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@ 2013-12-23T06:12:40Z

<?php

var_dump(
filter_var("1337",FILTER_VALIDATE_IP,FILTER_FLAG_IPV4)
    );

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

36.13 ms | 402 KiB | 5 Q