php - CURL problèmes création de cookie - Stack Overflow

I am having a lot of difficulty using cookies with curl. I am trying to create a function that uses CURL to log into a site and sets the session cookie using the CURLOPT_COOKIEJAR. I am having a lot of difficulty accomplishing this. When I go to c:/var/cookie.txt, no cookie file is created.

I appreciate any suggestions as to why this is, thanks in advance!

    function loginAndGetCookie(){
        $ch = curl_init();

        $fields = getPostData();
        $fields_string = getFieldsString();

        $url = 'https://account.site.com/Account/Login.aspx';

       curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
       curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
       curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
       curl_setopt($ch, CURLOPT_POST, true);
       curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
       curl_setopt($ch, CURLOPT_COOKIEFILE, 'c:\var\cookie.txt');
       curl_setopt($ch, CURLOPT_COOKIEJAR, 'c:\var\cookie.txt');

       curl_setopt($ch, CURLOPT_URL, $url);

       $content = curl_exec($ch);

       echo htmlentities($content);

       curl_close($ch); 
    }
    loginAndGetCookie();

I am having a lot of difficulty using cookies with curl. I am trying to create a function that uses CURL to log into a site and sets the session cookie using the CURLOPT_COOKIEJAR. I am having a lot of difficulty accomplishing this. When I go to c:/var/cookie.txt, no cookie file is created.

I appreciate any suggestions as to why this is, thanks in advance!

    function loginAndGetCookie(){
        $ch = curl_init();

        $fields = getPostData();
        $fields_string = getFieldsString();

        $url = 'https://account.site.com/Account/Login.aspx';

       curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
       curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
       curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
       curl_setopt($ch, CURLOPT_POST, true);
       curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
       curl_setopt($ch, CURLOPT_COOKIEFILE, 'c:\var\cookie.txt');
       curl_setopt($ch, CURLOPT_COOKIEJAR, 'c:\var\cookie.txt');

       curl_setopt($ch, CURLOPT_URL, $url);

       $content = curl_exec($ch);

       echo htmlentities($content);

       curl_close($ch); 
    }
    loginAndGetCookie();

Source