代码一：
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function getip() {
static $ip = '';
$ip = $_SERVER['REMOTE_ADDR'];
if(isset($_SERVER['HTTP_CDN_SRC_IP'])) {
$ip = $_SERVER['HTTP_CDN_SRC_IP'];
} elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/',$_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR']) AND preg_match_all('#\d{1,3}\.\d{1,3}#s',$_SERVER['HTTP_X_FORWARDED_FOR'],$matches)) {
foreach ($matches[0] AS $xip) {
if (!preg_match('#^(10|172\.16|192\.168)\.#',$xip)) {
$ip = $xip;
break;
}
}
}
return $ip;
}
代码二：
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方法三：
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方法四：
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方法五：
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PHP
function get_real_ip()
{
$ip=false;
if(!empty($_SERVER["HTTP_CLIENT_IP"])){
$ip = $_SERVER["HTTP_CLIENT_IP"];
}
if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
$ips = explode (",",$_SERVER['HTTP_X_FORWARDED_FOR']);
if($ip){
array_unshift($ips,$ip); $ip = FALSE;
}
for($i = 0; $i < count($ips); $i++){
if (!eregi ("^(10|172\.16|192\.168)\.",$ips[$i])){
$ip = $ips[$i];
break;
}
}
}
return($ip ? $ip : $_SERVER['REMOTE_ADDR']);
}
echo get_real_ip();
?>
方法六：
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