Shulou(Shulou.com)06/01 Report--

Application background

The names of multiple applications are assumed to be An and B, which prohibit users from logging in from A / B at the same time.

Realization idea

Set two unordered sets a_set, b_set

A / b executes when logging in

$redis- > sAdd ('ajar setter sRem); / A log in to $redis- > sRem (' bouncy setter dagger camera UserID); / / kick Blockrediss-> sAdd ('bouncy setter requlibility UserID); / B Log in to $redis- > sRem (' aholysetter reflexive UserID); / / kick A

Before api acquires data, determine whether the id of this end is online (the api of the two sides of the AB is separate)

A judgment:

If ($redis- > sIsmember) {/ / true} else {/ / false}

B judgment

If ($redis- > sIsmember ('baked setbacks grammatical user ID)) {/ / true} else {/ / false}

The methods used are:

When the sadd key_set value setting value is set to the sismember key_set value judgment value in set, there is a srem key_set value in key_set to remove the specified value smembers key_set to get all value.

The above are the details of the method of prohibiting multi-side login based on Redis unordered collection, please pay more attention to other related articles!

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