How to use posts_request_ids filter in WordPress

posts_request_ids filter

Filters the Post IDs SQL request before sending.

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

We at WePlugins 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 `weplugins_modify_posts_request_ids_defaults` which takes 2 parameters and we registered using `add_filter`. The first parameter `posts_request_ids` is the name of the hook, the second parameter `weplugins_modify_posts_request_ids_defaults` is the name of the function that needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use `remove_filter` to remove `posts_request_ids` filter.

Parameters

Below are the 2 parameters required to use this hook.

• $request : (string) The post ID request.
• $query : (WP_Query) The WP_Query instance.

Live Example

apply_filters( 'posts_request_ids', string $request, WP_Query $query )

Below is an example of how you can use this hook.

    function weplugins_modify_posts_request_ids_defaults($request, $query) {
    
        // Update the $request variable according to your website requirements and return this variable. You can modify the $request variable conditionally too if you want.
    
        return $request;
    }
    // add the filter
    add_filter( "posts_request_ids", "weplugins_modify_posts_request_ids_defaults", 10, 2 );

To remove a hook callback, use the example below.

remove_filter( "posts_request_ids", "weplugins_modify_posts_request_ids_defaults", 10, 2 );

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

Example 1: Modifying Post IDs Request

This example demonstrates how to modify the post IDs request based on a custom condition.

    function weplugins_modify_posts_request_ids_example1($request, $query) {
        if ($query->is_home()) {
            $request = str_replace('SELECT', 'SELECT DISTINCT', $request);
        }
        return $request;
    }
    add_filter("posts_request_ids", "weplugins_modify_posts_request_ids_example1", 10, 2);
    

Example 2: Adding Custom SQL Conditions

In this example, we add custom SQL conditions to the post IDs request.

    function weplugins_modify_posts_request_ids_example2($request, $query) {
        if ($query->is_category()) {
            $request .= " AND wp_posts.post_type = 'custom_type'";
        }
        return $request;
    }
    add_filter("posts_request_ids", "weplugins_modify_posts_request_ids_example2", 10, 2);
    

Example 3: Using Custom Parameters

This example shows how to use custom parameters to modify the post IDs request.

    function weplugins_modify_posts_request_ids_example3($request, $query) {
        if ($query->query_vars['custom_param']) {
            $request .= " AND wp_posts.meta_key = 'custom_value'";
        }
        return $request;
    }
    add_filter("posts_request_ids", "weplugins_modify_posts_request_ids_example3", 10, 2);
    

Contact Us

If you need any customization or have any queries, feel free to Contact Us.