how can i fix php multi curl keep on loading some times

Question

Hi am using multi curl for the first time. seems endless and reach my PHP execution limit.i can see it hitsserver(http://samples.com/attraction1w1.1/ServiceMobile.php) and server also responding successfully but multi curl response not getting.tried in many ways. Please help me to what am doing wrong or anything i missed Is there a way to set a timeout for each handle to avoid an endless loop? What else I could do to fix this problem?

$data = Array
(
    [0] => Array
        (
            [apiFunctionName] => process
            [action] => GetAttractionList
            [mode] => TEST
            [cityId] => 1
            [countryId] => 1
            [postData] => 
            [currencyCode] => SGD
            [referenceId] => Z29idWRnZXRhaXJURVNUMzYzMTk=
            [securityToken] => 3b489903de0daf1267879757cabebe7e
            [hashKey] => 3b489903de0daf1267879757cabebe7e
            [access] => mobile
            [userName] => GBAB2C
            [code] => 1
            [apiName] => Globaltrix
            [returnType] => JSON
            [apiUrl]=>http://samples.com/attraction1w1.1/ServiceMobile.php 
        )

)
foreach ($data as $id => $d)
{
    $curly[$id] = curl_init();                       
    curl_setopt($curly[$id], CURLOPT_URL, $dataURL[$id]);
    curl_setopt($curly[$id], CURLOPT_HTTPHEADER, array("Content-Type: application/json; charset=utf-8")); 
    curl_setopt($curly[$id], CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
    curl_setopt($curly[$id], CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curly[$id], CURLOPT_ENCODING, "gzip");
    if (is_array($d)) {
    curl_setopt($curly[$id], CURLOPT_POSTFIELDS, json_encode($data[$id]));
    } 
    if (!empty($options)) {
        curl_setopt_array($curly[$id], $options);
    }

    curl_multi_add_handle($attr, $curly[$id]);
}                                                                           
$running = null;
do {
    curl_multi_exec($attr, $running);
} while($running > 0);
foreach($curly as $id => $c) {
    $result[$id] = curl_multi_getcontent($c);
    curl_multi_remove_handle($attr, $c);
}
echo "<pre>";print_r($result);die;