Well! We’ll start by executing the function which helps to get content from the cache. Using the group and key, you can take contents from the cache.
$key: Here’s where you will store the contents of cache
$group: ” is the default value for the group. It helps to group the contents of cache
$force: False is the default value for force. Just by using this parameter, you can force the cache contents from the persistent one.
$found: Null is the default value for the string $found. It helps to check the key in the cache.
Return: When retrieving the cache, the result may be false.
Source:
How to retrieve the cached content?
You are known well that cache stores all the contents. There is an option to add WordPress to the cache for retrieving the data. This step helps to retrieve data from the cache and won’t be from DB.
Later, you won’t get that much database request. Execute the command to retrieve the cache metadata:
How to save your data in the cache so, that later can you retrieve it?
Yes! It’s possible! If you have a database query in heavy mode, of course, you need to search on all the pages. By doing this, it would be saved in the cache so that easy to retrieve whenever needed.
On one page, you can retrieve it many times by eliminating some database queries:
That's it! You were done with this part now!
Code:
wp_cache_get( int|string $key, string $group = ”, bool $force = false, bool $found = null )$group: ” is the default value for the group. It helps to group the contents of cache
$force: False is the default value for force. Just by using this parameter, you can force the cache contents from the persistent one.
$found: Null is the default value for the string $found. It helps to check the key in the cache.
Return: When retrieving the cache, the result may be false.
Source:
Code:
File: wp-includes/cache.php
function wp_cache_get( $key, $group= '', $force= false, &$found= null ){
global$wp_object_cache;
return$wp_object_cache->get( $key, $group, $force, $found);
}You are known well that cache stores all the contents. There is an option to add WordPress to the cache for retrieving the data. This step helps to retrieve data from the cache and won’t be from DB.
Later, you won’t get that much database request. Execute the command to retrieve the cache metadata:
Code:
$user_meta = wp_cache_get( 1, 'user_meta' );Yes! It’s possible! If you have a database query in heavy mode, of course, you need to search on all the pages. By doing this, it would be saved in the cache so that easy to retrieve whenever needed.
On one page, you can retrieve it many times by eliminating some database queries:
Code:
$cache_key = 'my_db_result'; // Do a database query and save it to the cache if the there is no cache data with this key: $my_db_result = wp_cache_get( $cache_key ); if( false === $my_db_result ){ global $wpdb; $my_db_result = $wpdb->get_results("SELECT * FROM $wpdb->posts WHERE post_type = 'books'"); wp_cache_set( $cache_key, $my_db_result ); } // $my_db_result has the same content as the cache print_r( $my_db_result );
