PHP CURL - REST PUT

   $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $ticket_location);
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-type: text/xml"));

    $xml = "<ticket><comment><value>$value</value><is_public>$is_public</is_public></comment><uploads>$token</uploads></ticket>";
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); 

    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
    curl_setopt($ch, CURLOPT_USERPWD, "$email:$password");
    curl_exec($ch);
    curl_close($ch);

Tried this, but the value not pass, also use this {$value}, but the value not updated same like before any idea?