<?php
// check
class CheckCard{// $num为身份证号码，$checkSex：1为男，2为女，不输入为不验证public function checkIdentity($num,$checkSex=''){// 不是15位或不是18位都是无效身份证号if(strlen($num) != 15 && strlen($num) != 18){return false;}// 是数值if(is_numeric($num)){// 如果是15位身份证号if(strlen($num) == 15 ){// 省市县（6位）$areaNum = substr($num,0,6);// 出生年月（6位）$dateNum = substr($num,6,6);// 性别（3位）$sexNum = substr($num,12,3);}else{// 如果是18位身份证号// 省市县（6位）$areaNum = substr($num,0,6);// 出生年月（8位）$dateNum = substr($num,6,8);// 性别（3位）$sexNum = substr($num,14,3);// 校验码（1位）$endNum = substr($num,17,1);}}else{// 不是数值if(strlen($num) == 15){return false;}else{// 验证前17位为数值，且18位为字符x$check17 = substr($num,0,17);if(!is_numeric($check17)){return false;}// 省市县（6位）$areaNum = substr($num,0,6);// 出生年月（8位）$dateNum = substr($num,6,8);// 性别（3位）$sexNum = substr($num,14,3);// 校验码（1位）$endNum = substr($num,17,1);if($endNum != 'x' && $endNum != 'X'){return false;}}}if(isset($areaNum)){if(!$this ->checkArea($areaNum)){return false;}}if(isset($dateNum)){if(!$this ->checkDate($dateNum)){return false;}}// 性别1为男，2为女if($checkSex == 1){if(isset($sexNum)){if(!$this ->checkSex($sexNum)){return false;}}}else if($checkSex == 2){if(isset($sexNum)){if($this ->checkSex($sexNum)){return false;}}}if(isset($endNum)){if(!$this ->checkEnd($endNum,$num)){return false;}}return true;}// 验证城市private function checkArea($area){$num1 = substr($area,0,2);$num2 = substr($area,2,2);$num3 = substr($area,4,2);// 根据GB/T2260—999，省市代码11到65if(10 < $num1 && $num1 < 66){return true;}else{return false;}//============// 对市 区进行验证//============}// 验证出生日期private function checkDate($date){if(strlen($date) == 6){$date1 = substr($date,0,2);$date2 = substr($date,2,2);$date3 = substr($date,4,2);$statusY = $this ->checkY('19'.$date1);}else{$date1 = substr($date,0,4);$date2 = substr($date,4,2);$date3 = substr($date,6,2);$nowY = date("Y",time());if(1900 < $date1 && $date1 <= $nowY){$statusY = $this ->checkY($date1);}else{return false;}}if(0<$date2 && $date2 <13){if($date2 == 2){// 润年if($statusY){if(0 < $date3 && $date3 <= 29){return true;}else{return false;}}else{// 平年if(0 < $date3 && $date3 <= 28){return true;}else{return false;}}}else{$maxDateNum = $this ->getDateNum($date2);if(0<$date3 && $date3 <=$maxDateNum){return true;}else{return false;}}}else{return false;}}// 验证性别private function checkSex($sex){if($sex % 2 == 0){return false;}else{return true;}}// 验证18位身份证最后一位private function checkEnd($end,$num){$checkHou = array(1,0,'x',9,8,7,6,5,4,3,2);$checkGu = array(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2);$sum = 0;for($i = 0;$i < 17; $i++){$sum += (int)$checkGu[$i] * (int)$num[$i];}$checkHouParameter= $sum % 11;if($checkHou[$checkHouParameter] != $num[17]){return false;}else{return true;}}// 验证平年润年，参数年份,返回 true为润年  false为平年private function checkY($Y){if(getType($Y) == 'string'){$Y = (int)$Y;}if($Y % 100 == 0){if($Y % 400 == 0){return true;}else{return false;}}else if($Y % 4 ==  0){return true;}else{return false;}}// 当月天数 参数月份（不包括2月）  返回天数private function getDateNum($month){if($month == 1 || $month == 3 || $month == 5 || $month == 7 || $month == 8 || $month == 10 || $month == 12){return 31;}else if($month == 2){}else{return 30;}}/*** 香港身份证校验* @param string $number 香港身份证号码* @author mosishu* @return array 正确时返回true状态和身份证号码，错误时返回false状态*/public function checkHKIdCard($number){//将中文括号全部替换成英文括号if (strpos($number,"（") || strpos($number,"）")){$number = str_replace('（', '(', $number);$number = str_replace('）', ')', $number);}if(strlen($number)!=10){return array('status'=>false);}$one = substr($number,0,1);//取首字母$two = substr($number,1,1);//取第二位$three = substr($number,2,1);//取第三位$four = substr($number,3,1);//取第四位$five = substr($number,4,1);//取第五位$six = substr($number,5,1);//取第六位$seven = substr($number,6,1);//取第七位$checkCode = substr($number,-2,1);//取括号内的校验码$sixNum = substr($number, 1,6);//取中间六位数字if (preg_match('/^[A-Z]+$/', $one)){//第一位要是大写字母if ( is_numeric($sixNum)){//中间六位要是数字$sum = $this->letterNum[$one]*8+$two*7+$three*6+$four*5+$five*4+$six*3+$seven*2;$residue = $sum%11;if ($residue==1){$checkIdCode='A';}elseif($residue==0){$checkIdCode=0;}else{$checkIdCode=11-$residue;}if ($checkCode==$checkIdCode){return array('status'=>true,'sfz_id'=>$number);}else{return array('status'=>false);}}else{return array('status'=>false);}}else{return array('status'=>false);}}//香港身份证首字母对应的数字private $letterNum = array('A'=>1,'B'=>2,'C'=>3,'D'=>4,'E'=>5,'F'=>6,'G'=>7,'H'=>8,'I'=>9,'J'=>10,'K'=>11,'L'=>12,'M'=>13,'N'=>14,'O'=>15,'P'=>16,'Q'=>17,'R'=>18,'S'=>19,'T'=>20,'U'=>21,'V'=>22,'W'=>23,'X'=>24,'Y'=>25,'Z'=>26,);}

调用过程如下，我这里用的是Thinkphp框架：

        //验证身份证合法性vendor('CheckCard.CheckCard');$CheckCard=new \CheckCard();$idCode = $CheckCard->checkIdentity($sfz_id);$HKCode = $CheckCard->checkHKIdCard($sfz_id);if(!$idCode && !$HKCode['status']){$this->error('身份证不合法,请重试！');}