PHP Examples: Converts an IP address from a string to a positive integer.

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Converts an IP address from a string to a positive integer.

Take an IP address in xxx.xxx.xxx.xxx format and converts it to an integer value. The addition in this routine makes sure the returned number is a positive value, which allows for easier handling of comparisions on the integer value if the original IP is greater than 127.255.255.255.


<?php
    
// We will user the remote IP for this example

    $ip2 = ip2long($REMOTE_ADDR);

    if ($ip2 < 0) $ip2 += pow(2,32); 

    print($ip);

?>

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