I have the cookie: twid which is returning in the browser as well.
%22u%3D859186139894337536%22
I would like to just get this:
859186139894337536
You can do this in PHP .
PS: I'm getting cookies of Twitter via cURL .
First you should use urldecode to remove the URL characters from your string.
$var = urldecode("%22u%3D859186139894337536%22");
After this you can use the filter_var function that filters your string and returns what you specify:
$var = filter_var($var, FILTER_SANITIZE_NUMBER_INT);
print_r($var);