A simple (ugly) test plugin admin screen for Wordpress

test-plugin.php

<?php
/*
Plugin Name: TestPlugin
*/

function test_plugin_menu(){
    add_options_page('TestPlugin Settings', 'TestPlugin', 'manage_options', 'test-plugin-menu', 'test_plugin_options');
}

add_action('admin_menu','test_plugin_menu');

function test_plugin_options(){
    // include('admin/super-plugin-admin.php');
    $confirm = $_POST['tp_confirm'];
    if( $confirm == 'DOIT!' ){
        echo "Okay, run it... <br/>";
        $output = shell_exec('echo HI!'); 
        echo "<pre>$output</pre><hr/>";
    }   
    ?>  
        <form name="form1" method="post" action="">

        <p>This plugin will promote your staging changes into production. You must enter "DOIT!" in the following textbox to confirm you want to do so.</p>
        <p><input type="text" name="tp_confirm" size="20">
        </p><hr />

        <p class="submit">
        <input type="submit" name="Submit" class="button-primary" value="Get er done" />
        </p>

        </form>
    <?php
}