index.php

<?php

	define('ENVIRONMENT', isset($_SERVER['CI_ENV']) ? $_SERVER['CI_ENV'] : 'development');

/*
 *---------------------------------------------------------------
 * ERROR REPORTING
 *---------------------------------------------------------------
 *
 * Different environments will require different levels of error reporting.
 * By default development will show errors but testing and live will hide them.
 */
switch (ENVIRONMENT)
{
	case 'development':
		error_reporting(-1);
		ini_set('display_errors', 1);
	break;

	case 'testing':
	case 'production':
		ini_set('display_errors', 0);
		if (version_compare(PHP_VERSION, '5.3', '>='))
		{
			error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED & ~E_STRICT & ~E_USER_NOTICE & ~E_USER_DEPRECATED);
		}
		else
		{
			error_reporting(E_ALL & ~E_NOTICE & ~E_STRICT & ~E_USER_NOTICE);
		}
	break;

	default:
		header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
		echo 'The application environment is not set correctly.';
		exit(1); // EXIT_ERROR
}

/*
 *---------------------------------------------------------------
 * SYSTEM DIRECTORY NAME
 *---------------------------------------------------------------
 *
 * This variable must contain the name of your "system" directory.
 * Set the path if it is not in the same directory as this file.
 */
	$system_path = 'system';
	$application_folder = 'application';
	$view_folder = '';


	// Set the current directory correctly for CLI requests
	if (defined('STDIN'))
	{
		chdir(dirname(__FILE__));
	}

	if (($_temp = realpath($system_path)) !== FALSE)
	{
		$system_path = $_temp.DIRECTORY_SEPARATOR;
	}
	else
	{
		// Ensure there's a trailing slash
		$system_path = strtr(
			rtrim($system_path, '/\\'),
			'/\\',
			DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR
		).DIRECTORY_SEPARATOR;
	}

	// Is the system path correct?
	if ( ! is_dir($system_path))
	{
		header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
		echo 'Your system folder path does not appear to be set correctly. Please open the following file and correct this: '.pathinfo(__FILE__, PATHINFO_BASENAME);
		exit(3); // EXIT_CONFIG
	}

/*
 * -------------------------------------------------------------------
 *  Now that we know the path, set the main path constants
 * -------------------------------------------------------------------
 */
	// The name of THIS file
	define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));

	// Path to the system directory
	define('BASEPATH', $system_path);

	// Path to the front controller (this file) directory
	define('FCPATH', dirname(__FILE__).DIRECTORY_SEPARATOR);

	// Name of the "system" directory
	define('SYSDIR', basename(BASEPATH));

	// The path to the "application" directory
	if (is_dir($application_folder))
	{
		if (($_temp = realpath($application_folder)) !== FALSE)
		{
			$application_folder = $_temp;
		}
		else
		{
			$application_folder = strtr(
				rtrim($application_folder, '/\\'),
				'/\\',
				DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR
			);
		}
	}
	elseif (is_dir(BASEPATH.$application_folder.DIRECTORY_SEPARATOR))
	{
		$application_folder = BASEPATH.strtr(
			trim($application_folder, '/\\'),
			'/\\',
			DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR
		);
	} 
	else
	{
		header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
		echo 'Your application folder path does not appear to be set correctly. Please open the following file and correct this: '.SELF;
		exit(3); // EXIT_CONFIG
	}

	define('APPPATH', $application_folder.DIRECTORY_SEPARATOR);

	// The path to the "views" directory
	if ( ! isset($view_folder[0]) && is_dir(APPPATH.'views'.DIRECTORY_SEPARATOR))
	{
		$view_folder = APPPATH.'views';
	}
	elseif (is_dir($view_folder))
	{
		if (($_temp = realpath($view_folder)) !== FALSE)
		{
			$view_folder = $_temp;
		}
		else
		{
			$view_folder = strtr(
				rtrim($view_folder, '/\\'),
				'/\\',
				DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR
			);
		}
	}
	elseif (is_dir(APPPATH.$view_folder.DIRECTORY_SEPARATOR))
	{
		$view_folder = APPPATH.strtr(
			trim($view_folder, '/\\'),
			'/\\',
			DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR
		);
	}
	else
	{
		header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
		echo 'Your view folder path does not appear to be set correctly. Please open the following file and correct this: '.SELF;
		exit(3); // EXIT_CONFIG
	}
	define('VIEWPATH', $view_folder.DIRECTORY_SEPARATOR);
	define('EXT', '.php');
/*
 * --------------------------------------------------------------------
 * LOAD THE BOOTSTRAP FILE
 * --------------------------------------------------------------------
 *
 * And away we go...
 */
require_once BASEPATH.'core/CodeIgniter.php';