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@ 2013-09-01T10:00:59Z

<?php
  $ips = array('127.0.0.1', '127.0.0.%', '214.12.213.525', '1221.21.122.11', '256.111.111.111');
foreach($ips as $ip) { var_dump(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)); }

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
filter_var: documentation ( source)

preferences:dark modelive preview

42.2 ms | 402 KiB | 5 Q