Question

I want to customize my index.php when a visitor searchs for a word in google search and comes to my site.
ex:

if(visitor searches for "A" in google search)
   do somthing;
elseif(visitor searches for "B" in google search)
   do somthing else;

if i should use referrer tell me how?

Answer 1

Try this script:

function getKeywords()
{
    $refer = parse_url($_SERVER['HTTP_REFERER']);
    $host = $refer['host'];
    $refer = $refer['query'];

    if(strstr($host,'google'))
    {
        $match = preg_match('/&q=([a-zA-Z0-9+-]+)/',$refer, $output);
        $querystring = $output[0];
        $querystring = str_replace('&q=','',$querystring);
        $keywords = explode('+',$querystring);
        return $keywords;
    }
    else
    {
        return false;
    }
}

Note: this does not work when the someone used encrypted Google (which uses SSL): https://encrypted.google.com/