I have written a plugin that interfaces with a third-party mailing API. I have created a settings page for my plugin that includes two buttons:

• a submit button created with submit_button() which saves the form
• a “test settings” button that should use the current values from the form without saving them

This is what I currently have:

echo '<form method="post" action="options.php">';
settings_fields('myplugin_settings');
do_settings_sections('myplugin');
echo '<p>';
submit_button('Test Settings', '', 'test', false);
echo ' ';
submit_button(null, 'primary', 'submit', false);
echo '</p></form>';

This produces two buttons, as expected:

However, I don’t know how to override the action for the “test settings” button. Is there a hook for this? I can’t find any documentation for this.