php: functions to read files from directory and filter them

gistfile1

/**
 * list all files in a directory & subdirectory
 * @param  string $directory path to dir
 * @param  boolean $recursive weather recurisve listing or not
 * @return array  list of contents in dir
 */
function directoryToArray($directory, $recursive=false) {
	$array_items = array();
	if ($handle = opendir($directory)) {
		while (false !== ($file = readdir($handle))) {
			if ($file != "." && $file != "..") {
				if (is_dir($directory. "/" . $file)) {
					if($recursive) {
						$array_items = array_merge($array_items, directoryToArray($directory. "/" . $file, $recursive));
					}
					$file = $directory . "/" . $file;
					$array_items[] = preg_replace("/\/\//si", "/", $file);
				} else {
					$file = $directory . "/" . $file;
					$array_items[] = preg_replace("/\/\//si", "/", $file);
				}
			}
		}
		closedir($handle);
	}
	return $array_items;
}

/**
 * this function filters an array of files for video files
 * @param  array $filesArray array of files
 * @return array filtered video files
 */
function filter_video_files($filesArray) {
	$files = array();
	if(is_array($filesArray) && count($filesArray)>0) {
		foreach($filesArray as $file) {
			if(strstr($file, '.flv') || strstr($file, '.mp4')) {
				$files[] = $file;
			}
		}
		return $files;
	}
	return false;
}


// this function generates post title from file name
function get_title_from_file($file) {
	$fileName = explode("/", $file);
	$fileCount = count($fileName);
	if($fileCount>1){
		$last = $fileCount-1;
	} else {
		$last = 0;
	}
	$fileName = $fileName[$last];
	$fileName = explode(".", $fileName);
	$fileName = $fileName[0];
	$fileName = explode("_",$fileName);
	$fileName = implode(" ", $fileName);
	$fileName = ucwords($fileName);
	return $fileName;
}