php curl post запросы

<?php
  if( $curl = curl_init() ) {
    curl_setopt($curl, CURLOPT_URL, 'https://api.steampowered.com/ISteamRemoteStorage/GetCollectionDetails/v1/');
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,true);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, "key=WEB API KEY STEAM&collectioncount=1&publishedfileids=293494717");
    $out = curl_exec($curl);
    echo $out;
    curl_close($curl);
  } else {
    exit("Curl init error");
}
?>

<?php
$myCurl = curl_init();
curl_setopt_array($myCurl, array(
    CURLOPT_URL => 'https://api.steampowered.com/ISteamRemoteStorage/GetCollectionDetails/v1/',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => http_build_query(array("collectioncount"=>"1","publishedfileids[0]"=>"1"))
));
$response = curl_exec($myCurl);
curl_close($myCurl);

echo "Ответ на Ваш запрос: ".$response;

$url = 'https://api.steampowered.com/ISteamRemoteStorage/GetCollectionDetails/v1/';
$params = array(
    'collectioncount' => '1',
    'publishedfileids[0]' => '1'
);
$result = file_get_contents($url, false, stream_context_create(array(
    'http' => array(
        'method'  => 'POST',
        'header'  => 'Content-type: application/x-www-form-urlencoded',
        'content' => http_build_query($params)
    )
)));

echo $result;