Ticket #17877: 17877.3.diff

src/wp-includes/general-template.php

@@ -836 +836 @@
         if ( !empty($title) )
                 $prefix = " $sep ";
 
+        /**
+         * Filter the parts of the document title.
+         *
+         * @since 4.0.0
+         *
+         * @param array $title_array Parts of the document title.
+         */
+        $title_array = apply_filters( 'wp_title_parts', explode( $t_sep, $title ) );
+
         // Determines position of the separator and direction of the breadcrumb
         if ( 'right' == $seplocation ) { // sep on right, so reverse the order
-                $title_array = explode( $t_sep, $title );
                 $title_array = array_reverse( $title_array );
                 $title = implode( " $sep ", $title_array ) . $prefix;
         } else {
-                $title_array = explode( $t_sep, $title );
                 $title = $prefix . implode( " $sep ", $title_array );
         }