How to use pre_option_option filter in WordPress

pre_option_option filter

The dynamic portion of the hook name, $option, refers to the option name.

To use pre_option_option 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 modify_pre_option_option_defaults which takes 3 parameters and we registered using add_filter. The first parameter pre_option_option is the name of the hook, the second parameter modify_pre_option_option_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 pre_option_option filter.

Parameters

Below are the 3 parameters required to use this hook.

• $pre_option: (mixed) The value to return instead of the option value. This differs from $default, which is used as the fallback value in the event the option doesn’t exist elsewhere in get_option(). Default false (to skip past the short-circuit).
• $option: (string) Option name.
• $default: (mixed) The fallback value to return if the option does not exist. Default false.

Live Example

    /**
     * Filters the blogname option on the homepage.
     *
     * @param false|mixed $value   Pre-option value. Default false.
     * @return false|mixed (Maybe) filtered pre-option value.
     */
    function wp_docs_pre_filter_option( $pre_option ) {
        if ( ! is_home() ) {
            return $pre_option;
        }
    }

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

Example 1: Modify pre_option_option_defaults

This example shows how to modify the pre_option_option_defaults based on your website requirements.

    function weplugins_modify_pre_option_option_defaults($pre_option, $option, $default) { 
        // Update the $pre_option variable according to your website requirements and return this variable. 
        // You can modify the $pre_option variable conditionally too if you want.
        return $pre_option; 
    }
    // add the filter
    add_filter( "pre_option_option", "weplugins_modify_pre_option_option_defaults", 10, 3 );
    

Example 2: Remove a Hook Callback

To remove a hook callback, use the example below.

    remove_filter( "pre_option_option", "weplugins_modify_pre_option_option_defaults", 10, 3 );
    

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

Example 3: Conditional Modification

In this example, we modify the pre_option_option variable conditionally based on whether the homepage is being viewed.

    function weplugins_conditional_pre_option_option($pre_option, $option, $default) {
        if ( is_home() ) {
            return 'Modified Value';
        }
        return $pre_option;
    }
    add_filter( "pre_option_option", "weplugins_conditional_pre_option_option", 10, 3 );
    

Contact Us

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