolower($haystack), strtolower($needle), $offset);

    56 	}

    57 }

    58 

    59 if ( !function_exists('hash_hmac') ):

    60 function hash_hmac($algo, $data, $key, $raw_output = false) {

    61 	return _hash_hmac($algo, $data, $key, $raw_output);

    62 }

    63 endif;

    64 

    65 function _hash_hmac($algo, $data, $key, $raw_output = false) {

    66 	$packs = array('md5' => 'H32', 'sha1' => 'H40');

    67 

    68 	if ( !isset($packs[$algo]) )

    69 		return false;

    70 

    71 	$pack = $packs[$algo];

    72 

    73 	if (strlen($key) > 64)

    74 		$key = pack($pack, $algo($key));

    75 

    76 	$key = str_pad($key, 64, chr(0));

    77 

    78 	$ipad = (substr($key, 0, 64) ^ str_repeat(chr(0x36), 64));

    79 	$opad = (substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64));

    80 

    81 	$hmac = $algo($opad . pack($pack, $algo($ipad . $data)));

    82 

    83 	if ( $raw_output )

    84 		return pack( $pack, $hmac );

    85 	return $hmac;

    86 }

    87 

    88 if ( !function_exists('mb_substr') ):

    89 	function mb_substr( $str, $start, $length=null, $encoding=null ) {

    90 		return _mb_substr($str, $start, $length, $encoding);

    91 	}

    92 endif;

    93 

    94 function _mb_substr( $str, $start, $length=null, $encoding=null ) {

    95 	// the solution below, works only for utf-8, so in case of a different

    96 	// charset, just use built-in substr

    97 	$charset = get_option( 'blog_charset' );

    98 	if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {

    99 		return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);

   100 	}

   101 	// use the regex unicode support to separate the UTF-8 characters into an array

   102 	preg_match_all( '/./us', $str, $match );

   103 	$chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );

   104 	return implode( '', $chars );

   105 }

   106 

   107 if ( !function_exists( 'htmlspecialchars_decode' ) ) {

   108 	// Added in PHP 5.1.0

   109 	// Error checks from PEAR::PHP_Compat

   110 	function htmlspecialchars_decode( $string, $quote_style = ENT_COMPAT )

   111 	{

   112 		if ( !is_scalar( $string ) ) {

   113 			trigger_error( 'htmlspecialchars_decode() expects parameter 1 to be string, ' . gettype( $string ) . ' given', E_USER_WARNING );

   114 			return;

   115 		}

   116 

   117 		if ( !is_int( $quote_style ) && $quote_style !== null ) {

   118 			trigger_error( 'htmlspecialchars_decode() expects parameter 2 to be integer, ' . gettype( $quote_style ) . ' given', E_USER_WARNING );

   119 			return;

   120 		}

   121 

   122 		return wp_specialchars_decode( $string, $quote_style );

   123 	}

   124 }

   125 

   126 // For PHP < 5.2.0

   127 if ( !function_exists('json_encode') ) {

   128 	function json_encode( $string ) {

   129 		global $wp_json;

   130 

   131 		if ( !is_a($wp_json, 'Services_JSON') ) {

   132 			require_once( 'class-json.php' );

   133 			$wp_json = new Services_JSON();

   134 		}

   135 

   136 		return $wp_json->encodeUnsafe( $string );

   137 	}

   138 }

   139 

   140 if ( !function_exists('json_decode') ) {

   141 	function json_decode( $string ) {

   142 		global $wp_json;

   143 

   144 		if ( !is_a($wp_json, 'Services_JSON') ) {

   145 			require_once( 'class-json.php' );

   146 			$wp_json = new Services_JSON();

   147 		}

   148 

   149 		return $wp_json->decode( $string );

   150 	}

   151 }

   152 

   153 // pathinfo that fills 'filename' without extension like in PHP 5.2+

   154 function pathinfo52($path) {

   155 	$parts = pathinfo($path);

   156 	if ( !isset($parts['filename']) ) {

   157 		$parts['filename'] = substr( $parts['basename'], 0, strrpos($parts['basename'], '.') );

   158 		if ( empty($parts['filename']) ) // there's no extension

   159 			$parts['filename'] = $parts['basename'];

   160 	}

   161 	return $parts;

   162 }