This article describes how to use Redis on the following hosting packages:
Redis is an open-source memory object caching system that web sites can use to help accelerate page load times. Redis caches in RAM frequently accessed data, such as the results of API calls, database calls, and more.
Redis can significantly help improve site performance.
Redis is installed and ready to use on managed VPS and managed Dedicated servers.
You can connect to Redis using the following parameters:
To verify Redis is running, type the following command:
systemctl status redis
You can also use the redis-cli program to connect to Redis directly.
For example, the following commands demonstrate how to use redis-cli to dump all of the cached key-value pairs, and then display rolling statistics for Redis:
redis-cli KEYS '*' redis-cli --stat
To clear the entire Redis cache at once, type the following command:
There are numerous PHP libraries available for integration with Redis. The following procedure demonstrates how to use the Predis library to connect to Redis and store a key/value pair:
cd ~ composer require predis/predis
Using your preferred text editor, create a file named redis-test.php. Copy and then paste the following code into the redis-test.php file:
<?php require './vendor/predis/predis/autoload.php'; Predis\Autoloader::register(); $client = new Predis\Client(); $client->set('test', 'hello'); $value = $client->get('test'); print "test = " . $value . "\n"; ?>
Type the following command to run the script:
You should receive the following output:
test = hello
To confirm the key/value pair is stored in the Redis cache, type the following command:
redis-cli GET test
For more information about how to use PHP with Redis, please visit https://docs.redis.com/latest/rs/references/client_references/client_php.
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