WooYun.org

public static function act($str,$type = 'string',$limitLen = false)
	{
		if(is_array($str))
		{
			$resultStr = array();
			foreach($str as $key => $val)
			{
				$key = self::act($key, $type, $limitLen);
				$val = self::act($val, $type, $limitLen);
				$resultStr[$key] = $val;
			}
			return $resultStr;
		}
		else
		{
			switch($type)
			{
				case "int":
					return intval($str);
					break;
				case "float":
					return floatval($str);
					break;
				case "text":
					return self::text($str,$limitLen);
					break;
				case "bool":
					return (bool)$str;
					break;
				case "url":
					return self::clearUrl($str);
					break;
				case "filename":
					return self::fileName($str);
					break;
				case "strict":
					return self::strict($str);

public static function strict($string)
	{
		if(preg_match("|^[\w\.\s\-<>=\!\x{4e00}-\x{9fa5}]+$|u",$string) == true)
		{
			return $string;
		}
		return '';
	}