假设您有一个带有slug“教学门户”的页面，该插件会为该页面添加一个重写规则，允许在URL中的该页面之后添加一个部分，即您所称的“mygetdata”。我把它叫做“教训”。

<?php
/**
 * Plugin Name: Custom PHP app on teaching-portal page
 * Plugin URI: http://wordpress.stackexchange.com/questions/75991
 */

// Flush rewrite rules on plugin activation
register_activation_hook(__FILE__, \'wpse75991_activate\');
function wpse75991_activate()
{
    wpse75991_add_rewrite_rule();
    flush_rewrite_rules();
}

// Flush rewrite rules on plugin deactivation
register_deactivation_hook(__FILE__, \'wpse75991_deactivate\');
function wpse75991_deactivate()
{
    flush_rewrite_rules();
}

// Add a custom rewrite rule for the teaching portal section
add_action(\'init\', \'wpse75991_add_rewrite_rule\');
function wpse75991_add_rewrite_rule()
{
    $pagename = \'teaching-portal\'; // Slug
    add_rewrite_rule(
        $pagename.\'/?([^/]*+)\',
        \'index.php?pagename=\'.$pagename.\'&lesson=$matches[1]\',
        \'top\'
    );
}

// Register the custom query var so WP recognizes it
add_filter(\'query_vars\', \'wpse75991_add_query_var\');
function wpse75991_add_query_var($vars)
{
    $vars[] = \'lesson\';
    return $vars;
}

$lesson = get_query_var(\'lesson\');

if (empty($lesson))
{
    // Show all lessons
}
else
{
    // Show a single lesson
    var_dump($lesson);
}