Question

In the WordPress Settings API, creating a new options page usually starts out with

register_setting('sample_options', 'my_option');
add_settings_section('section', 'Sample Options', 'callback1', 'page');
add_settings_field('name', 'Label', 'callback2', 'page', 'section');

In this simplified example, the data gets saved in the option my_option making the value of name accessible through

$option = get_option('my_option');
$name = $option['name']; // Got it

But what if the value of the name field is there not to place a new value but to update an already existing option that’s not my_option like for example this_other_option? I guess what I’m really looking for is is it possible for one field to save to multiple options (my_option and this_other_option) while using the Settings API?

Answer 1

I suppose you could use a callback in register_setting. It would look something like the following:

<?php
register_setting('sample_options', 'my_option', 'my_sanitize_callback');

function my_sanitize_callback($value, $option) {
    $value = mysql_real_escape_string($value);
    update_option('my_other_option', $value);
    return $value;
}
?>

You may have to tweak that a bit. I haven’t tested it.