PHP reading of sub directories for files using recursion and generators.

example.php

<?php
// using generators (yield) to recursively read files from a source path
// more: http://www.php.net/manual/en/language.generators.php

foreach (readFileSubDir('~/testdir') as $fileItem) {
	echo($fileItem . "\n");
}


function readFileSubDir($scanDir) {

	$handle = opendir($scanDir);

	while (($fileItem = readdir($handle)) !== false) {
		// skip '.' and '..'
		if (($fileItem == '.') || ($fileItem == '..')) continue;
		$fileItem = rtrim($scanDir,'/') . '/' . $fileItem;

		// if dir found call again recursively
		if (is_dir($fileItem)) {
			foreach (readFileSubDir($fileItem) as $childFileItem) {
				yield $childFileItem;
			}

		} else {
			yield $fileItem;
		}
	}

	closedir($handle);
}

thanks for the code!