Themes: Prevent PHP notice thrown in wp_title_parts.

joedolson · joedolson · commit 79b5b5da3547 · 2025-10-31T23:21:37.000Z
The value passed to the `wp_title_parts` filter is run through `explode()`, but can be empty. This throws a PHP notice. If value of `$title` is empty, return an empty array without exploding. Props nexbridge, dhruvang21, tussendoor, michaelreetz, o-o, beee, sabernhardt, sirlouen, nimeshatxecurify, westonruter, sirlouen. Fixes #61352. git-svn-id: https://develop.svn.wordpress.org/trunk@61108 602fd350-edb4-49c9-b593-d223f7449a82
diff --git a/src/wp-includes/general-template.php b/src/wp-includes/general-template.php
@@ -1436,7 +1436,7 @@ function wp_title( $sep = '&raquo;', $display = true, $seplocation = '' ) {
 	 *
 	 * @param string[] $title_array Array of parts of the page title.
 	 */
-	$title_array = apply_filters( 'wp_title_parts', explode( $t_sep, $title ) );
+	$title_array = apply_filters( 'wp_title_parts', ! empty( $title ) ? explode( $t_sep, $title ) : array() );
 
 	// Determines position of the separator and direction of the breadcrumb.
 	if ( 'right' === $seplocation ) { // Separator on right, so reverse the order.

Original file line number	Diff line number	Diff line change
`@@ -1436,7 +1436,7 @@ function wp_title( $sep = '»', $display = true, $seplocation = '' ) {`
`1436`	`1436`	`*`
`1437`	`1437`	`* @param string[] $title_array Array of parts of the page title.`
`1438`	`1438`	`*/`
`1439`		`- $title_array = apply_filters( 'wp_title_parts', explode( $t_sep, $title ) );`
	`1439`	`+ $title_array = apply_filters( 'wp_title_parts', ! empty( $title ) ? explode( $t_sep, $title ) : array() );`
`1440`	`1440`
`1441`	`1441`	`// Determines position of the separator and direction of the breadcrumb.`
`1442`	`1442`	`if ( 'right' === $seplocation ) { // Separator on right, so reverse the order.`