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@ 2017-06-22T06:19:03Z

<?php

$ip = "127.0.0.1";

// Validate ip
if (filter_var($ip, FILTER_VALIDATE_IP)) {
    echo("$ip is a valid IP address");
} else {
    echo("$ip is not a valid IP address");
}

Output
Performance
VLD
References
Branches

filter_var: documentation ( source)

preferences:dark modelive preview

50.49 ms | 402 KiB | 5 Q