php身份证校验

<?php
/*
 * 校验规则是：
 * （1）十七位数字本体码加权求和公式 
 * S = Sum(Ai * Wi), i = 0, ... , 16 ，先对前17位数字的权求和 
 * Ai:表示第i位置上的身份证号码数字值 
 * Wi:表示第i位置上的加权因子 
 * Wi: 7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2 
 * （2）计算模 
 * Y = mod(S, 11) 
 * （3）通过模得到对应的校验码 
 * Y: 0 1 2 3 4 5 6 7 8 9 10 
 * 校验码: 1 0 X 9 8 7 6 5 4 3 2
 * 也就是说，如果得到余数为1则最后的校验位p应该为对应的0.如果校验位不是，则该身份证号码不正确。
 * */
class cardCheack{
	static private $powers = array('7','9','10','5','8','4','2','1','6','3','7','9','10','5','8','4','2');   #17
	static private $parityBit = array('1','0','X','9','8','7','6','5','4','3','2');
	static public function validId($cardno='')
	{
		$ret = array('isvalid'=>'', 'msg'=>'');
		if(empty($cardno)){
			return $ret;
		}
		switch(strlen($cardno)){
		case 15:
			$ret= self::validId15($cardno);	break;
		case 18:
			$ret= self::validId18($cardno);	break;
		default:
			return array(
				'isvalid'=>false,
				'msg'=>'',
			);
		}
		return $ret;
	}
	#18bit身份证号校验
	#@param: 	 cardno 身份证号
	#@return: 	 true, false
	static public function  validId18($cardno='')
	{
		$_ret = array();
		$_cardno = $cardno.'';
		$_num = substr($cardno, 0, 17);
		$_parityBit = (int)substr($cardno, 17);
		$_powers = 0;
		for($i = 0; $i < 17; $i++){
			if($_num[$i] < '0' || $_num[$i] > '9'){
				return array(
					'isvalid'=>false,
					'msg'=>'',
				);
				break;
			}else{
				#加权
				$_powers += intval($_num[$i])*intval(self::$powers[$i]);
				#性别
				if($i==16 && intval($_num[$i])%2==0){
					$_ret['msg'] = 'female';
				}else{
					$_ret['msg'] = 'male';
				}
			}
		}
		#校验
		$mod = intval($_powers)%11;
		$_ret['isvalid'] = (strtoupper(self::$parityBit[$mod])==$_parityBit) ? true: false;
		return $_ret;	
	}
	#15bit身份证号校验
	#@param: 	 cardno 身份证号
	#@return: 	 true, false
	public function validId15($cardno=''){
		$cardno = $cardno.'';	
		$len = strlen($cardno);
		for($i=0; $i<$len; $i++){
			if($cardno[$i] < '0' || $carno[$i] > '9'){
				return array(
					'isvalid'=>false,
					'msg'=>'',
				);
				break;
			}
		}
		$_year = substr($cardno, 6, 2);
		$_month = substr($cardno, 8, 2);
		$_day = substr($cardno, 10, 2);
		$_sexbit= substr($cardno, 14);
		#校验年份
		if($_year < '01' || $_year > '90'){ 
			return array(
				'isvalid'=>false,
				'msg'=>'',
			);
		}
		if($_month < '01' || $_month > '12'){
			return array(
				'isvalid'=>false,
				'msg'=>'',
			);
		}
		if($_day < '01' || $_day> '31') {
			return array(
				'isvalid'=>false,
				'msg'=>'',
			);
		}
		#设置性别
		return array(
			'isvalid'=>true,
			'msg'=>!!$_sexbit%2? 'male': 'felmale',
		);
	}
}
/*$obj = new cardCheack();
var_dump($obj->validId('412728198610110071'));
 */
var_dump(cardCheack::validId('412728198610110071'));

来自为知笔记(Wiz)