/**
 * Verifies if passed URL (remote file or any webpage / webresource) exists
 * The check is implemented via method HEAD, so no data is downloaded anyway
 *
 * @param   <string> Remote URL to verify
 * @returns <bool>   Returns true if given URL exists, false otherwise
 */
function file_exists_remote (string $url) : bool
{
    $handle = curl_init();

    curl_setopt_array($handle, [
        CURLOPT_URL => $url,
        CURLOPT_SSL_VERIFYPEER => 0,
        CURLOPT_NOBODY => 1,
        CURLOPT_HEADER => 0,
        CURLOPT_RETURNTRANSFER => 1,
        CURLOPT_FOLLOWLOCATION => 1,
        CURLOPT_AUTOREFERER => 1
    ]);

    curl_exec($handle);

    $responseCode = (int) curl_getinfo($handle, CURLINFO_RESPONSE_CODE);

    curl_close($handle);

    return $responseCode === 200;
}