PHP "require_once" says it can't find a file in the directory
<p>I'm debugging some PHP code written by an outsourcing company (I'm not a PHP guy at all but know the basics; we have an offshore team of PHP developers working for us on this project) that's not working; the code is supposed to be called every 30 minutes by a cron job but its not firing.  I tried to run the PHP script via the command line to test if it's working, but it's giving me the following (anonymized) errror:</p>

<p><code>PHP Fatal error:  require_once(): Failed opening required '/myapp/_lib/_classes/MySql.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/myapp/_lib/_base/common.inc.php on line 6</code></p>

<p>However, the file <code>/var/www/html/myapp/_lib/_classes/MySql.php</code> exists under the proper directory.  I'm missing something simple, I'm sure, but like I said I know really nothing beyond the bare basics of PHP and I really need to get this service up and running.</p>

<p><strong>EDIT:</strong> The code is using the <code>__autoload()</code> function with all classes in <code>/_lib/_classes</code></p>
