Hope to increase the connection status of checking Memcached

[number201724]

framework/src/Illuminate/Cache/MemcachedStore.php

Line 59 in aeea9ff

$value = $this->memcached->get($this->prefix.$key);

I hope to increase the checking of the connection status of Memcached. If Memcached is not started, it will waste a lot of time to debug the program.

For example: session is not obtained successfully, and no error is reported.