PHP : config file

config.php

<?php

	/**
	 * @author		<Chris Moore> 
	 *        	Config file sets all global options
	 *        	And Loads all Dependencies
	 * */

	/**
	*	@param environment = prod, dev , etc. ..
	* */
	$global_config['version'] = 3.1;

	/**
	*	@param environment = prod, dev , etc. ..
	* */
	$global_config['environment'] = 'osx';

	/**
	*	@param include_path relative to root
	* */
	$global_config['include_path'] = 'inc/';

	/**
	*	@param include_path relative to root`
	* */
	$global_config['base_url'] = 'cam.adserve.local';

	/**
	*	Setup Constants
	* */

		/**
		*	DEBUG logs errors throughout the system if set to true
		* */
		if($global_config['environment'] === 'osx'){
			define('DEBUG','VERBOSE'); // ERRORS

			define('USERNAME','root');
    		define('PASSWORD','root');

		define('USERNAME2','root');
		    define('PASSWORD2','root');

		    //*----------------------------------DEBUG ----------------------------------------*/
			error_reporting(E_ALL);
			ini_set("display_errors", 1);
			//*----------------------------------DEBUG ----------------------------------------*/
		}else{
			//*----------------------------------DEBUG ----------------------------------------*/
			error_reporting(0);
			ini_set("display_errors", 0);
			//*----------------------------------DEBUG ----------------------------------------*/
			define('DEBUG',FALSE);

			define('USERNAME','root');
		    define('PASSWORD','root');

		    define('USERNAME2','root');
		    define('PASSWORD2','root');
		}

		define('HOST', 'localhost');
		// Set Memcache Expiration
		define('MEMCACHE_EXPIRE', 30);	// units are seconds. '0' means never expires.

		define('APP_PATH', $_SERVER['DOCUMENT_ROOT']);
		define('INC_PATH', APP_PATH . '/' . $global_config['include_path'] );

		if(DEBUG === 'VERBOSE'){
			//*----------------------------------DEBUG ----------------------------------------*/
				error_reporting(E_ALL);
				ini_set("display_errors", 1);
			//*----------------------------------DEBUG ----------------------------------------*/
		}

		$config['version'] = $global_config['version'];
		$config['environment'] = $global_config['environment'];
		$config['base_url'] = $global_config['base_url'];
		$config['debug'] = DEBUG;
		$config['usersname'] = USERNAME;
		$config['password'] = PASSWORD;
		$config['usersname2'] = USERNAME2;
		$config['password2'] = PASSWORD2;
		$config['host'] = HOST;
		$config['app_path'] = APP_PATH;
		$config['inc_path'] = INC_PATH;
		$config['memcache_expire'] = MEMCACHE_EXPIRE;

		require_once('class_db.
		require_once('ChromePhp.php');
		require_once('base.class.php');
		require_once('class_serve.php');
		require_once('class_module.php');
		// require_once('class_memcache.php');
		require_once('wrapper.class.php');

		Base::log('Config Loaded Successfully: ' . __FILE__ . ' - Line: '. __LINE__, 'log' );
		Base::log($config, 'log' );