Ticket #24906: 24906.diff

wp-includes/post-formats.php

@@ -32 +32 @@
 }
 
 /**
- * Check if a post has a particular format
+ * Check if a post has any of given formats or any format at all.
  *
  * @since 3.1.0
  *
@@ -40 +40 @@
  *
  * @param string|array $format The format or formats to check.
  * @param object|int   $post   The post to check. If not supplied, defaults to the current post if used in the loop.
- * @return bool True if the post has the format, false otherwise.
+ * @return bool True if the post has any of the given formats (or any format, if no format specified), false otherwise.
  */
-function has_post_format( $format, $post = null ) {
+function has_post_format( $format = array(), $post = null ) {
         if ( ! is_array( $format ) )
                 $format = array( $format );
 
         $prefixed = array();
-        foreach( $format as $single ) {
-                $prefixed[] = 'post-format-' . sanitize_key( $single );
+        foreach ( $format as $single ) {
+                if ( ! empty( $single ) )
+                        $prefixed[] = 'post-format-' . sanitize_key( $single );
         }
 
         return has_term( $prefixed, 'post_format', $post );