Algis Alekna

Here is a nice recursive function that returns the list of files in a folder. If the folder contains subfolders, it will return the names with their relative path. Optionally you can supply a file type (extension) which you would like to consider, for example, return only .jpg or .php files.

function getDirListing( $dirName, $ext = '.php' ){
	$dirLising = array();

	$files = array();
	$dirs = array();

	if ! ( $handle = opendir($dirName) )
		return $dirLising;

	// read the folder file list
	while ( false !== ($f = readdir($handle)) ){
		// skip the dot pseudo folders
		if( substr($f, 0, 1) == '.' )
			continue;

		// check if it is our extension
		$thisExt = substr( $f, -strlen($ext) );
		if ( ($ext == $thisExt) && ($f != basename(__FILE__)) )
			$files[] = $f;

		// subfolder? save for later recursive call
		if( is_dir( $dirName . '/' . $f ) )
			$dirs[] = $f;
		}
	closedir($handle);

	$dirLising = $files;
	// now go through subfolders if any
	reset( $dirs );
	foreach( $dirs as $d ){
		$childListing = getDirListing( $dirName . '/' . $d );
		foreach( $childListing as $childFile )
			$dirLising[] = $d . '/' . $childFile;
		}

	sort( $dirLising );
	return $dirLising;
	}