Weird question, how can I run a custom function AFTER my theme settings are saved? I see that the register_settings() function has a sanitize callback, but that runs before the settings are changed. I need something to run after they're saved. Is there an action or filter I can use to do that?


SO I have this setting I made:

    'kjd_body_background_settings_section', // ID hook name
    null, // label
    null, // function name
    'kjd_body_background_settings' // page name

        'kjd_body_background_colors', // ID hook name
        null, //label
        null, //callback
        'kjd_body_background_settings', // page name
        'kjd_body_background_settings_section' // parent section 

and this function:

function kjd_update_stylesheet( $oldvalue, $_newvalue ){
   echo 'updated!';
add_action('update_options_kjd_body_background_settings','kjd_update_stylesheet',10, 2);

//add_action('update_options_kjd_body_background_colors','kjd_update_stylesheet',10, 2);

1 Answer 1


Use the filter update_option_{$option}. It runs after a successful saving.

$option is the name of your option, and you get the old and the new value as parameters.

From wp-includes/option.php:

do_action( "update_option_{$option}", $oldvalue, $_newvalue );

Use it like this for an option wpse_themesettings:

add_action( 'update_option_wpse_themesettings', 'wpse_check_settings', 10, 2 );

function wpse_check_settings( $old_value, $new_value )
    // do something
  • Hmmm ok. So if I have dozens of options, over dozens of pages/options groups I would have to make a hidden option for each page to run the same function?
    – rugbert
    Aug 12, 2013 at 11:42
  • No, you just use the names of the options you want to save. No extra hidden options.
    – fuxia
    Aug 12, 2013 at 12:04
  • yeah I thought of that on my way into work and said "duh"! Thanks for the answer though, you just made my project 100% more awesome
    – rugbert
    Aug 12, 2013 at 14:10
  • Hey, just so we are clear. When you say to use update_option{$option} you mean the $page argument in the register_settings() function right? so like add_settings_field( $id, $title, $callback, $page, $section, $args ); Or is it the ID name?
    – rugbert
    Aug 12, 2013 at 23:49
  • Also - I just tried both and they didnt seem to fire the custom. See my updated question for the code I used
    – rugbert
    Aug 12, 2013 at 23:54

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