WordPress/wp-admin/edit-tags.php

<?php
/**
 * Edit Tags Administration Panel.
 *
 * @package WordPress
 * @subpackage Administration
 */

/** WordPress Administration Bootstrap */
require_once('admin.php');

$title = __('Tags');

wp_reset_vars( array('action', 'tag') );

if ( isset( $_GET['action'] ) && isset($_GET['delete_tags']) && ( 'delete' == $_GET['action'] || 'delete' == $_GET['action2'] ) )
	$action = 'bulk-delete';

switch($action) {

case 'addtag':

	check_admin_referer('add-tag');

	if ( !current_user_can('manage_categories') )
		wp_die(__('Cheatin&#8217; uh?'));

	$ret = wp_insert_term($_POST['name'], 'post_tag', $_POST);
	if ( $ret && !is_wp_error( $ret ) ) {
		wp_redirect('edit-tags.php?message=1#addtag');
	} else {
		wp_redirect('edit-tags.php?message=4#addtag');
	}
	exit;
break;

case 'delete':
	$tag_ID = (int) $_GET['tag_ID'];
	check_admin_referer('delete-tag_' .  $tag_ID);

	if ( !current_user_can('manage_categories') )
		wp_die(__('Cheatin&#8217; uh?'));

	wp_delete_term( $tag_ID, 'post_tag');

	wp_redirect('edit-tags.php?message=2');
	exit;

break;

case 'bulk-delete':
	check_admin_referer('bulk-tags');

	if ( !current_user_can('manage_categories') )
		wp_die(__('Cheatin&#8217; uh?'));

	$tags = $_GET['delete_tags'];
	foreach( (array) $tags as $tag_ID ) {
		wp_delete_term( $tag_ID, 'post_tag');
	}

	$location = 'edit-tags.php';
	if ( $referer = wp_get_referer() ) {
		if ( false !== strpos($referer, 'edit-tags.php') )
			$location = $referer;
	}

	$location = add_query_arg('message', 6, $location);
	wp_redirect($location);
	exit;

break;

case 'edit':
	$title = __('Edit Tag');

	require_once ('admin-header.php');
	$tag_ID = (int) $_GET['tag_ID'];

	$tag = get_term($tag_ID, 'post_tag', OBJECT, 'edit');
	include('edit-tag-form.php');

break;

case 'editedtag':
	$tag_ID = (int) $_POST['tag_ID'];
	check_admin_referer('update-tag_' . $tag_ID);

	if ( !current_user_can('manage_categories') )
		wp_die(__('Cheatin&#8217; uh?'));

	$ret = wp_update_term($tag_ID, 'post_tag', $_POST);

	$location = 'edit-tags.php';
	if ( $referer = wp_get_original_referer() ) {
		if ( false !== strpos($referer, 'edit-tags.php') )
			$location = $referer;
	}

	if ( $ret && !is_wp_error( $ret ) )
		$location = add_query_arg('message', 3, $location);
	else
		$location = add_query_arg('message', 5, $location);

	wp_redirect($location);
	exit;
break;

default:

if ( isset($_GET['_wp_http_referer']) && ! empty($_GET['_wp_http_referer']) ) {
	 wp_redirect( remove_query_arg( array('_wp_http_referer', '_wpnonce'), stripslashes($_SERVER['REQUEST_URI']) ) );
	 exit;
}

wp_enqueue_script( 'admin-tags' );
wp_enqueue_script('admin-forms');
if ( current_user_can('manage_categories') )
	wp_enqueue_script('inline-edit-tax');

require_once ('admin-header.php');

$messages[1] = __('Tag added.');
$messages[2] = __('Tag deleted.');
$messages[3] = __('Tag updated.');
$messages[4] = __('Tag not added.');
$messages[5] = __('Tag not updated.');
$messages[6] = __('Tags deleted.'); ?>

<div id="screen-options-wrap" class="hidden">
<h5><?php _e('Show on screen') ?></h5>
<form id="adv-settings" action="" method="get">
<div class="metabox-prefs">
<?php manage_columns_prefs('tag') ?>
<?php wp_nonce_field( 'hiddencolumns', 'hiddencolumnsnonce', false ); ?>
<br class="clear" />
</div></form>
</div>

<?php if ( isset($_GET['message']) && ( $msg = (int) $_GET['message'] ) ) : ?>
<div id="message" class="updated fade"><p><?php echo $messages[$msg]; ?></p></div>
<?php $_SERVER['REQUEST_URI'] = remove_query_arg(array('message'), $_SERVER['REQUEST_URI']);
endif; ?>

<div class="wrap">
<h2 class="floatedh2"><?php echo wp_specialchars( $title ); ?></h2> 

<form class="search-form topmargin" action="" method="get">
<p class="search-box">
	<label class="hidden" for="post-search-input"><?php _e( 'Search Tags' ); ?>:</label>
	<input type="text" class="search-input" id="post-search-input" name="s" value="<?php _admin_search_query(); ?>" />
	<input type="submit" value="<?php _e( 'Search Tags' ); ?>" class="button-primary" />
</p>
</form>
<br class="clear" />

<form id="posts-filter" action="" method="get">
<div class="tablenav">

<?php
$pagenum = isset( $_GET['pagenum'] ) ? absint( $_GET['pagenum'] ) : 0;
if ( empty($pagenum) )
	$pagenum = 1;
if( ! isset( $tagsperpage ) || $tagsperpage < 0 )
	$tagsperpage = 20;

$page_links = paginate_links( array(
	'base' => add_query_arg( 'pagenum', '%#%' ),
	'format' => '',
	'prev_text' => __('&laquo;'),
	'next_text' => __('&raquo;'),
	'total' => ceil(wp_count_terms('post_tag') / $tagsperpage),
	'current' => $pagenum
));

if ( $page_links )
	echo "<div class='tablenav-pages'>$page_links</div>";
?>

<div class="alignleft actions">
<select name="action">
<option value="" selected="selected"><?php _e('Actions'); ?></option>
<option value="delete"><?php _e('Delete'); ?></option>
</select>
<input type="submit" value="<?php _e('Apply'); ?>" name="doaction" id="doaction" class="button-secondary action" />
<?php wp_nonce_field('bulk-tags'); ?>
</div>

<br class="clear" />
</div>

<div class="clear"></div>

<table class="widefat tag">
	<thead>
	<tr>
<?php print_column_headers('tag'); ?>
	</tr>
	</thead>

	<tfoot>
	<tr>
<?php print_column_headers('tag', false); ?>
	</tr>
	</tfoot>

	<tbody id="the-list" class="list:tag">
<?php

$searchterms = isset( $_GET['s'] ) ? trim( $_GET['s'] ) : '';

$count = tag_rows( $pagenum, $tagsperpage, $searchterms );
?>
	</tbody>
</table>

<div class="tablenav">
<?php
if ( $page_links )
	echo "<div class='tablenav-pages'>$page_links</div>";
?>

<div class="alignleft actions">
<select name="action2">
<option value="" selected="selected"><?php _e('Actions'); ?></option>
<option value="delete"><?php _e('Delete'); ?></option>
</select>
<input type="submit" value="<?php _e('Apply'); ?>" name="doaction2" id="doaction2" class="button-secondary action" />
</div>

<br class="clear" />
</div>

<br class="clear" />
</form>

</div>

<?php if ( current_user_can('manage_categories') ) : ?>

<br />
<?php include('edit-tag-form.php'); ?>
<?php inline_edit_term_row('tag'); ?>

<?php endif; ?>

<?php
break;
}

include('admin-footer.php');

?>