I wonder that in which versions(php redis extension), cases of function name have changed ? like this:
$redis = new Redis();
$redis -> smembers($key);
$redis -> sMembers($key);
The branch release 1.1 of phpredis had the syntax of
However the current develop phpredis has the new syntax of
I am not sure if that's what you were looking for, however I recommend adjusting all old code to the new syntax for future support.