Internet companies need for identity verification more and more common, however small company is unable to dock the public security department of the identity authentication system. Almost all online buy some large Internet companies certification services. Even the cheaper prices of certified reached 10 million times / million. That is a dime once, or very expensive ha. So in order to reduce the company's expenses, we get the identity information submitted by the user should authenticate themselves first before going to test it ID card format, if even the most basic of ID card format is not met, then we can directly rejected, do not go spend the next certification process, and it can also create a user ID table, each certified by the store data up after every start their own system of user identification table query, and then finding out to take the certification process to maximize cost savings the company.
A preliminary verification of the identity card format ID card verification PHP classes here. This class provides only a static method isValidinterface is also very simple to use, only need to use IdentityCard::isValidto verify. You can put your own projects as tools. The method may verify the ID 15 at the same time the old and the new 18-bit format ID
PHP version: >=7.0.0
Note: If the parameter is less than PHP version 7.0 class method only need to use restriction cancel.
class IdentityCard
{
/**
* 校验身份证号是否合法
* @param string $num 待校验的身份证号
* @return bool
*/
public static function isValid(string $num)
{
//老身份证长度15位，新身份证长度18位
$length = strlen($num);
if ($length == 15) { //如果是15位身份证
//15位身份证没有字母
if (!is_numeric($num)) {
return false;
}
// 省市县（6位）
$areaNum = substr($num, 0, 6);
// 出生年月（6位）
$dateNum = substr($num, 6, 6);
} else if ($length == 18) { //如果是18位身份证
//基本格式校验
if (!preg_match('/^\d{17}[0-9xX]$/', $num)) {
return false;
}
// 省市县（6位）
$areaNum = substr($num, 0, 6);
// 出生年月日（8位）
$dateNum = substr($num, 6, 8);
} else { //假身份证
return false;
}
//验证地区
if (!self::isAreaCodeValid($areaNum)) {
return false;
}
//验证日期
if (!self::isDateValid($dateNum)) {
return false;
}
//验证最后一位
if (!self::isVerifyCodeValid($num)) {
return false;
}
return true;
}
/**
* 省市自治区校验
* @param string $area 省、直辖市代码
* @return bool
*/
private static function isAreaCodeValid(string $area) {
$provinceCode = substr($area, 0, 2);
// 根据GB/T2260—999，省市代码11到65
if (11 <= $provinceCode && $provinceCode <= 65) {
return true;
} else {
return false;
}
}
/**
* 验证出生日期合法性
* @param string $date 日期
* @return bool
*/
private static function isDateValid(string $date) {
if (strlen($date) == 6) { //15位身份证号没有年份，这里拼上年份
$date = '19'.$date;
}
$year = intval(substr($date, 0, 4));
$month = intval(substr($date, 4, 2));
$day = intval(substr($date, 6, 2));
//日期基本格式校验
if (!checkdate($month, $day, $year)) {
return false;
}
//日期格式正确，但是逻辑存在问题(如:年份大于当前年)
$currYear = date('Y');
if ($year > $currYear) {
return false;
}
return true;
}
/**
* 验证18位身份证最后一位
* @param string $num 待校验的身份证号
* @return bool
*/
private static function isVerifyCodeValid(string $num)
{
if (strlen($num) == 18) {
$factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
$tokens = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
$checkSum = 0;
for ($i = 0; $i < 17; $i++) {
$checkSum += intval($num{$i}) * $factor[$i];
}
$mod = $checkSum % 11;
$token = $tokens[$mod];
$lastChar = strtoupper($num{17});
if ($lastChar != $token) {
return false;
}
}
return true;
}
}Example of use:
// 测试
$num = '33071919610920021X';
if (IdentityCard::isValid($num)) {
echo '身份证格式正确';
} else {
echo '身份证格式不正确';
}The following is the meaning of the various parts of the identification code:
//=============新的18位身份证号码各位的含义:=======================
//1-2位省、自治区、直辖市代码；11-65
//3-4位地级市、盟、自治州代码；
//5-6位县、县级市、区代码；
//7-14位出生年月日，比如19670401代表1967年4月1日；
//15-17位为顺序号，其中17位男为单数，女为双数；
//18位为校验码，0-9和X，由公式随机产生。
//举例：
//130503 19670401 0012这个身份证号的含义: 13为河北，05为邢台，03为桥西区，出生日期为1967年4月1日，顺序号为001，2为验证码
//===========15位身份证号码各位的含义:=======================
//1-2位省、自治区、直辖市代码；
//3-4位地级市、盟、自治州代码；
//5-6位县、县级市、区代码；
//7-12位出生年月日,比如670401代表1967年4月1日,这是和18位号码的第一个区别；
//13-15位为顺序号，其中15位男为单数，女为双数；
//与18位身份证号的第二个区别：没有最后一位的验证码。
//举例：
//130503 670401 001的含义; 13为河北，05为邢台，03为桥西区，出生日期为1967年4月1日，顺序号为001。