In PHP, using Redis to store data can be extremely beneficial for caching, session storage, and more. Often, you may need to retrieve all keys and their associated values from a Redis database for various reasons such as debugging, data analysis, or system monitoring.
$redis = new Redis(); $redis->connect('localhost', 6379); $keys = $redis->keys('*'); print_r($keys);
In this example, we first establish a connection to the Redis server. The keys('*')
function retrieves all keys from the Redis server.
$redis = new Redis(); $redis->connect('localhost', 6379); $keys = $redis->keys('*'); foreach ($keys as $key) { $value = $redis->get($key); echo "Key: {$key}, Value: {$value}\n"; }
After getting all keys, we loop through each key and use the get()
function to retrieve its corresponding value.
keys('*')
command in a production environment because it can degrade performance. Use it sparingly or during maintenance periods.keys(pattern)
function where possible to avoid unnecessary hits to the database.1. How can I filter keys in Redis using PHP?
In PHP, you can filter keys in Redis by passing a pattern to the keys(pattern)
function.
2. What happens when I try to get a value of a key that doesn't exist?
If you try to get a value of a key that does not exist, Redis will return NULL
.
Dragonfly is fully compatible with the Redis ecosystem and requires no code changes to implement.