* Permalink Settings Administration Screen.

require_once('./admin.php');

if ( ! current_user_can( 'manage_options' ) )

	wp_die( __( 'You do not have sufficient permissions to manage options for this site.' ) );

get_current_screen()->add_help_tab( array(

	'id'      => 'overview',

	'title'   => __('Overview'),

	'content' => '<p>' . __('Permalinks are the permanent URLs to your individual pages and blog posts, as well as your category and tag archives. A permalink is the web address used to link to your content. The URL to each post should be permanent, and never change &#8212; hence the name permalink.') . '</p>' .

		'<p>' . __('This screen allows you to choose your default permalink structure. You can choose from common settings or create custom URL structures.') . '</p>' .

		'<p>' . __('You must click the Save Changes button at the bottom of the screen for new settings to take effect.') . '</p>',

) );

get_current_screen()->add_help_tab( array(

	'id'      => 'common-settings',

	'title'   => __('Common Settings'),

	'content' => '<p>' . __('Many people choose to use &#8220;pretty permalinks,&#8221; URLs that contain useful information such as the post title rather than generic post ID numbers. You can choose from any of the permalink formats under Common Settings, or can craft your own if you select Custom Structure.') . '</p>' .

		'<p>' . __('If you pick an option other than Default, your general URL path with structure tags, terms surrounded by <code>%</code>, will also appear in the custom structure field and your path can be further modified there.') . '</p>' .

		'<p>' . __('When you assign multiple categories or tags to a post, only one can show up in the permalink: the lowest numbered category. This applies if your custom structure includes <code>%category%</code> or <code>%tag%</code>.') . '</p>' .

		'<p>' . __('You must click the Save Changes button at the bottom of the screen for new settings to take effect.') . '</p>',

) );

get_current_screen()->add_help_tab( array(

	'id'      => 'custom-structures',

	'title'   => __('Custom Structures'),

	'content' => '<p>' . __('The Optional fields let you customize the &#8220;category&#8221; and &#8220;tag&#8221; base names that will appear in archive URLs. For example, the page listing all posts in the &#8220;Uncategorized&#8221; category could be <code>/topics/uncategorized</code> instead of <code>/category/uncategorized</code>.') . '</p>' .

		'<p>' . __('You must click the Save Changes button at the bottom of the screen for new settings to take effect.') . '</p>',

) );

get_current_screen()->set_help_sidebar(

	'<p><strong>' . __('For more information:') . '</strong></p>' .

	'<p>' . __('<a href="http://codex.wordpress.org/Settings_Permalinks_Screen" target="_blank">Documentation on Permalinks Settings</a>') . '</p>' .

	'<p>' . __('<a href="http://codex.wordpress.org/Using_Permalinks" target="_blank">Documentation on Using Permalinks</a>') . '</p>' .

	'<p>' . __('<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>') . '</p>'

);

 * @subpackage Permalink_Settings_Screen

	?>

jQuery(document).ready(function() {

	jQuery('input:radio.tog').change(function() {

		if ( 'custom' == this.value )

			return;

		jQuery('#permalink_structure').val( this.value );

	});

	jQuery('#permalink_structure').focus(function() {

		jQuery("#custom_selection").attr('checked', 'checked');

	});

});

include('./admin-header.php');

$prefix = $blog_prefix = '';

if ( ! got_mod_rewrite() && ! $iis7_permalinks )

	$prefix = '/index.php';

if ( is_multisite() && !is_subdomain_install() && is_main_site() )

	$blog_prefix = '/blog';

	if ( isset( $_POST['permalink_structure'] ) ) {

		if ( isset( $_POST['selection'] ) && 'custom' != $_POST['selection'] )

			$permalink_structure = $_POST['selection'];

		else

			$permalink_structure = $_POST['permalink_structure'];

		if ( ! empty( $permalink_structure ) ) {

			$permalink_structure = preg_replace( '#/+#', '/', '/' . str_replace( '#', '', $permalink_structure ) );

			if ( $prefix && $blog_prefix )

				$permalink_structure = $prefix . preg_replace( '#^/?index\.php#', '', $permalink_structure );

			else

				$permalink_structure = $blog_prefix . $permalink_structure;

		}

		$wp_rewrite->set_permalink_structure( $permalink_structure );

	if ( isset( $_POST['category_base'] ) ) {

		if ( ! empty( $category_base ) )

			$category_base = $blog_prefix . preg_replace('#/+#', '/', '/' . str_replace( '#', '', $category_base ) );

		$wp_rewrite->set_category_base( $category_base );

	if ( isset( $_POST['tag_base'] ) ) {

		if ( ! empty( $tag_base ) )

			$tag_base = $blog_prefix . preg_replace('#/+#', '/', '/' . str_replace( '#', '', $tag_base ) );

		$wp_rewrite->set_tag_base( $tag_base );

	create_initial_taxonomies();

flush_rewrite_rules();

if (isset($_POST['submit'])) : ?>

<div id="message" class="updated"><p><?php

if ( ! is_multisite() ) {

	if ( $iis7_permalinks ) {

		if ( $permalink_structure && ! $usingpi && ! $writable )

			_e('You should update your web.config now.');

		else if ( $permalink_structure && ! $usingpi && $writable )

			_e('Permalink structure updated. Remove write access on web.config file now!');

		else

			_e('Permalink structure updated.');

	} else {

		if ( $permalink_structure && ! $usingpi && ! $writable )

			_e('You should update your .htaccess now.');

		else

			_e('Permalink structure updated.');

	}

	_e('Permalink structure updated.');

if ( is_multisite() && !is_subdomain_install() && is_main_site() ) {

	$permalink_structure = preg_replace( '|^/?blog|', '', $permalink_structure );

	$category_base = preg_replace( '|^/?blog|', '', $category_base );

	$tag_base = preg_replace( '|^/?blog|', '', $tag_base );

}

	0 => '',

	1 => $prefix . '/%year%/%monthnum%/%day%/%postname%/',

	2 => $prefix . '/%year%/%monthnum%/%postname%/',

	3 => $prefix . '/' . _x( 'archives', 'sample permalink base' ) . '/%post_id%',

	4 => $prefix . '/%postname%/',

);

<h3><?php _e('Common Settings'); ?></h3>

		<td><code><?php echo get_option('home') . $blog_prefix . $prefix . '/' . date('Y') . '/' . date('m') . '/' . date('d') . '/' . _x( 'sample-post', 'sample permalink structure' ) . '/'; ?></code></td>

		<td><code><?php echo get_option('home') . $blog_prefix . $prefix . '/' . date('Y') . '/' . date('m') . '/' . _x( 'sample-post', 'sample permalink structure' ) . '/'; ?></code></td>

		<td><code><?php echo get_option('home') . $blog_prefix . $prefix . '/' . _x( 'archives', 'sample permalink base' ) . '/123'; ?></code></td>

	</tr>

	<tr>

		<th><label><input name="selection" type="radio" value="<?php echo esc_attr($structures[4]); ?>" class="tog" <?php checked($structures[4], $permalink_structure); ?> /> <?php _e('Post name'); ?></label></th>

		<td><code><?php echo get_option('home') . $blog_prefix . $prefix . '/' . _x( 'sample-post', 'sample permalink structure' ) . '/'; ?></code></td>

			<label><input name="selection" id="custom_selection" type="radio" value="custom" class="tog" <?php checked( !in_array($permalink_structure, $structures) ); ?> />

			<?php echo $blog_prefix; ?>

<?php

$suffix = '';

if ( ! $is_apache && ! $iis7_permalinks )

	$suffix = 'index.php/';

?>

<p><?php

/* translators: %s is a placeholder that must come at the start of the URL path. */

printf( __('If you like, you may enter custom structures for your category and tag <abbr title="Universal Resource Locator">URL</abbr>s here. For example, using <code>topics</code> as your category base would make your category links like <code>http://example.org/%stopics/uncategorized/</code>. If you leave these blank the defaults will be used.'), $suffix ); ?></p>

		<th><label for="category_base"><?php /* translators: prefix for category permalinks */ _e('Category base'); ?></label></th>

		<td><?php echo $blog_prefix; ?> <input name="category_base" id="category_base" type="text" value="<?php echo esc_attr( $category_base ); ?>" class="regular-text code" /></td>

		<td><?php echo $blog_prefix; ?> <input name="tag_base" id="tag_base" type="text" value="<?php echo esc_attr($tag_base); ?>" class="regular-text code" /></td>

<?php submit_button(); ?>

<?php if ( !is_multisite() ) { ?>

<?php if ( $iis7_permalinks ) :

	if ( isset($_POST['submit']) && $permalink_structure && ! $usingpi && ! $writable ) :

	<p><textarea rows="9" class="large-text readonly" name="rules" id="rules" readonly="readonly"><?php echo esc_textarea( $wp_rewrite->iis7_url_rewrite_rules() ); ?></textarea></p>

<p><?php _e('If you temporarily make your <code>web.config</code> file writable for us to generate rewrite rules automatically, do not forget to revert the permissions after rule has been saved.') ?></p>

	<p><textarea rows="18" class="large-text readonly" name="rules" id="rules" readonly="readonly"><?php echo esc_textarea( $wp_rewrite->iis7_url_rewrite_rules(true) ); ?></textarea></p>

<p><?php _e('If you temporarily make your site&#8217;s root directory writable for us to generate the <code>web.config</code> file automatically, do not forget to revert the permissions after the file has been created.') ?></p>

	<p><textarea rows="6" class="large-text readonly" name="rules" id="rules" readonly="readonly"><?php echo esc_textarea( $wp_rewrite->mod_rewrite_rules() ); ?></textarea></p>

<?php } // multisite ?>