Exciting News! Flipper Code is now WePlugins! Same commitment to excellence, brand new identity.

How to use request filter in WordPress

Sandeep Kumar Mishra
Sandeep Kumar Mishra
July 12, 2022
5 minutes read
Share Via:

request filter

Filters the array of parsed query variables.

To use request filter, first you have to register it using add_filter. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

We at Flipper Code, always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function modify_request_defaults which takes 1 parameters and we registered using add_filter. The first parameter request is name of the hook, The second parameter modify_request_defaults is name of the function which need to be called, third parameter is the priority of calling the hook if same hook is used multiple times and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometime, you have to remove a registered hook so you can use remove_filter to remove request filter.

Parameters

    Below the 1 parameter is required to use this hook.

  • $query_vars : (array) The array of requested query variables.

Live Example

add_filter( 'request', 'alter_the_query' );
 function alter_the_query( $request ) {
    $dummy_query = new WP_Query();  // the query isn't run if we don't pass any query vars
    $dummy_query->parse_query( $request );
     // this is the actual manipulation; do whatever you need here
    if ( $dummy_query->is_home() )
        $request['category_name'] = 'news';
     return $request;
}

Below is an example how you can use this hook.

                        function modify_request_defaults($query_vars) { 
   
                            // Update the $query_vars variable according to your website requirements and return this variable. You can modify the $query_vars variable conditionally too if you want.

                            return $query_vars; 
                        }
                        // add the filter
                        add_filter( "request", "modify_request_defaults", 10, 1 );

To remove a hook callback, use the example below.

remove_filter( "request", "modify_request_defaults", 10, 1 );

Please make sure provide the same callback function name, priority and number of arguments while removing the hook callback.

Flipper Code is a Premium WordPress Plugins development company and integrating new functionalites into WordPress sites in form of custom WordPress Plugins since 2012. If you’re having any trouble using this hook, please contact our WordPress Development Team and we’d be happy to assist you.

Explore the latest in WordPress

Trying to stay on top of it all? Get the best tools, resources and inspiration sent to your inbox every Wednesday.