HSET command in Redis is used to set the value of a field in a hash stored at a key. A common use case for this is storing object-like data, where each object has a unique ID and various attributes. For instance, you could store details about a user, with fields like username, email, and password.
Let's look at an example using the PHP Redis extension. First, we need to establish a connection to the Redis server:
Then, we can use the
hSet method to set a field in a hash:
In this example, 'user:1' is the key of the hash, 'name' is the field, and 'John Doe' is the value that we're setting for that field.
We can also set multiple fields at once:
hSetfunction. It returns
1if the field is a new field in the hash and the value was set. If the field already exists, and the value was updated, it returns
Q: Can I use
hSet to update multiple fields at once?
A: Yes, you can use the
hMSet function to set multiple fields at once.
Q: What data types can I store with
A: You can store strings, integers, and floating point numbers. Note that they will all be stored as strings and converted back when retrieved.