Question

Using PHP I’d like to compare an actual ip address to part of one, and see if it matches.
For example I want to see if the address matches 12.34..

<?php
$rem_address = getenv('REMOTE_ADDR');
$temp = substr ($rem_address,0,6)
if ($temp == "12.34.") echo "It's a match";
?>

Is there an easier/better way to do this?

Answer 1

The function strpos($haystack, $needle) will tell you the first position in the $haystack string where the substring appears.

As long as you are careful to check the with the === comparison operator, you can see if "12.34" appears at the beginning of the IP address.

if (strpos ($rem_address, "12.34.") === 0) echo "It's a match";

Check out the documentation and pay careful attention to the Warning.