Reasons and Countermeasures for ThinkPHP's session being unable to obtain session in different ways in the same controller

1.（ recommend ） Use TP5 Built in cache method

    Can perfectly replace session, You can even set the time manually for each , Than session More convenient ,

（ Used to tp5 Bring their own session Of course ,session Time is usually fixed , Very stiff to use ）.

// Set the cache （ The period of validity 3600 second ）

Cache::set('name',$value,3600);

// To get cached data, you can use ：

Cache::get('name');

As a reminder , If $value If it is an array, you have to json_encode() Encode it into a string and then

2.Redis Method （ This method is a little more cumbersome ）

Follow the tutorial to configure on the server redis database

Use the method directly to the code ：

// Deposit in redis
// Turn on redis Database services 
$redis = new Redis();
// Connect ridis database 
$redis->connect('127.0.0.1', 6379);
// In the data ( The period of validity 3600 second )
$redis->set($sessioncode,$value, 3600);


// Take out redis
// Turn on redis Database services 
$redis = new Redis();
// Connect ridis database 
$redis->connect('127.0.0.1', 6379);
// Take out the data 
$data = $redis->get($session);

Again , As a reminder , If $value If it is an array, you have to json_encode() Encode it into a string and then

3. Use memcache