CFLib.org – Common Function Library Project

Description:
This function will accept a http_referer and check to see if referer is from google.com. If so, it will return the keywords used for the search. If not, this function will return an empty string.

Return Values:
Returns a string.

Example:

<cfset ref1 = "http://www.google.com/search?hl=en&q=chinesezodiac&btnG=Google+Search">
<cfset ref2 = "http://www.google.com/search?hl=en&q=coldfusion+open+source">
<cfoutput>
Keywords from #ref1# = #GetGoogleKeywords(ref1)#<br>
Keywords from #ref2# = #GetGoogleKeywords(ref2)#<br>
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Pass it a http_referer value and this fuction will parse out the keywords used to find it if referred from Google.
 * 
 * @param referer      The referer string to check. (Required)
 * @return Returns a string. 
 * @author Matthew Fusfield (matt@fus.net) 
 * @version 1, June 28, 2002 
 */
function getGoogleKeywords(referer) {
    
    var Keywords='';
    var StartPos=0;
    var EndString='';
    
    if (referer contains 'google.com') {
        StartPos=ReFindNoCase('q=.',referer);
    
        if (StartPos GT 0) {
            EndString=mid(referer,StartPos+2,Len(referer));
            Keywords=ReReplaceNoCase(EndString,'&.*','','ALL');
            Keywords=URLDecode(Keywords);
            }
        
        return Keywords;
    }
    else {
        return '';
    }
    
    
    
}