How do I read and verify if there are images that are on my PHP server but by HTTPS?

Question

I want to check my images on my server, and I have another subdomain to save the images but they are served with HTTPS

It only works locally, but not remotely by HTTPS, as it always prints "exists directory".

$foto = "https://subdomain.example.com/images/" . $var . "/" . $var2. "/flayer";

if (file_exists($foto . ".jpg")) {
    echo "HELLO WORL";
}

if (glob($foto . ".*")) {
    if (file_exists($foto . ".jpg")) {
        $ruta = "https://subdomain.example.com/images/". $var . "/" . $var2 . "/flayer.jpg";
    }else{ 
        echo "no exists";
    }
}else{
    echo "no exists on directory";
}

Answer 1

i test with 2 options

   function remote_file_exists($url, $ext) {
    $ch = curl_init($url . $ext);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    if ($httpCode == 200) {
        return true;
    }
}

AND

    function remote($url, $ext) {
    if (@exif_imagetype($url . $ext)) {
        return true;
    } else {
        return false;
    }
}

Works but is so slow, something to do it more fast?