[Marco van Herwaarden]

Don't think too much

It would already do that, i a review with the ip you now provided i found out that the sprintf is really neccesary to avoid negative numbers.

PHP Code:

<?php
$ip = "217.165.90.184";
echo "<br />ip: $ip";
$reversed = implode(".",array_reverse(explode(".", $ip)));
echo "<br />reversed: $reversed";
$reversedlong = sprintf("%u",ip2long(implode(".",array_reverse(explode(".", $ip)))));
echo "<br />reversedlong: $reversedlong";
?>

Will produce:

ip: 217.165.90.184
reversed: 184.90.165.217
reversedlong: 3092948441