PHP: Simplest way to delete a folder (including its contents)

Question

The rmdir() function fails if the folder contains any files. I can loop through all of the the files in the directory with something like this:

Answer 1

This fuction delete the directory and all subdirectories and files:

function DelDir($target) {
    if(is_dir($target)) {
        $files = glob( $target . '*', GLOB_MARK ); //GLOB_MARK adds a slash to directories returned

        foreach( $files as $file )
        {
            DelDir( $file );      
        }

        rmdir( $target );
    } elseif(is_file($target)) {
        unlink( $target );  
    }
}