PHP
$ch = curl_init();
$url = "http://localhost/target_ip.PHP";
$header = array(
'CLIENT-IP:58.68.44.61',
'X-FORWARDED-FOR:58.68.44.61',
);
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
$page_content = curl_exec($ch);
curl_close($ch);
echo $page_content;
?>

PHP
echo getenv('HTTP_CLIENT_IP');
echo getenv('HTTP_X_FORWARDED_FOR');
echo getenv('REMOTE_ADDR');
?>

$ch = curl_init();
curl_setopt($ch,"http://localhost/2.PHP");
curl_setopt($ch,array('X-FORWARDED-FOR:8.8.8.8','CLIENT-IP:8.8.8.8')); //构造IP
curl_setopt($ch,CURLOPT_REFERER,"//www.jb51.cc/ "); //构造来路
curl_setopt($ch,CURLOPT_HEADER,1);
$out = curl_exec($ch);
curl_close($ch);

function getClientIp() {
if (!empty($_SERVER["HTTP_CLIENT_IP"]))
$ip = $_SERVER["HTTP_CLIENT_IP"];
else if (!empty($_SERVER["HTTP_X_FORWARDED_FOR"]))
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
else if (!empty($_SERVER["REMOTE_ADDR"]))
$ip = $_SERVER["REMOTE_ADDR"];
else
$ip = "err";
return $ip;
}
echo "IP: " . getClientIp() . "";
echo "referer: " . $_SERVER["HTTP_REFERER"];