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Catching Keywords from Search Engines

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4.30 (10 votes)
18 Dec 2009CPOL
With this class we try to catch some keywords from google, yahoo and bing search engines.<?phpclass keywords{ private $referer; private $_e; public $keywords; public function __construct() { if($_SERVER['HTTP_REFERER']) { ...
With this class we try to catch some keywords from google, yahoo and bing search engines.

<?php
class keywords
{
 private $referer;
 private $_e;
 public $keywords;

 public function __construct()
 {
   if($_SERVER['HTTP_REFERER'])
   {
     if(preg_match("#\.google|search\.yahoo|\.bing#", $_SERVER['HTTP_REFERER']))
     {
       $this->referer = urldecode($_SERVER['HTTP_REFERER']);
     }
     else
     {
       return;
     }    
   }
   else
   {
     return;
   }    
 }

 private function getSeparators()
 {
   $this->_e = (preg_match("#\?q=|\?p=#", $this->referer)) ? "\?" : "&";
 }

 public function getKeywords()
 {
   if(!empty($this->referer))
   {
     $this->getSeparators();
     //google
     if(preg_match("#\.google#", $this->referer))
     {
       $m_ = preg_match("#{$this->_e}q=(.+?)&#si", $this->referer, $this->keywords);

       if($m_ == 0)
       {
         return false;
       }
     }
     //yahoo
     elseif(preg_match("#search\.yahoo#", $this->referer))
     {
       $m_ = preg_match("#{$this->_e}p=(.+?)\&#si", $this->referer, $this->keywords);

       if($m_ == 0)
       {
         return false;
       }
     }
     //bing
     elseif(preg_match("#\.bing#", $this->referer))
     {
       $m_ = preg_match("#{$this->_e}q=(.+?)\&#si", $this->referer, $this->keywords);

       if($m_ == 0)
       {
         return false;
       }
     }
     else
     {
       return false;
     }

     return $this->keywords[1];
   }
   else
   {
     return false;
   }
  }
}
?>


Save this script as keywords_class.php

Now let’s try to print these keywords.

<?php
require_once('keywords_class.php');
$keywordsObj = new keywords();
$keys = $keywordsObj->getKeywords();

if($keys)
{
 print $keys;
}
else
{
 print "ooops";
}
?>


Save this code as index.php

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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GeneralThanks Pin
jasonp122-Jan-10 16:05
memberjasonp122-Jan-10 16:05 

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Posted 18 Dec 2009

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