身份证格式验证

Jsky
2020-09-10 19:53:19
PHP
PHP Thinkphp

/**
 * 验证身份证格式
 * @param string $card
 * @return bool
 */
function varifiCard($card=''){
    //将身份证转化为string
    $cardStr = (string)$card;
    //验证身份证长度是否为18位
    if(strlen($cardStr)==18){
//           验证格式是否正确
        $pattern = "/\d{6}(18|19|20)?\d{2}(0[1-9]|1[12])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)/i";
        if(preg_match($pattern,$cardStr)){
            //匹配前两位所对应的地区是否正确
//               $city = array('11'=>'北京','12'=>'天津','13'=>'河北','14'=>'山西','15'=>'内蒙古','21'=>'辽宁','22'=>'吉林','23'=>'黑龙江','31'=>'上海','32'=>'江苏','33'=>'浙江','34'=>'安徽','35'=>'福建','36'=>'江西','37'=>'山东','41'=>'河南','42'=>'湖北','43'=>'湖南','44'=>'广东','45'=>'广西','46'=>'海南','50'=>'重庆','51'=>'四川','52'=>'贵州','53'=>'云南','54'=>'西藏','61'=>'陕西','62'=>'甘肃','63'=>'青海','64'=>'宁夏','65'=>'新疆','71'=>'台湾','81'=>'香港','82'=>'澳门','91'=>'国外');
            $city = array(11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51,52,53,54,61,62,63,64,65,71,81,82,91);
            if(in_array(substr($cardStr,0,2),$city)){
                //计算加权因子 结果为7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2
                for($i=18;$i>1;$i--){
                    $factor[] = fmod(pow(2,$i-1),11);
                }
                //校验位
                $parity = array('1','0','X','9','8','7','6','5','4','3','2');
                //将加权因子和身份证号对应相乘,再求和
                $sum = 0;
                for($i=0;$i<count($factor);$i++){
                    $sum +=$factor[$i]*$cardStr[$i];
                }
                //将sum对11求余
                $mod = fmod($sum,11);
//                   如果校验位的第$mod位与身份证最后一位相等,则身份证验证通过
                if($parity[$mod]==substr($cardStr,-1,1)){
                    return true;
                }
            }
        }
    }
    return false;
}

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