wp_clear_object_cache() is deprecated. What should I use instead?

Question

Today I noticed that \WP_CLI\Utils\wp_clear_object_cache() has been marked as deprecated in WP-CLI 1.5.0. The release notes don't mention anything about it. What should be used, instead? Do I still need to take care of flushing the cache myself or is it handled automatically now, like mentioned here?

Answer 1

The function wp_cache_flush() should help you but is not the same one.

The function runs on the global $wp_object_cache and set a new empty array, different to the WP CLI deprecated function wp_clear_object_cache for different keys of the global var.

function wp_clear_object_cache() {
    global $wpdb, $wp_object_cache;

    $wpdb->queries = [];

    if ( ! is_object( $wp_object_cache ) ) {
        return;
    }

    // The following are Memcached (Redux) plugin specific (see https://core.trac.wordpress.org/ticket/31463).
    if ( isset( $wp_object_cache->group_ops ) ) {
        $wp_object_cache->group_ops = [];
    }
    if ( isset( $wp_object_cache->stats ) ) {
        $wp_object_cache->stats = [];
    }
    if ( isset( $wp_object_cache->memcache_debug ) ) {
        $wp_object_cache->memcache_debug = [];
    }
    // Used by `WP_Object_Cache` also.
    if ( isset( $wp_object_cache->cache ) ) {
        $wp_object_cache->cache = [];
    }
}

Note: The deprecated flag should be wrong, and the maintenance team will change them in a future version. That is information after a small talk with the team.