php實現禁止IP段訪問網站的代碼

代碼如下

複製代碼

<?php //加IP訪問限制 if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) { $userip = getenv('HTTP_CLIENT_IP'); } elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) { $userip = getenv('HTTP_X_FORWARDED_FOR'); } elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) { $userip = getenv('REMOTE_ADDR'); } elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) { $userip = $_SERVER['REMOTE_ADDR']; } $ban_range_low=ip2long("217.0.0.0"); //ip段上 $ban_range_up=ip2long("217.255.255.255");//ip段尾 $ip=ip2long($userip]); if ($ip>$ban_range_low && $ip<$ban_range_up) { print "Banned"; exit(); } ?>