[极客大挑战 2019]BuyFlag
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源码中发现内容
// ~~~post money and password~~~
if (isset($_POST['password'])) { //post方法传递password
$password = $_POST['password'];
if (is_numeric($password)) { //password不能是数字
echo "password can't be number";
}elseif ($password == 404) { // 绕过 令 password=404a
echo "Password Right!";
}
}