Utilizing Arrays in cURL POST Requests

To enable array support in the provided code, a critical adjustment needs to be made. The incorrect array formatting leads to the loss of the second 'images' value when received at the API.

The correction lies in constructing the array correctly. Instead of creating individual 'images[]' key-value pairs, use a single 'images' key and assign it an array of the encoded image values.

$fields = array(
    'username' => "annonymous",
    'api_key' => urlencode("1234"),
    'images' => array(
        urlencode(base64_encode('image1')),
        urlencode(base64_encode('image2'))
    )
);

Alternatively, you can use the 'http_build_query' function to conveniently assemble the POST data:

$fields = array(
    'username' => "annonymous",
    'api_key' => urlencode("1234"),
    'images' => array(
        urlencode(base64_encode('image1')),
        urlencode(base64_encode('image2'))
    )
);
$fields_string = http_build_query($fields);

With these modifications, your cURL POST request will correctly send an array of images and receive the expected data structure at the API end.