Question

I m 配对PHP中的Pip地址。因此,我的检查是:

function checkIP($ip){
    $ip = trim($ip);
    if (preg_match("(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)", $ip)) return true;
    $v6pattern = "/
(A([0-9a-f]{1,4}:){1,1}(:[0-9a-f]{1,4}){1,6})|
(A([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,5})|
(A([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,4})|
(A([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,3})|
(A([0-9a-f]{1,4}:){1,5}(:[0-9a-f]{1,4}){1,2})|
(A([0-9a-f]{1,4}:){1,6}(:[0-9a-f]{1,4}){1,1})|
(A(([0-9a-f]{1,4}:){1,7}|:):)|
(A:(:[0-9a-f]{1,4}){1,7})|
(A((([0-9a-f]{1,4}:){6})(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3}))|
(A(([0-9a-f]{1,4}:){5}[0-9a-f]{1,4}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3}))|
(A([0-9a-f]{1,4}:){5}:[0-9a-f]{1,4}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})|
(A([0-9a-f]{1,4}:){1,1}(:[0-9a-f]{1,4}){1,4}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})|
(A([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,3}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})|
(A([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,2}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})|
(A([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,1}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})|
(A(([0-9a-f]{1,4}:){1,5}|:):(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})|
(A:(:[0-9a-f]{1,4}){1,5}:(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3})
/x";
    if (preg_match($v6pattern, $ip)) return true;
    return false;
}

然而,I m 发现了一个错误:warning: preg_match (功能.preg-match]:C:xampphtdocsindex. Delimiter绝不能成为甲型数字或反弹。 php on line 5

Line 5 is if (preg_match("(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)", $ip)) return true;

什么错误?

Answer 1

你们必须把reg子放在划界者之间。 http://php.net/manual/en/regexp.vis.delimiters.php“rel=“nofollow”>。也可以使用过滤器,并避免回收轮椅。例如:

filter_var($var, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6); //for IP s V6

and

filter_var($var, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4); //for IP s V4

Answer 2

我将ski熟地利用。模块来自zen。远比你所派驻的管理机构更加容易和有力。

  $validator = new Zend_Validate_Ip();

  if ($validator->isValid($ip)) {

      // ip appears to be valid

  } else {

      // ip is invalid; print the reasons

  }

Answer 3

Your first call to preg_match does not have a delimiter for the regex used.

PHP期望在preg_match中的reg在限定物的平板之间封闭。特性/是公众选择划界,在您的第二至次打电话到时也使用这一选择。您也可使用诸如<代码>#、>>、@、~、!。



增加失踪人员:

if (preg_match("#(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)#", $ip)) return true;
                ^                                                                                                                                                                  ^

Answer 4

如果您不考虑IPv4和IPv6的地址,则通过 inet_ntop 和

function is_ip($address) {
  $packed = inet_pton ($address);
  if (FALSE == $packed || FALSE === inet_ntop ($packed)) {
    return FALSE;
  }
  return TRUE;
}

Answer 5

To match an IPv4 address you can simply use:

preg_match ("/d{1,3}.d{1,3}.d{1,3}.d{1,3}/”,$string,$result;

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