//身份证号验证 protected function checkIdCard(){ if(empty($_POST['idcard'])){ return false; } $idcard = $_POST['idcard']; $City = array(11=>"北京",12=>"天津",13=>"河北",14=>"山西",15=>"内蒙古",21=& gt;"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"); $iSum = 0; $idCardLength = strlen($idcard); //长度验证 if(!pregmatch('/^d{17}(d|x)$/i',$idcard) and !pregmatch('/^d{15}$/i',$idcard)) { return false; } //地区验证 if(!arraykeyexists(intval(substr($idcard,0,2)),$City)) { return false; } // 15位身份证验证生日，转换为18位 if ($idCardLength == 15) { $sBirthday = '19'.substr($idcard,6,2).'-'.substr($idcard,8,2).'-'.substr($idcard,10,2); $d = new DateTime($sBirthday); $dd = $d->format('Y-m-d'); if($sBirthday != $dd) { return false; } $idcard = substr($idcard,0,6)."19".substr($idcard,6,9);//15to18 $Bit18 = getVerifyBit($idcard);//算出第18位校验码 $idcard = $idcard.$Bit18; } // 判断是否大于2078年，小于1900年 $year = substr($idcard,6,4); if ($year<1900 || $year>2078 ) { return false; }

 //18位身份证处理
    $sBirthday = substr($idcard,6,4).'-'.substr($idcard,10,2).'-'.substr($idcard,12,2);
    $d = new DateTime($sBirthday);
    $dd = $d->format('Y-m-d');
    if($sBirthday != $dd)
     {
        return false;
     }
    //身份证编码规范验证
    $idcard_base = substr($idcard,0,17);
    if(strtoupper(substr($idcard,17,1)) != getVerifyBit($idcard_base))
    {
       return false;
    }
    return $_POST['idcard'];
}

// 计算身份证校验码，根据国家标准GB 11643-1999
function getVerifyBit($idcard_base)
{
    if(strlen($idcard_base) != 17)
    {
        return false;
    }
    //加权因子
    $factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
    //校验码对应值
    $verify_number_list = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
    $checksum = 0;
    for ($i = 0; $i < strlen($idcard_base); $i++)
    {
        $checksum += substr($idcard_base, $i, 1) * $factor[$i];
    }
    $mod = $checksum % 11;
    $verify_number = $verify_number_list[$mod];
    return $verify_number;
}