<?
/*
// GoogleTotalResults
// Fetches the total number of results from a query on google
//
// warning: this class depends on source code from the google results page
// if google changes the syntax on that page this class may not function properly
// please update the GOOGLE_RESULTS_PATTERN if google makes changes to the results page
//
// also please remember this is based on the US version of google
//
// Created By: Sunny Rajpal
// Version 1.0 2007.05.30
*/
define("GOOGLE_SEARCH_STRING_BASE","http://www.google.com/search?hl=en&q=");
define("GOOGLE_RESULTS_PATTERN","|Results <b>[0-9]*</b> - <b>[0-9]*</b> of about <b>(.*)</b> for|");
class GoogleTotalResults
{
var $Term="";
var $Error="";
var $SearchString="";
var $TotalResults=0;
function GoogleTotalResults($term)
{
$this->Term = $term;
}
function setSearchTerm($term)
{
$this->Term = $term;
}
function getLastError()
{
return $this->Error;
}
function getResults()
{
if ($this->Term == "")
{
$this->Error = "Search term not set";
return false;
}
$this->TotalResults=0;
$this->SearchString = GOOGLE_SEARCH_STRING_BASE . urlencode($this->Term);
$fp = fopen($this->SearchString,"r");
if (!$fp)
{
$this->Error = "Error accessing google search url";
return false;
}
$retval=false;
$this->Error = "Could not find results in source";
while (!feof($fp))
{
$data = fgets($fp);
preg_match(GOOGLE_RESULTS_PATTERN,$data,$matches);
if (count($matches) == 2)
{
$this->TotalResults = trim(str_replace(",","",$matches[1]));
$retval = $this->TotalResults;
$this->Error = "";
break;
}
}
fclose($fp);
return $retval;
}
}
?>
