正则表达式在遇到新的时候将会不断更新

include "<span style="font-family: Consolas, 'Courier New', Courier, mono, serif; line-height: 18px;">ValidateParameterConfig.php</span>";

class Validation 
{	
	private static function getRexp($rexp) 
	{
		$_rexp = array (
			'letter_number'=>'/^[0-9A-Za-z]+$/',//只有字母数字包括大小写
			'account'=>'/^[0-9A-Za-z_]+$/',//只有字母数字下划线包括大小写
			'ids'=>'/^[0-9]+(\,[0-9]+)*$/',//验证多个id以','分割的类型 例如'1,2,3,4,5'
			'number'=>'/^[0-9]+$/',//只可以使数字
			'personal_card'=>'/^[0-9A-Za-z]+$/',//身份证
			'email'=>'/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/',//邮箱
			'date'=>'/^((((19|20)\d{2})-(0?(1|[3-9])|1[012])-(0?[1-9]|[12]\d|30))|(((19|20)\d{2})-(0?[13578]|1[02])-31)|(((19|20)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|((((19|20)([13579][26]|[2468][048]|0[48]))|(2000))-0?2-29))$/'//日期，包含了闰年
		);

		if (isset($_rexp[$rexp])) {
			return $_rexp[$rexp];
		} else {
			return $rexp_not_defind;
		}
	}

	public static function validate($data, $config) 
	{
		$_config = ValidateParameterConfig::getConfig($config);
		
		$k = self::allowExist($data, $_config);
		if ($k !== null) {
			return $k;
		}
		
		foreach($_config as $k=>$c) {
			if (isset($data[$k]))
			{
				if(isset($c['rexp']))
				{
					if (self::vRexp( $data[$k], $c['rexp']) === false) {
						return $k;
					}
				}
				
				if (isset($c['length'])) 
				{
					if (self::vLength($data[$k], $c['length']))
					{
						return $k;
					} 
				}
				
				if (isset($c['min_length'])) 
				{
					if (!self::vMinLength($data[$k], $c['min_length']))
					{
						return $k;
					} 
				}
				
				if (isset($c['max_length'])) 
				{
					if (!self::vMaxLength($data[$k], $c['max_length']))
					{
						return $k;
					} 
				}
			}
		}
		
		return null;
	}
	
	private static function allowExist($data, $config)
	{
		foreach ($config as $k=>$v) 
		{
			if (!isset($v['allow_exist']) || $v['allow_exist'] == true) {
				if (!isset($data[$k]))
				{
					return $k;
				}
			}
		}
		return null;
	}
	
	public static function vRexp($data, $rexp) {
		$_rexp = self::getRexp($rexp);
		if (preg_match($_rexp, $data) == false) {
				return false;
		}
		return true;
	}
	
	public static function vLength($data, $l) {
		if (strlen(trim($data)) == $l) {
				return false;
		}
		return true;
	}

	public static function vMinLength($data, $l) {
		if (strlen(trim($data)) < $l) {
				return false;
		}
		return true;
	}
	
	public static function vMaxLength($data, $l) {
		if (strlen(trim($data)) > $l) {
				return false;
		}
		return true;
	}
	
	public static function vLetterNumber($data) {
		if (preg_match(self::getRexp('letter_number'), $data) == false) {
				return false;
		}
		return true;
	}
	
	public static function vLetterNumber_($data) {
		if (preg_match(self::getRexp('letter_number_'), $data) == false) {
				return false;
		}
		return true;
	}
	
	public static function vNumber($data) {
		if (preg_match(self::getRexp('number'), $data) == false) {
				return false;
		}
		return true;
	}
	
	public static function vEmail($data) {
		if (preg_match(self::getRexp('email'), $data) == false) {
				return false;
		}
		return true;
	}

class ValidateParameterConfig 
{
	public static function getConfig ($key) 
	{
		//'allow_exist'=>true或allow_exist不存在表示该参数必传
		$_config = array(
			'test'=>array(
				'letter_number'=>array('rexp'=>'letter_number', 'allow_exist'=>true),
				'number'=>array('rexp'=>'number', 'min_length'=>1<span style="font-family: Arial, Helvetica, sans-serif;">'allow_exist'=>false</span>),
				'account'=>array('rexp'=>'account', 'max_length'=>20),
			)
		);

		if (isset($_config[$key])) {
			return $_config[$key];
		} else {
			return $config_not_defind;
		}
	}
}

从应用端发过来的参数为

$arr = array('letter_number'=>'abc123', 'account'=>'acb1234_');
//参数验证
$_msg = Validation::validate($arr, 'test');
if ($_msg !== null) {
	return $_msg . ' is invalid parameter';
}