recursively deleting directory with sub-directories and files using SPL in PHP

SPL_delete_dir.php

    function recursiveDelDirecoty( $dir, $delMe = FALSE ) {
        $dir = realpath( $dir );
        try{
            $it = new RecursiveIteratorIterator( new RecursiveDirectoryIterator( $dir, RecursiveDirectoryIterator::SKIP_DOTS ), RecursiveIteratorIterator::CHILD_FIRST );
            foreach( $it as $i ) {
                if ( $i->isDir() ) {
                    rmdir( $i->getRealPath() );
                    echo "删除". $i . "目录成功";
                }else{
                    unlink( $i->getRealPath() );
                    echo "删除". $i . "文件成功";
                }
            }
        }catch( Exception $e ) {
            echo $e->getMessage();
        }

        if ( $delMe == TRUE ) {
            rmdir( $dir );
            echo "删除". $dir . "目录成功";
        }
        
    }