$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,"https://etrust-sandbox.electronicid.eu/v2/oneclick/onboarding.button");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$headers = [
    'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Encoding: gzip, deflate',
    'Cache-Control: no-cache',
    'Host: etrust-sandbox.electronicid.eu',
    'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:28.0) Gecko/20100101 Firefox/28.0',
    'X-MicrosoftAjax: Delta=true',
    'authorization:Bearer 4e23efbc-2f8c-4083-8590-09eb9b53ef0e'
    'content-type:application/json'
];

curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$server_output = curl_exec ($ch);

curl_close ($ch);

print  $server_output ;