Ticket #12754: example-plugin.php

<?php
// Plugin Name: Example

function example_install() {
        add_option('example_option_a', 'foo');
        add_option('example_option_b', 'bar');
}
register_activation_hook(__FILE__, 'example_install');

function example_uninstall_a() {
        delete_option('example_option_a');
}
register_uninstall_hook(__FILE__, 'example_uninstall_a');

function example_uninstall_b() {
        delete_option('example_option_b');
}
register_uninstall_hook(__FILE__, 'example_uninstall_b');