Question

我有一个用于注册过程的密码验证脚本，如果我没有设置最大长度限制，它就可以正常工作。如果我添加最大限制为32，则忽略验证，即使我有超过32个字符，也会创建帐户。

工作脚本：

    if (preg_match("/^.*(?=.{8,})(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).*$/", $_POST["password"]) === 0)
    {
        echo "The password must contain lower case characters, upper case characters and numbers. It's length should be between 8 and 32 characters.";
    }

不工作的脚本：

if (preg_match("/^.*(?=.{8,32})(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).*$/", $_POST["password"]) === 0)
        {
            echo "The password must contain lower case characters, upper case characters and numbers. It's length should be between 8 and 32 characters.";
        }

敬礼之前请告诉我，以便我可以编辑我的问题。谢谢！

Answer 1

要限制长度，只需编辑正则表达式即可。你已经到了一半了。

/^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).{8,32}$/

演示：http://regex101.com/r/nK5yY6

Answer 2

在一个大的正则表达式中执行它是一个代码维护的噩梦。拆分它对于查看代码的其他人来说要容易得多，它还允许您提供更具体的错误消息。

此解决方案适用于我，请尝试：

$password  = $_POST["password"];
$uppercase = preg_match('@[A-Z]@', $password);
$lowercase = preg_match('@[a-z]@', $password);
$number    = preg_match('@[0-9]@', $password);
$length    = preg_match("@^.{8,32}$@" , $password);

if(!$uppercase || !$lowercase || !$number ||  !$length  ) {
   echo "The password must contain lower case characters, upper case characters and numbers. It's length should be between 8 and 32 characters.";
}

Answer 3

if (preg_match("/^.*(?=.{8,})(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).*$/", $_POST["password"]) === 0 || strlen($_POST['password']) < 8 || strlen($_POST['password']) > 32 )
    {
        echo "The password must contain lower case characters, upper case characters and numbers. It's length should be between 8 and 32 characters.";
    }

Answer 4

如果您要查找至少1位数和1位字母的密码，请尝试以下操作：

^.*(?=.{8,32})(?=.*\d)(?=.*[a-zA-Z]).*$

密码最大长度

4 个答案: