Example: Cache API

Same name in other branches
  1. 3.x modules/cache_example/cache_example.module \cache_example
  2. 4.0.x modules/cache_example/cache_example.module \cache_example

Outlines how a module can use the Cache API.

Cache API allows us to cache data that is heavy to calculate. As this can significantly speed up the Drupal site, it is recommended to use cache mechanism when it is appropriate.

Cache in Drupal is very easy to use. This example will search entire Drupal folder and display all files. Since this operation includes filesystem it can take a while. This list will not change much on production websites, so we decide to cache it.

See also

cache_get()

cache_set()

cache_clear_all()

Parent topics

Examples
Well-documented API examples for a broad range of Drupal 7 core
functionality.

File

cache_example/cache_example.module, line 10

Functions

Title File name Summary
cache_example_form_cache_clearing cache_example/cache_example.module Submit handler to demonstrate the various uses of cache_clear_all().
cache_example_form_create_expiring_item cache_example/cache_example.module Submit handler to create a new cache item with specified expiration.
cache_example_form_expire_files cache_example/cache_example.module Submit handler that explicitly clears cache_example_files_count from cache.
cache_example_menu cache_example/cache_example.module Implements hook_menu().
cache_example_page_form cache_example/cache_example.module Main page for cache_example.

Classes

Title File name Summary
CacheExampleTestCase cache_example/cache_example.test Functional tests for the Cache Example module.