Add custom header

[juancarielo]

Add custom header and relateds, example code:

// Array $http_header data default

$headerDataDefault = array('Accept: application/json', 'Content-Type: application/json');

// Check headerData
if (!empty($headerData)) {

    $headerDataDefault = array_merge($headerDataDefault, $headerData);

}

curl_setopt($curl, CURLOPT_HTTPHEADER, $headerDataDefault);

Send custom header:

// $headerData = array('Authorization: HASH_AUTHORIZATION')
RestCurl::exec("GET", $url, $headerData, $obj);