PHP Apple Receipt Verification Function

verify_apple_receipt.php

<?php

// http://stackoverflow.com/questions/19785803/validating-appreceiptstoreurl-returning-21002-status
// http://stackoverflow.com/questions/19222845/ios7-receipts-not-validating-at-sandbox-error-21002-java-lang-illegalargume

function verify_curl($base64receipt, $sandbox = false)
{
    if ($sandbox) {
        $url = 'https://sandbox.itunes.apple.com/verifyReceipt';
    } else {
        $url = 'https://buy.itunes.apple.com/verifyReceipt';
    }

    $data = json_encode(array('receipt-data' => $base64receipt));

    // Open a Connection using POST method, as it is required to use POST method.
    $ch = curl_init();
    // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
    $result = curl_exec($ch);
    curl_close($ch);

    return json_decode($result, true);
}

function verify_hrequest($base64receipt, $sandbox = false)
{
    $data = '{"receipt-data" : "'.$base64receipt.'"}';
    if ($sandbox) {
        $request = new HttpRequest('https://sandbox.itunes.apple.com/verifyReceipt', HTTP_METH_POST);
    } else {
        $request = new HttpRequest('https://buy.itunes.apple.com/verifyReceipt', HTTP_METH_POST);
    }
    $request->setBody($data);
    $request->send();
    $result = $request->getResponseBody();

    return json_decode($result, true);
}

function verify_fgcontents($base64receipt, $sandbox = false)
{
    if ($sandbox) {
        $url = 'https://sandbox.itunes.apple.com/verifyReceipt';
    } else {
        $url = 'https://buy.itunes.apple.com/verifyReceipt';
    }

    $data = json_encode(array("receipt-data" => $base64receipt));

    // Use key 'http' even if you send the request to https://...
    // This: 'content' => http_build_query($data), seems to generate an error (21002)
    $options = array(
        'http' => array(
            'header'  => "Content-type: application/x-www-form-urlencoded",
            'method'  => 'POST',
            'content' => $data
        ),
    );
    $context = stream_context_create($options);
    $result = file_get_contents($url, false, $context);

    return json_decode($result, true);
}