How to use default_option_option filter in WordPress

default_option_option Filter

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

To use the default_option_option 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_default_option_option_defaults which takes 3 parameters and is registered using add_filter. The first parameter default_option_option is the name of the hook, the second parameter weplugins_modify_default_option_option_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 default_option_option filter.

Parameters

Below are the 3 parameters required to use this hook.

• $default: (mixed) The default value to return if the option does not exist in the database.
• $option: (string) Option name.
• $passed_default: (bool) Was get_option() passed a default value?

Live Example

apply_filters( "default_option_{$option}", mixed $default, string $option, bool $passed_default )

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

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

Example 1: Custom Default Value for a Specific Option

In this example, we will modify the default value of a specific option.

    function weplugins_modify_default_option_option_example1($default, $option, $passed_default) { 
        if ($option === 'my_custom_option') {
            return 'my_new_default_value'; 
        }
        return $default; 
    }
    add_filter( "default_option_option", "weplugins_modify_default_option_option_example1", 10, 3 );
    

Example 2: Conditional Default Value Based on Passed Default

Here, we modify the default value conditionally based on whether a default value was passed or not.

    function weplugins_modify_default_option_option_example2($default, $option, $passed_default) { 
        if ($passed_default) {
            return 'default_passed_value'; 
        }
        return $default; 
    }
    add_filter( "default_option_option", "weplugins_modify_default_option_option_example2", 10, 3 );
    

Example 3: Logging Default Option Usage

This example logs when a default option is used for debugging purposes.

    function weplugins_modify_default_option_option_example3($default, $option, $passed_default) { 
        error_log("Default option used for: " . $option);
        return $default; 
    }
    add_filter( "default_option_option", "weplugins_modify_default_option_option_example3", 10, 3 );
    

To remove a hook callback, use the example below.

remove_filter( "default_option_option", "weplugins_modify_default_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.

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