PHP校验身份证号码是否合法

1/**
2     * 校验身份证号码是否合法
3     * @param $str
4     * @param bool $getBasicInfo 是否提取身份证号码中的基本信息(出生日期/性别)
5     * @return mixed
6     */
7    public static function RegexpMatchIdCard($str, $getBasicInfo = false)
8    {
9        //校验身份证位数和出生日期部分
10        $pattern = "/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|[xX])$/";
11        preg_match($pattern, $str, $match);
12        $result = $match ? true : false;
13        if (!$result) {
14            return false;
15        }
16
17        //校验前两位是否是所有省份代码
18        $province_code = ['11', '12', '13', '14', '15', '21', '22', '23', '31', '32', '33', '34', '35', '36', '37', '41', '42', '43', '44', '45', '46', '50', '51', '52', '53', '54', '61', '62', '63', '64', '65', '71', '81', '82', '91'];
19        if (!in_array(substr($str, 0, 2), $province_code)) {
20            return false;
21        }
22
23        //校验身份证最后一位
24        $ahead17_char = substr($str, 0, 17);
25        $last_char = substr($str, -1);
26        $factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); // 前17位的权重
27        $c = array(1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2); //模11后的对应校验码
28        $t_res = 0;
29        for ($i = 0; $i < 17; $i++) {
30            $t_res += intval($ahead17_char[$i]) * $factor[$i];
31        }
32        $calc_last_char = $c [$t_res % 11];
33        if ($last_char != $calc_last_char) {
34            return false;
35        }
36
37        if (!$getBasicInfo) {
38            return $result;
39        }
40
41        //从身份证号码中提取出生日期和性别
42        $birth_year = substr($str, 6, 4);
43        $birth_month = substr($str, 10, 2);
44        $birth_day = substr($str, 12, 2);
45        if (!checkdate($birth_month, $birth_day, $birth_year)) {
46            return false;
47        }
48        $brithday = $birth_year . "-" . $birth_month . "-" . $birth_day;
49        $gender_char = substr($str, -2, 1);
50        if ($gender_char % 2 == 0) {
51            $gender = 2; //女
52        } else {
53            $gender = 1; //男
54        }
55
56        return [
57            'birthday' => $brithday,
58            'age' => self::getAge(strtotime($brithday)),
59            'gender' => $gender,
60        ];
61    }
62
63    /**
64     * 根据出生日期获取年龄
65     * @param string $birthday 出生日期时间戳
66     * @return false|string
67     */
68    public static function getAge($birthday)
69    {
70        //格式化出生时间年月日
71        $byear = date('Y', $birthday);
72        $bmonth = date('m', $birthday);
73        $bday = date('d', $birthday);
74
75        //格式化当前时间年月日
76        $tyear = date('Y');
77        $tmonth = date('m');
78        $tday = date('d');
79
80        //计算年龄
81        $age = $tyear - $byear;
82        if ($bmonth > $tmonth || $bmonth == $tmonth && $bday > $tday) {
83            $age--;
84        }
85        return $age;
86    }