Update curl file upload to use new PHP7 CurlFile feature

[elimentz]

PHP 5.5 introduced a CurlFile object that deprecates the old @filename syntax See: https://wiki.php.net/rfc/curl-file-upload for details

function getCurlFileValue($filename, $contentType, $postname) 
{
    if (function_exists('curl_file_create')) {
        return curl_file_create($filename, $contentType, $postname);
    }
    // Use the old style if using an older version of PHP
    $value = "@{$filename};filename=" . $postname;
    if ($contentType) {
        $value .= ';type=' . $contentType;
    }
    return $value;
}

[elimentz]

Done in v 6.12.0, see documentation for details:

For sending files via a POST request, you can use the withFile method to correctly format a request before sending:

    use Ixudra\Curl\Facades\Curl;

    $response = Curl::to('http://foo.com/bar')
        ->withData( array( 'Foo' => 'Bar' ) )
        ->withFile( 'image_1', '/path/to/dir/image1.png', 'image/png', 'imageName1.png' )
        ->withFile( 'image_2', '/path/to/dir/image2.png', 'image/png', 'imageName2.png' )
        ->post();

You can add as many files to the request as you want. A couple of things to keep in mind:

• When submitting files, the asJson() method and asJsonRequest() method cannot be used. If you do, the files will not be transferred correctly
• The files are added to the data that was provided in the withData() method using the first parameter of the withFile() method. If this key already exists, it will be overridden.