<?php
//①1-2
//②3-4
//③5-6
//④7-10 11-12 13-14 、 、
//⑤15-17 , 、 、 , ,
//⑥18 , 0-9 0-9 , 10 X( 10)
$arr = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
$result = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2]; // ,
$code = trim($_GET['code']);
$count = 0;
foreach ($arr as $key => $val) {
$num = substr($code, $key, 1);
$count += $num * $val;
if($key == 16)
$sex = $num;
}
$n = intval($count % 11);
$a = substr($code, -1, 1);
if (!in_array($n, array_flip($result)) || $result[$n] != strtoupper($a)) {
die(' ');
}
if($sex%2==0)
echo ' ,';
else
echo ' ,';
echo ' ';