发布于:2023-12-01 11:26:37
/**
* 身份证验证
* @param $card
* @return bool
*/
function check_card($card)
{
$city = [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 "];
$tip = "";
$match = "/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/";
$pass = true;
if (!$card || !preg_match($match, $card)) {
//身份证格式错误
$pass = false;
} else if (!$city[substr($card, 0, 2)]) {
//地址错误
$pass = false;
} else {
//18位身份证需要验证最后一位校验位
if (strlen($card) == 18) {
$card = str_split($card);
//∑(ai×Wi)(mod 11)
//加权因子
$factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
//校验位
$parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2];
$sum = 0;
$ai = 0;
$wi = 0;
for ($i = 0; $i < 17; $i++) {
$ai = $card[$i];
$wi = $factor[$i];
$sum += $ai * $wi;
}
$last = $parity[$sum % 11];
if ($parity[$sum % 11] != $card[17]) {
// $tip = "校验位错误";
$pass = false;
}
} else {
$pass = false;
}
}
if (!$pass) return false;/* 身份证格式错误*/
return true;/* 身份证格式正确*/
}
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