How to use post_limits_request filter in WordPress

Hey there! As a fellow WordPress enthusiast, I’m excited to dive into the post_limits_request filter with you. This hook is super handy for those working with caching plugins or needing to tweak the LIMIT clause in their queries. Let’s break it down!

post_limits_request filter

This filter applies to the LIMIT clause of the query before it’s sent to the database, allowing you to define a new query LIMIT.

apply_filters_ref_array( 'post_limits_request', string $limits, WP_Query $query )

Description

The post_limits_request hook is primarily used in caching plugins. By applying this filter to the LIMIT clause of a query before it’s sent to the database, you can define a new query LIMIT.

Parameters

• $limits : (string) The LIMIT clause of the query.
• $query : (WP_Query) The WP_Query instance (passed by reference).

Live Examples

Basic Hook Application

Here’s a simple example of how to apply the post_limits_request filter:

$array = apply_filters( 'post_limits_request', $array); 
                         
if ( !empty( $array ) ) { 
                         
   // everything has led up to this point... 
                         
} 

Adding a Hook Callback

To add a callback function to the hook, you can use the following code:

add_filter( 'post_limits_request', 'weplugins_post_limits_request_filter', 10, 2 );

/**
 * Function for `post_limits_request` filter-hook.
 * 
 * @param string   $limits The LIMIT clause of the query.
 * @param WP_Query $query  The WP_Query instance (passed by reference).
 *
 * @return string
 */
function weplugins_post_limits_request_filter( $limits, $query ){

	// filter...
	return $limits;
}

Removing a Hook Callback

If you need to remove a previously added callback, here’s how you can do it:

// remove the filter 
remove_filter( 'post_limits_request', 'weplugins_post_limits_request_filter', 10, 2 ); 

Contact Us

If you need any customization or assistance with this hook, feel free to contact us.