How to use pre_redirect_guess_404_permalink filter in WordPress

pre_redirect_guess_404_permalink filter

Returning a non-null value from the filter will effectively short-circuit the URL guessing, returning the passed value instead.

To use the pre_redirect_guess_404_permalink 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 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_pre_redirect_guess_404_permalink_defaults which takes 1 parameter and we registered it using add_filter. The first parameter pre_redirect_guess_404_permalink is the name of the hook, the second parameter weplugins_modify_pre_redirect_guess_404_permalink_defaults is the name of the function which 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 the pre_redirect_guess_404_permalink filter.

Parameters

Below the 1 parameter is required to use this hook.

• $pre: (null|string|false) Whether to short-circuit guessing the redirect for a 404. Default null to continue with the URL guessing.

Live Examples

Example 1: Basic Usage

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

    function weplugins_modify_pre_redirect_guess_404_permalink_defaults($pre) { 
        // Update the $pre variable according to your website requirements and return this variable. 
        // You can modify the $pre variable conditionally too if you want.
        return $pre; 
    }
    // Add the filter
    add_filter( "pre_redirect_guess_404_permalink", "weplugins_modify_pre_redirect_guess_404_permalink_defaults", 10, 1 );
    

Example 2: Removing the Hook Callback

To remove a hook callback, use the example below.

    remove_filter( "pre_redirect_guess_404_permalink", "weplugins_modify_pre_redirect_guess_404_permalink_defaults", 10, 1 );
    

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

Example 3: Conditional Modification

This example shows how to conditionally modify the $pre variable.

    function weplugins_modify_pre_redirect_guess_404_permalink_conditionally($pre) { 
        if (is_404()) {
            // Custom logic for 404 pages
            $pre = 'custom-url';
        }
        return $pre; 
    }
    // Add the filter
    add_filter( "pre_redirect_guess_404_permalink", "weplugins_modify_pre_redirect_guess_404_permalink_conditionally", 10, 1 );
    

Contact Us

If you’re having any trouble using this hook, please contact us and we’d be happy to assist you.