Source View: update_postmeta

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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

Line Code
737
738      $post_id = $wpdb->get_var( $wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_id = %d", $meta_id) );
739
740      $meta_value = maybe_serialize( stripslashes_deep( $meta_value ) );
741      $meta_id = (int) $meta_id;
742
743      $data  = compact( 'meta_key', 'meta_value' );
744      $where = compact( 'meta_id' );
745
746      do_action( 'update_postmeta', $meta_id, $post_id, $meta_key, $meta_value );
747      $rval = $wpdb->update( $wpdb->postmeta, $data, $where );
748      wp_cache_delete($post_id, 'post_meta');
749      do_action( 'updated_postmeta', $meta_id, $post_id, $meta_key, $meta_value );
750
751      return $rval;
752 }
753
754 //
755 // Private