i used google search api to develop my application is there any way to add 
a filter by date, i checked out the documentation and i found nothing also 
i tired the parameter qdr:m as shown in google web url but it didn't 
work...NB im using google search api PHP this is my code

function curl_get($url, $params) { $post_params = array(); foreach ($params 
as $key => &$val) { if (is_array($val)) $val = implode(',', $val); 
$post_params[] = $key.'='.urlencode($val); } $post_string = implode('&', 
$post_params);

$fullurl = $url."?".$post_string;

$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_URL, $fullurl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mailana (curl)');
$result = curl_exec($ch);
curl_close($ch);
return $result; }function perform_google_web_search($termstring,$siteweb = 
null,$qrd = null) {
$start = 1;
$result = array();while ($start<50){
    $searchurl = 'http://ajax.googleapis.com/ajax/services/search/web?v=1.0';
    $searchurl .= '&key=';
    $searchurl .= '&start='.$start;
    $searchurl .= '&rsz=large';
    $searchurl .= '&filter=0';
    $searchurl .= '&q='.urlencode($termstring).$siteweb;
    $searchurl .= '&tbs='.$qrd;

    $response = curl_get($searchurl, array());

    $responseobject = json_decode($response, true);

    if (count($responseobject['responseData']['results'])==0)
        break;

    $allresponseresults = $responseobject['responseData']['results'];

    foreach ($allresponseresults as $responseresult)
    {
        $result[] = array(
            'url' => $responseresult['url'],
            'title' => $responseresult['title'],
            'abstract' => $responseresult['content'],
        );

    }

    $start += 8;}
return $result; }

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