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CReferrer: Extract search engine keywords from referrer URL

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Picture of Setec Astronomy
Name: Setec Astronomy <contact>
Classes: 20 packages by
Country: Italy Italy
Age: ???
All time rank: 141 in Italy Italy
Week rank: 59 Down3 in Italy Italy Down
Innovation award
Innovation award
Nominee: 5x

  Detailed description   Download Download .zip .tar.gz   Install with Composer Install with Composer  
Most browsers usually send the URL of a page the user accessed before and clicked on a link or submited a form that lead to the current page. That information is usually passed to PHP scripts in HTTP_REFERER environment variable.

This class is meant to parse the HTTP referer URL of the page that lead the user to the current page and determine if it is a known search engine.

In the case that a known search engine is recognized, the class can extract the search keywords that the user entered in the search site.

The class comes with a data file that is used to described 24 known search engines. You may edit this file to add more entries to let the class recognize more search sites from the referer URL.

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Name: CReferrer
Base name: creferrer
Description: Extract search engine keywords from referrer URL
Version: 1.0.0
PHP version: -
License: GNU General Public License (GPL)
All time users: 2868 users
All time rank: 1200
Week users: 0 users
Week rank: 1438 Equal
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Group folder image HTTP HTTP protocol clients, headers and cookies View top rated classes
Group folder image Text processing Manipulating and validating text data View top rated classes

  Innovation Award  
PHP Programming Innovation award nominee
March 2004
Number 6
Where are my site visitors coming and why, are frequent questions asked by many site owners. One way to track that information is using the HTTP referer headers that tell the URL of the page that the user visited before the current page.

The search engine sites are one common source of new visitors. Usually the user searches for something and the search engine site presents a list of pages where what is searched may be found. The search keywords are part of the URL of the search engine result pages. When the use clicks on a result link and accesses the listed site, usually the browser passes to that site the URL of the search engine results page in the HTTP referer header.

What this class does is to parse the HTTP referer header and try to match it against the URL pattern of several well known search engine sites.

This definitely helps answering Web site owner questions about where did my site visitors come from and what where they searching for that lead them to my site.

Manuel Lemos

  User ratings  
RatingsUtility Consistency Documentation Examples Tests Videos Overall Rank
All time: Good (84%) Sufficient (75%) - Sufficient (77%) - - Not sure (57%) 1081
Month: Not yet rated by the users

  Pages that reference this package  
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You'll need to use $_SERVER['HTTP_REFERER'] to determine that information...

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  Files folder image Files  
File Role Description
Plain text file creferrer.class.php Class CReferrer class
Accessible without login Plain text file engines.ini Data Search engines settings
Accessible without login Plain text file test_referrer.php Example Test script

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