By: Darkshire in PHP Tutorials on 2011-04-08
Here are some tricks to convert from a "dotted" IP address to a LONG int, and backwards. This is very useful because accessing an IP addy in a database table is very much faster if it's stored as a BIGINT rather than in characters.
IP to BIGINT:
<?php $ipArr = explode('.',$_SERVER['REMOTE_ADDR']); $ip = $ipArr * 0x1000000 + $ipArr * 0x10000 + $ipArr * 0x100 + $ipArr ; ?>
This can be written in a bit more efficient way:
<?php $ipArr = explode('.',$_SERVER['REMOTE_ADDR']); $ip = $ipArr<<24 + $ipArr<<16 + $ipArr <<8 + $ipArr ; ?>shift is more cheaper.
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