note 86587 modified in function.substr by danbrown
| From: | danbrown@php.net | Date: | Fri, 24 Oct 2008 21:40:37 +0000 |
| Subject: | note 86587 modified in function.substr by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-145725@lists.php.net to get a copy of this message | ||
Here we have gr8 function which simply convert ip address to a number using substr with negative
offset.
You can need it if you want to compare some IP addresses converted to a numbers.
For example when using ip2country, or eliminating same range of ip addresses from your website :D
<?php
function ip2no($val)
{
list($A,$B,$C,$D) = explode(".",$val);
return
substr("000".$A,-3).
substr("000".$B,-3).
substr("000".$C,-3).
substr("000".$D,-3);
}
$min = ip2no("10.11.1.0");
$max = ip2no("111.11.1.0");
$visitor = ip2no("105.1.20.200");
if($min<$visitor && $visitor<$max)
{ echo 'Welcome !'; }
else
{ echo 'Get out of here !'; }
?>
--was--
Here we have gr8 function which simply convert ip address to a number using substr with negative
offset.
You can need it if you want to compare some IP addresses converted to a numbers.
For example when using ip2country, or eliminating same rang of ip addresses from your website :D
<?
function ip2no($val)
{
list($A,$B,$C,$D) = explode(".",$val);
return
substr("000".$A,-3).
substr("000".$B,-3).
substr("000".$C,-3).
substr("000".$D,-3);
}
$min = ip2no("10.11.1.0");
$max = ip2no("111.11.1.0");
$visitor = ip2no("105.1.20.200");
if($min<$visitor && $visitor<$max)
{ echo 'Welcome !'; }
else
{ echo 'Get out of here !'; }
?>
http://php.net/manual/en/function.substr.php