非GH网站链接不跳转

application/controllers/welcome.php

@@ -26,24 +26,35 @@ class Welcome extends CI_Controller {
 
     //跳转函数，用来跟踪PPC订单，或者newsletter链接等等
     public function redirect() {
-        //要转向的URL
+      //要转向的URL
-        $url = $this->input->get('url');
+      $url = $this->input->get('url');
-
+        
-        //订单类型 Google PPC 32034   Bing PPC  32035
+      // 指定要匹配的域名
-        $typecode = $this->input->get('code');
+      $domainAH = 'asiahighlights.com';
-        if (!empty($typecode)) {
+      $domainCH = 'chinahighlights.com';
-            set_cookie('inquireTrackFrom', $typecode, 604800); //604800秒=7天过期时间
+      $domainGH = 'globalhighlights.com';
-        }
+
-
+      $veryfiedDomain = 
-        //获取google的搜索来源
+        hasDomain($url, $domainAH) || 
-        if (isset($_SERVER['HTTP_REFERER'])) {
+        hasDomain($url, $domainCH) || 
-            $inquireTrackGoogle = $_SERVER['HTTP_REFERER'];
+        hasDomain($url, $domainGH);
-            set_cookie('inquireTrackGoogle', $inquireTrackGoogle, 604800); //604800秒=7天过期时间
+
-        }
+      if ($veryfiedDomain) {      
-
         redirect($url);
+      } else {
+        send_404();
+        exit;
+      }
     }
 
+    function hasDomain($url, $domain) {
+      $parsed = parse_url($url);
+      $host = $parsed['host'];  
+      // 去掉 www. 前缀（如有必要）
+      $domain = preg_replace('#^www\.#', '', $domain);  
+      // 判断 host 是否以指定域名结尾
+      return preg_match('/' . preg_quote($domain, '/') . '$/i', $host);
+    }
 }
 
 /* End of file welcome.php */