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@ 2013-12-03T22:05:38Z

<?php

var_dump( 
    filter_var( '128.1.46.45', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE ) 
    );

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

37.41 ms | 402 KiB | 5 Q