A good PHP validation class

        /**
 * Verification class
 *
 * @lastmodify 2014-5-16
 * @author jy625
*/
    class VerifyAction{
        /**
 * Whether it is a null value
*/
        public static function isEmpty($str){
            $str = trim($str);
            return !empty($str) ? true : false;
        }
        /**
 * Number verification
 * param:$flag: whether int is an integer and float is a floating point type
*/
        public static function isNum($str,$flag = 'float'){
            if(!self::isEmpty($str)) return false;
            if(strtolower($flag) == 'int'){
                return ((string)(int)$str === (string)$str) ? true : false;
            }else{
                return ((string)(float)$str === (string)$str) ? true : false;
            }
        }
        /**
 * Name matching, such as user name, directory name, etc.
 * @param:string $str The string to be matched
 * @param:$chinese Whether to support Chinese, supported by default. If it is matching file names, it is recommended to turn this off ( false)
 * @param:$charset encoding (default utf-8, supports gb2312)
*/
        public static function isName($str,$chinese = true,$charset = 'utf-8'){
            if(!self::isEmpty($str)) return false;
            if($chinese){
                $match = (strtolower($charset) == 'gb2312') ? "/^[".chr(0xa1)."-".chr(0xff)."A-Za-z0-9_-]+$/" : "/^[x{4e00}-x{9fa5}A-Za-z0-9_]+$/u";
            }else{
                $match = '/^[A-za-z0-9_-]+$/';
            }
            return preg_match($match,$str) ? true : false;
        }
        /**
 * Email verification
*/
        public static function isEmail($str){
            if(!self::isEmpty($str)) return false;
            return preg_match("/([a-z0-9]*[-_.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[.][a-z]{2,3}([.][a-z]{2})?/i",$str) ? true : false;
        }
        //手机号码验证
        public static function isMobile($str){
            $exp = "/^13[0-9]小贝[0-9]{8}$|15[012356789]小贝[0-9]{8}$|18[012356789]小贝[0-9]{8}$|14[57]小贝[0-9]$/";
            if(preg_match($exp,$str)){
                return true;
            }else{
                return false;
            }
        }
        /**
 * URL verification, pure URL format, does not support IP verification
*/
        public static function isUrl($str){
            if(!self::isEmpty($str)) return false;
            return preg_match('#(http|https|ftp|ftps)://([w-]+.)+[w-]+(/[w-./?%&=]*)?#i',$str) ? true : false;
        }
        /**
 * Verify Chinese
 * @param:string $str The string to be matched
 * @param:$charset encoding (default utf-8, support gb2312)
*/
        public static function isChinese($str,$charset = 'utf-8'){
            if(!self::isEmpty($str)) return false;
            $match = (strtolower($charset) == 'gb2312') ? "/^[".chr(0xa1)."-".chr(0xff)."]+$/"
            : "/^[x{4e00}-x{9fa5}]+$/u";
            return preg_match($match,$str) ? true : false;
        }
        /**
 * UTF-8 validation
*/
        public static function isUtf8($str){
            if(!self::isEmpty($str)) return false;
            return (preg_match("/^([".chr(228)."-".chr(233)."]小贝[".chr(128)."-".chr(191)."]小贝[".chr(128)."-".chr(191)."]小贝)小贝/",$word)
            == true || preg_match("/([".chr(228)."-".chr(233)."]小贝[".chr(128)."-".chr(191)."]小贝[".chr(128)."-".chr(191)."]小贝)小贝$/",$word)
            == true || preg_match("/([".chr(228)."-".chr(233)."]小贝[".chr(128)."-".chr(191)."]小贝[".chr(128)."-".chr(191)."]小贝){2,}/",$word)
            == true) ? true : false;
        }
        /**
 * Verification length
 * @param: string $str
 * @param: int $type (method, default min <= $str <= max)
 * @param: int $min, minimum value; $max, Maximum value;
 * @param: string $charset character
*/
        public static function length($str,$type=3,$min=0,$max=0,$charset = 'utf-8'){
            if(!self::isEmpty($str)) return false;
            $len = mb_strlen($str,$charset);
            switch($type){
                case 1: //只匹配最小值
                    return ($len >= $min) ? true : false;
                    break;
                case 2: //只匹配最大值
                    return ($max >= $len) ? true : false;
                    break;
                default: //min <= $str <= max
                    return (($min <= $len) && ($len <= $max)) ? true : false;
            }
        }
        /**
 * Verification password
 * @param string $value
 * @param int $length
 * @return boolean
*/
        public static function isPWD($value,$minLen=6,$maxLen=16){
            $match='/^[\~!@#$%^&*()-_=+|{}
    ,.?/:;'"dw]{'.$minLen.','.$maxLen.'}$/';
            $v = trim($value);
            if(empty($v))
                return false;
            return preg_match($match,$v);
        }
        /**
 * Verify username
 * @param string $value
 * @param int $length
 * @return boolean
*/
        public static function isNames($value, $minLen=2, $maxLen=16, $charset='ALL'){
            if(empty($value))
                return false;
            switch($charset){
                case 'EN': $match = '/^[_wd]{'.$minLen.','.$maxLen.'}$/iu';
                    break;
                case 'CN':$match = '/^[_x{4e00}-x{9fa5}d]{'.$minLen.','.$maxLen.'}$/iu';
                    break;
                default:$match = '/^[_wdx{4e00}-x{9fa5}]{'.$minLen.','.$maxLen.'}$/iu';
            }
            return preg_match($match,$value);
        }
        /**
 * Verification email
 * @param string $value
*/
        public static function checkZip($str){
            if(strlen($str)!=6){
                return false;
            }
            if(substr($str,0,1)==0){
                return false;
            }
            return true;
        }
        /**
 * Match date
 * @param string $value
*/
        public static function checkDate($str){
            $dateArr = explode("-", $str);
            if (is_numeric($dateArr[0]) && is_numeric($dateArr[1]) && is_numeric($dateArr[2])) {
            if (($dateArr[0] >= 1000 && $timeArr[0] <= 10000) && ($dateArr[1] >= 0 && $dateArr[1] <= 12) && ($dateArr[2] >= 0 && $dateArr[2] <= 31))
                return true;
            else
                return false;
            }
            return false;
        }
        /**
 * Matching time
 * @param string $value
*/
        public static function checkTime($str){
            $timeArr = explode(":", $str);
            if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric($timeArr[2])) {
            if (($timeArr[0] >= 0 && $timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59))
                return true;
            else
                return false;
            }
            return false;
        }
    }

很好, PHP