Update README.md

README.md

@@ -91,9 +91,9 @@ $result = $tfa->verifyCode($_SESSION['secret'], $_POST['verification']);
 
 `verifyCode()` will return either `true` (the code was valid) or `false` (the code was invalid; no points for you!). You may need to store `$secret` in a `$_SESSION` or other persistent storage between requests. The `verifyCode()` accepts, aside from `$secret` and `$code`, three more arguments. The first being `$discrepancy`. Since TOTP codes are based on time("slices") it is very important that the server (but also client) have a correct date/time. But because the two *may* differ a bit we usually allow a certain amount of leeway. Because generated codes are valid for a specific period (remember the `$period` argument in the `TwoFactorAuth`'s constructor?) we usually check the period directly before and the period directly after the current time when validating codes. So when the current time is `14:34:21`, which results in a 'current timeslice' of `14:34:00` to `14:34:30` we also calculate/verify the codes for `14:33:30` to `14:34:00` and for `14:34:30` to `14:35:00`. This gives us a 'window' of `14:33:30` to `14:35:00`. The `$discrepancy` argument specifies how many periods (or: timeslices) we check in either direction of the current time. The default `$discrepancy` of `1` results in (max.) 3 period checks: -1, current and +1 period. A `$discrepancy` of `4` would result in a larger window (or: bigger time difference between client and server) of -4, -3, -2, -1, current, +1, +2, +3 and +4 periods.
 
-The second argument `$time` allows you to check a code for a specific point in time. This argument has no real practical use but can be handy for unittesting etc. The default value, `null`, means: use the current time.
+The second, `$time`, allows you to check a code for a specific point in time. This argument has no real practical use but can be handy for unittesting etc. The default value, `null`, means: use the current time.
 
-The third argument `$timeslice` is an out-argument; the value returned in `$timeslice` is the value of the timeslice that matched the code (if any). This value will be 0 when the code doesn't match and non-zero when the code matches. This value can be stored with the user and can be used to prevent replay-attacks. All you need to do is, on successful login, make sure `$timeslice` is greater than the previously stored timeslice.
+The third, `$timeslice`, is an out-argument; the value returned in `$timeslice` is the value of the timeslice that matched the code (if any). This value will be 0 when the code doesn't match and non-zero when the code matches. This value can be stored with the user and can be used to prevent replay-attacks. All you need to do is, on successful login, make sure `$timeslice` is greater than the previously stored timeslice.
 
 ### Step 3: Store `$secret` with user and we're done!