PHP uses CURL to forge IP addresses and sources, and PHPCURL to forge IP addresses

PHP uses CURL to forge IP addresses and sources, and PHPCURL to forge IP addresses

1. php requests 2.php. 1. php code: $ ch = curl_init (); curl_setopt ($ ch, CURLOPT_URL, "http: // localhost/2.php"); curl_setopt ($ ch, CURLOPT_HTTPHEADER, array ('x-FORWARDED-FOR: 8.8.8.8 ', 'client-IP: 8.8.8.8'); // construct IPcurl_setopt ($ ch, CURLOPT_REFERER, "http://www.gosoa.com.cn /"); // construct curl_setopt ($ ch, CURLOPT_HEADER, 1); $ out = curl_exec ($ ch); curl_close ($ ch); 2. the php code is as follows: 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"];