PHP deletes a directory and all subordinate directories and file codes within the directory

 //PHP deletes the directory and all subordinate directories and file codes in the directory
 function delDir( $dirName='' ){
 if ( $handle = opendir( "$dirName" ) ) {
 while ( false ! == ( $item = readdir( $handle ) ) ) {
 if ( $item != "." && $item != ".." ) {
 if ( is_dir( "$dirName/$item" ) ) {
 $this->delDir( "$dirName/$item" );
 } else {
 unlink( "$dirName/$item" );
 }
 }
 }
 closedir( $handle );
 }
 }

 delDir('directory');

PHP