PHP developers often use a Redis cache to increase the performance of their applications by storing frequently accessed dataset. However, there are times when you might need to delete certain keys or even all keys from the Redis cache. This operation could be implemented during development/testing phase or when the cached data becomes stale and needs to be refreshed.
In PHP, you can use
del method of Redis class to delete a key from the Redis cache:
This code connects to the Redis server running on localhost at port 6379, and deletes the key named 'key'.
You can also delete multiple keys at once:
This code deletes the keys 'key1', 'key2', and 'key3'.
To delete all keys from the Redis cache, you can use the
flushAllcommands that can affect performance.
No, once a key is deleted, it cannot be recovered.
del method deletes specific keys from the Redis cache while
flushAll deletes all keys.