Ticket #64507: author_name_string.patch

wp-includes/class-wp-query.php

@@ -2418 +2418 @@
 
                 // Author stuff for nice URLs.
 
-                if ( '' !== $query_vars['author_name'] ) {
+                if ( '' !== $query_vars['author_name'] && is_string( $query_vars['author_name'] ) ) {
                         if ( str_contains( $query_vars['author_name'], '/' ) ) {
                                 $query_vars['author_name'] = explode( '/', $query_vars['author_name'] );
                                 if ( $query_vars['author_name'][ count( $query_vars['author_name'] ) - 1 ] ) {
@@ -4039 +4039 @@
                         $this->queried_object_id = (int) $this->post->ID;
                 } elseif ( $this->is_author ) {
                         $author      = (int) $this->get( 'author' );
-                        $author_name = $this->get( 'author_name' );
+                        $author_name = ( is_string( $this->get( 'author_name' ) ) ) ? $this->get( 'author_name' ) :  false;
 
                         if ( $author ) {
                                 $this->queried_object_id = $author;