Source View: wp_unique_post_slug_is_bad_hierarchical_slug

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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
3123           }
3124      } elseif ( in_array( $post_type, $hierarchical_post_types ) ) {
3125           if ( 'nav_menu_item' == $post_type )
3126                return $slug;
3127           // Page slugs must be unique within their own trees. Pages are in a separate
3128           // namespace than posts so page slugs are allowed to overlap post slugs.
3129           $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( '" . implode( "', '", esc_sql( $hierarchical_post_types ) ) . "' ) AND ID != %d AND post_parent = %d LIMIT 1";
3130           $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID, $post_parent ) );
3131
3132           if ( $post_name_check || in_array( $slug, $feeds ) || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug )  || apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ) ) {
3133                $suffix = 2;
3134                do {
3135                     $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
3136                     $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID, $post_parent ) );
3137                     $suffix++;
3138                } while ( $post_name_check );
3139                $slug = $alt_post_name;
3140           }
3141      } else {