解析分析以找到引薦來源的最佳方式？

Question

例如...

if(isset($_GET['utm_blah'])) { $referrer = $_GET['utm_blah'; } 
else { $referrer = $_SERVER['HTTP_REFERER']; } 

尋找解析引用由谷歌的AdWords發送，或Twitter，或發送電子郵件，...等等。謝謝！

Answer 1

一個小片段

 
if(isset($_SERVER['HTTP_REFERER'])) { 
    $in['ref'] = $_SERVER['HTTP_REFERER']; 
} 
//... 
if(isset($in['ref'])) { 
    $found=false; 

    /* referrer on same domain ? */ 
    if(isset($in['domain'])) { 
     $refdomain=eregi_replace("^www.","",parse_url($in['ref'],PHP_URL_HOST)); 
     if($in['domain']==$refdomain) { 
      $found=true; 
     } 
     unset($refdomain); 
    } 

    /* check referrer ignore list */ 
    if($found==false && is_file('refferer.ignore.txt') && filesize('refferer.ignore.txt')>0) { 
     $ignorelist=explode("\n",file_get_contents('refferer.ignore.txt')); 
     $maxi=count($ignorelist); 
     if($maxi>0) { 
      $i=0; 
      while(false===$found && $i