remove file check

function checkRemoteFile($url) {
    $ch = curl_init();
   
    curl_setopt($ch, CURLOPT_URL, $url);
    // don't download content
    curl_setopt($ch, CURLOPT_NOBODY, 1);
    curl_setopt($ch, CURLOPT_FAILONERROR, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    if (curl_exec($ch) !== FALSE) {
        return true;
    } else {
        return false;
    }
}