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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
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.
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 { |