php根据ip段控制显示广告

代码如下

<?php

function getIP() {

$realip = ''; //设置默认值
if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $realip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
    $realip = $_SERVER['HTTP_CLIENT_IP'];
} else {
    $realip = $_SERVER['REMOTE_ADDR'];
}

preg_match('/^((?:\d{1,3}\.){3}\d{1,3})/',$realip,$match);
return $match?$match[0]:false;

}

if(strpos(getIP(),'118.73.') !== false){
//echo '包含ip端则屏蔽广告';
}else{
//echo '不包含ip端则显示广告';
?>
广告代码
<?php
}
?>