Ticket #6590: has-tag.2.diff

wp-includes/category-template.php

@@ -540 +540 @@
                 echo $return;
 }
 
+/**
+ * has_tag() - Check if the current post has the given tag
+ *
+ * @package WordPress
+ * @since 2.5.1
+ *
+ * @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;
+}
+
 ?>