Example (PHP)

gistfile1.aw

<?php
function curl_get($url)
{
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    $output = curl_exec($ch);
    curl_close($ch);
    return $output;
}

function get_many($urls) {
    $mh = curl_multi_init();
    $chs = array();
    for($i = 0; $i < sizeof($urls); $i++) {
        $ch = curl_init($urls[$i]);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_multi_add_handle($mh, $ch);
        array_push($chs, $ch);
    }

    $running = null;
    do {
        curl_multi_exec($mh, $running);
    }
    while ($running);

    $responses = array();
    for($i = 0; $i < sizeof($chs); $i++) {
        $resp =  curl_multi_getcontent($chs[$i]);
        array_push($responses, json_decode($resp));
    }
    return $responses;
}

function post_many($urls, $headers, $bodies, $is_xml) {
    $mh = curl_multi_init();
    $chs = array();

    for($i = 0; $i < sizeof($urls); $i++) {
        $ch = curl_init($urls[$i]);

        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
        curl_setopt($ch, CURLOPT_UPLOAD, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers[$i]);
        curl_setopt($ch, CURLOPT_POSTFIELDS, '$bodies[$i]');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

        curl_multi_add_handle($mh, $ch);
        array_push($chs, $ch);
    }

    $running = null;
    do {
        curl_multi_exec($mh, $running);
    }
    while ($running);

    $responses = array();
    for($i = 0; $i < sizeof($chs); $i++) {
        $resp =  curl_multi_getcontent($chs[$i]);
        if($is_xml) {
            $resp = simplexml_load_string($resp);
        }
        else {
            $resp = json_decode($resp);
        }
        array_push($responses, $resp);
    }
    return $responses;
}

$keyword = 'ferrari';
$apikey = 'aaa';
$authtoken = 'bbb';

$url = 'http://svcs.ebay.com/services/search/FindingService/v1?OPERATION-NAME=findItemsByKeywords&SERVICE-VERSION=1.8.0&GLOBAL-ID=EBAY-US&SECURITY-APPNAME='
    . $apikey . '&RESPONSE-DATA-FORMAT=XML&keywords='
    . $keyword . '&paginationInput.entriesPerPage=5&paginationInput.pageNumber=1&outputSelector(0)=SellerInfo';

$str = curl_get($url);
// Convert to JSON
$items = simplexml_load_string($str);

$ids = array();
for ($i = 0; $i < sizeof($items->searchResult->item); $i++) {
    $item = $items->searchResult->item[$i];
    array_push($ids, $items->searchResult->item[$i]->itemId);
}

$response = array();

// User
$url =  'http://open.api.ebay.com/shopping?callname=GetUserProfile&responseencoding=JSON&appid='
    . $apikey . '&version=721&IncludeSelector=Details&UserID=sallamar';

$user = json_decode(curl_get($url));
$response['user'] = $user;

// getSingleItem
$urls = array();
for($i = 0; $i < sizeof($ids); $i++) {
    $url = 'http://open.api.ebay.com/shopping?callname=GetSingleItem&responseencoding=JSON&appid='
        . $apikey . '&version=715&IncludeSelector=&ItemID=' . $ids[$i];
    array_push($urls, $url);
}
$response['items'] = get_many($urls);

// getBestOffers
$urls = array();
$headers = array();
$bodies = array();
for($i = 0; $i < sizeof($ids); $i++) {
    $url = 'https://api.ebay.com/ws/api.dll?appid=' . $apikey .'&version=723';
    array_push($urls, $url);

    $body = '<?xml version="1.0" encoding="utf-8"?><GetBestOffersRequest xmlns="urn:ebay:apis:eBLBaseComponents">'
            . '<ItemID>' . $ids[$i] .'</ItemID>'
            . '<RequesterCredentials>'
            . '<eBayAuthToken>' . $authtoken . '</eBayAuthToken>'
            . '</RequesterCredentials>'
            . '</GetBestOffersRequest>';
    array_push($bodies, $body);

    $header = array();
    array_push($header, 'content-type: application/xml; charset=UTF-8');
    array_push($header, 'x-ebay-api-siteid:	0');
    array_push($header, 'x-ebay-api-compatibility-level: 723');
    array_push($header, 'x-ebay-api-call-name: getBestOffers');
    array_push($header, 'x-ebay-api-app-name: eBayinc2e-d3b4-4a21-a765-47cc6b01cf7');
    array_push($header, 'x-ebay-api-dev-name: 101e429b-df77-47ee-80f5-349eabe13c42');
    array_push($header, 'x-ebay-api-cert-name: 6c620af8-6fec-418c-bc40-35d7dd89fd8b');
    array_push($header, 'Transfer-Encoding: chunked');
    array_push($header, 'Connection: close');
    array_push($headers, $header);
}
$response['bestOffers'] = post_many($urls, $headers, $bodies, True);

// getAllBidders
$urls = array();
$headers = array();
$bodies = array();
for($i = 0; $i < sizeof($ids); $i++) {
    $url = 'https://api.ebay.com/ws/api.dll?appid=' . $apikey .'&version=723';
    array_push($urls, $url);

    $body = '<?xml version="1.0" encoding="utf-8"?>'
            .'<GetAllBiddersRequest xmlns="urn:ebay:apis:eBLBaseComponents">'
            .'<ErrorLanguage></ErrorLanguage>'
            .'<OutputSelector></OutputSelector>'
            .'<WarningLevel>High</WarningLevel>'
            .'<CallMode>ViewAll</CallMode>'
            .'<IncludeBiddingSummary>true</IncludeBiddingSummary>'
            .'<ItemID>' . $ids[$i] .'</ItemID>'
            .'<RequesterCredentials>'
            .'<eBayAuthToken>' . $authtoken . '</eBayAuthToken>'
            .'</RequesterCredentials>'
            .'</GetAllBiddersRequest>';
    array_push($bodies, $body);

    $header = array();
    array_push($header, 'content-type: application/xml; charset=UTF-8');
    array_push($header, 'x-ebay-api-siteid: 0');
    array_push($header, 'x-ebay-api-compatibility-level: 723');
    array_push($header, 'x-ebay-api-call-name: getAllBidders');
    array_push($header, 'x-ebay-api-app-name: xxx');
    array_push($header, 'x-ebay-api-dev-name: yyy');
    array_push($header, 'x-ebay-api-cert-name: zzz');
    array_push($header, 'Transfer-Encoding: chunked');
    array_push($header, 'Connection: close');
    array_push($headers, $header);
}
$response['allBidders'] = post_many($urls, $headers, $bodies, True);

echo json_encode($response);
?>