我在使用某个插件的地图窗口小部件的页面上收到错误消息：
Warning: explode() expects parameter 2 to be string, array given in
/usr/www/users/mednukptke/wordpress/wp-content/themes/jobify/inc/integrations/wp-job-manager/widgets/class-widget-jobs-map.php on line 111
Warning: array_map(): Argument #2 should be an array in
/usr/www/users/mednukptke/wordpress/wp-content/themes/jobify/inc/integrations/wp-job-manager/widgets/class-widget-jobs-map.php on line 111
我打开了那个特定文件，第111行读取
$center = isset( $instance[ 'center' ] ) && '' != $instance[ 'center' ] ? array_map( 'trim', explode( ',', $instance[ 'center' ] ) ) : 'autofit';
任何人都可以请告诉我需要更改以消除该错误消息吗？
谢谢！