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Source View: update_{$meta_type}_meta

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

This hook occurs 2 times in this file.

Line Code
140
141      $data  = compact( 'meta_value' );
142      $where = array( $column => $object_id, 'meta_key' => $meta_key );
143
144      if ( !empty( $prev_value ) ) {
145           $prev_value = maybe_serialize($prev_value);
146           $where['meta_value'] = $prev_value;
147      }
148
149      do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
150
151      if ( 'post' == $meta_type )
152           do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
153
154      $wpdb->update( $table, $data, $where );
155
156      wp_cache_delete($object_id, $meta_type . '_meta');
157
158      do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
 
Line Code
421           $data = array(
422                'meta_key' => $meta_key,
423                'meta_value' => $meta_value
424           );
425
426           // Format the where query arguments.
427           $where = array();
428           $where[$id_column] = $meta_id;
429
430           do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
431
432           if ( 'post' == $meta_type )
433                do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
434
435           // Run the update query, all fields in $data are %s, $where is a %d.
436           $result = (bool) $wpdb->update( $table, $data, $where, '%s', '%d' );
437
438           // Clear the caches.
439           wp_cache_delete($object_id, $meta_type . '_meta');