Is that possible that with cURL not every user use the same cookie?
Because it\'s cool that I store the cookie that I get, but this cookie will be used by everybody,
Your question is unclear, do you want all user to use the same cookie or not ? What is an user in your case, a visitor on your website ?
In any case, you can set which file curl will use to save/load its cookies using curl_setopt and the CURLOPT_COOKIE* constants.