string-How do I intercept the IP address in the string "Xxx_xxxx_ip address _xxxxxxxx_xxxxxx" in PHP?

In PHP, a string such as "xxx_xxxx_10.136.132.61_xxxxxxxx_xxxxxx", How to get the "10.136.132.61" part of it.

Because the IP address is different in length, so I think at the beginning of the substr is not applicable. If you look for "_" position, because there are two "_" before and after the IP, so also not.

In addition to the IP address length is not determined, the other length is determined, the format is also determined, are "XXX_XXXX_IP address _xxxxxxxx_xxxxxx" This format, X represents a character

Thank you all for your help!

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In PHP, a string such as "xxx_xxxx_10.136.132.61_xxxxxxxx_xxxxxx", How to get the "10.136.132.61" part of it.

Because the IP address is different in length, so I think at the beginning of the substr is not applicable. If you look for "_" position, because there are two "_" before and after the IP, so also not.

In addition to the IP address length is not determined, the other length is determined, the format is also determined, are "XXX_XXXX_IP address _xxxxxxxx_xxxxxx" This format, X represents a character

Thank you all for your help!

If you can determine that other strings do not have the class IP format, you can match

$str = 'xxx_xxxx_10.136.132.61_xxxxxxxx_xxxxxx';$patten = '(/25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]{1,2})){3}/';preg_match($patten,$str,$result);var_dump($result);$ip = $result[0];

Do not understand PHP, but this question can be answered next, one, the regular match. Two, cut the string, cut the tail.

Use the regular bar.

$data = 'xxx_xxxx_10.136.132.61_xxxxxxxx_xxxxxx';$preg = '/[\d\.]+/i';preg_match($preg, $data, $matches);var_dump($matches);

Explode function is done.

$str = 'xxx_xxxx_10.136.132.61_xxxxxxxx_xxxxxx';$arr = explode('_', $str);print_r($arr);

I ask myself to answer, can use substr ($STR, 9,-16)

explode('_', $str)[2]

With the regular can be very flexible, and with explode, or substr, are opportunistic. 3L is the positive solution

Support explode, simple and convenient, anyway format is fixed

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