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Add new has_tag() template tag. Fixes #6590 props Otto42.

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git-svn-id: https://develop.svn.wordpress.org/trunk@8131 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Peter Westwood 2008-06-20 13:52:18 +00:00
parent 58e2526423
commit 27f6aaeb80
1 changed files with 37 additions and 0 deletions
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37
wp-includes/category-template.php
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@ -539,4 +539,41 @@ function the_terms( $id, $taxonomy, $before = '', $sep = '', $after = '' ) {
echo $return;
}
/**
* Check if the current post has the given tag
*
* @package WordPress
* @since 2.6
*
* @uses wp_get_object_terms() Gets the tags.
*
* @param string|int|array $tag Optional. The tag name/id/slug or array of them to check for
* @return bool True if the current post has the given tag, or any tag, if no tag specified
*/
function has_tag($tag = '') {
global $post;
$taxonomy = 'post_tag';
if ( !in_the_loop() ) return false; // in-the-loop function
$post_id = (int) $post->ID;
$terms = get_object_term_cache($post_id, $taxonomy);
if (empty($terms))
$terms = wp_get_object_terms($post_id, $taxonomy);
if (empty($terms)) return false;
if (empty($tag)) return (!empty($terms));
$tag = (array) $tag;
foreach($terms as $term) {
if ( in_array( $term->term_id, $tag ) ) return true;
if ( in_array( $term->name, $tag ) ) return true;
if ( in_array( $term->slug, $tag ) ) return true;
}
return false;
}
?>