使用jquery post创建模块时，Drupal 7全局$ user的范围

I am creating a module to populate the body of a drupal 7 page of mine.

I have 3 files I am working with.

1. league_settings.module
2. league_settings.js
3. league_settings.php

league_settings.module is as follows.

function league_settings_block_view($delta = '') {
    drupal_add_js(drupal_get_path('module', 'league_settings') .'/js/jquery.js');
    drupal_add_js(drupal_get_path('module', 'league_settings') .'/js/json2.js');
    drupal_add_js(drupal_get_path('module', 'league_settings') .'/js/livequery.js');
    drupal_add_js(drupal_get_path('module', 'league_settings') .'/js/leagueSettings.js');

    $block = array(
      'subject' => t('Enabled Modules'),
      'content' => 'this text works',
     );
       return $block;
    }

league_settings.js is simply

$.post('/modules/leage_settings/php/leagueSettings.php', 
    function(data){
    alert(data);
});

league_settings.php is

global $user;
$name = $user->name;
echo $name;

This will alert a black text box. if I echo 'test' it will work properly.

At the moment I am unable to query without getting a error 500 on my post. I have tried throwing global $user in a function to no avail. Is creating a module like this the best way to set up a php/js file to query my drupal database and edit my page html?