PHP get guest IP, location and other skills to share

This article mainly and you introduced the use of PHP to obtain the visitor IP, location, browser and source pages and other information, the text gives a detailed sample code for everyone to reference the study, for everyone has a certain reference value, the need for friends below to see it together.

Sample code

<?php//this is similar to obtaining visitor information//convenient statistics class visitorinfo{//Get guest IP public Function getip () {$ip =false;  if (!empty ($_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: $_server[' remote_addr '); }//Get city, network operator and other information according to IP public function Findcitybyip ($ip) {$data = file_get_contents (' http://ip.taobao.com/service/  Getipinfo.php?ip= '. $ip); Return Json_decode ($data, $assoc =true);  }//Get user Browser type public function Getbrowser () {$agent =$_server["http_user_agent"];  if (Strpos ($agent, ' MSIE ')!==false | | strpos ($agent, ' rv:11.0 '))//ie11 judgment return "ie";  else if (Strpos ($agent, ' Firefox ')!==false) return "Firefox";  else if (Strpos ($agent, ' Chrome ')!==false) return "Chrome"; Else if (Strpos ($agent, ' opera ')!==false) return ' opera ';  else if ((Strpos ($agent, ' Chrome ') ==false) &&strpos ($agent, ' Safari ')!==false) return ' Safari '; else return ' unknown '; }//Get site Source Public Function GetFromPage () {return $_server[' http_referer '];}}