predisHow do I check if a Redis key exists using PHP?

To check if a Redis key exists using PHP, you can use the exists method of the Redis class. This method takes the name of the key as an argument and returns a boolean value indicating whether the key exists or not.

Example code

<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

$key = 'mykey';

if ($redis->exists($key)) {
    echo "Key exists";
} else {
    echo "Key does not exist";
}

Output example

Key does not exist

The code above does the following:

1. Creates a new Redis instance and connects to the Redis server.
2. Sets the variable $key to the name of the key we want to check.
3. Checks if the key exists using the exists method and prints out the result.

Helpful links

• Redis::exists

Edit this code on GitHub