wp_cache_set()

wp_cache_set() — Saves the data to the cache. Differs from wp_cache_add() and wp_cache_replace() in that it will always write data.

Inputs: $key (int|string): The cache key to use for retrieval later. $data (mixed): The contents to store in the cache. $group (string): Optional. Where to group the cache contents. Enables the same key to be used across groups. Default empty. $expire (int): Optional. When to expire the cache contents, in seconds. Default 0 (no expiration).

Returns bool: True on success, false on failure.