What is WordPress Hook: wp_{$post->post_type}_revisions_to_keep
The wp_{$post->post_type}_revisions_to_keep hook in WordPress is used to control the number of revisions to keep for a specific post type. This hook allows developers to customize the number of revisions that are saved for each post type, helping to optimize database storage and improve site performance.
Understanding the Hook: wp_{$post->post_type}_revisions_to_keep
The wp_{$post->post_type}_revisions_to_keep hook is located within the WordPress process that handles post revisions. It provides a way for developers to modify the default number of revisions to keep for a specific post type, giving them greater control over the revision system.
Hook Parameters (if applicable): wp_{$post->post_type}_revisions_to_keep
The wp_{$post->post_type}_revisions_to_keep hook accepts parameters that include the default number of revisions to keep for a specific post type. Developers can modify this parameter to set a custom number of revisions to keep for each post type.
Hook Doesn’t Work: wp_{$post->post_type}_revisions_to_keep
If the wp_{$post->post_type}_revisions_to_keep hook doesn’t work as expected, it may be due to conflicts with other plugins or themes that also modify the revision system. To troubleshoot, developers should deactivate other plugins and switch to a default theme to see if the issue persists. Additionally, checking for syntax errors in the code implementing the hook is recommended.
Best Practices & Usage Notes (if applicable): wp_{$post->post_type}_revisions_to_keep
When using the wp_{$post->post_type}_revisions_to_keep hook, it’s important to consider the impact on database storage and site performance. Setting a high number of revisions to keep can lead to increased database size, while setting a low number may limit the ability to revert to previous versions of a post. It’s best practice to find a balance that meets the needs of the site while optimizing performance.
Usage Example: wp_{$post->post_type}_revisions_to_keep
“`php
function custom_post_type_revisions_to_keep( $num, $post ) {
if ( ‘product’ === $post->post_type ) {
return 5; // Keep 5 revisions for the ‘product’ post type
}
return $num; // Return the default number of revisions for other post types
}
add_filter( ‘wp_revisions_to_keep’, ‘custom_post_type_revisions_to_keep’, 10, 2 );
“`
