在codeigniter安装之外从外部php脚本访问CodeIgniter超级对象

Question

I have been trying so long but couldn't find a solution. For some reason I need to access the codeigniter super object get_instance() from an external php script which is located outside codeigniter installation.

So for example, I have a custom php script called my_script.php inside public_html. And the codeigniter is installed inside public_html/codeigniter.

Followed by the discussion here: http://ellislab.com/forums/viewthread/101620/ I created a file called external.php and put it inside public_html/codeigniter folder, it contains the following code:

<?php
// Remove the query string
$_SERVER['QUERY_STRING'] = '';
// Include the codeigniter framework
ob_start();
require('./new/index.php');
ob_end_clean();
?>

Then I created a file called my_script.php and put it inside public_html folder (outside codeigniter installation), it contains the following code:

<?php
require('new/external.php');
$ci =& get_instance();
echo $ci->somemodel->somemethod();
?>

Now when I load the my_script.php file from browser, it produces following error:

Your system folder path does not appear to be set correctly. Please open the following file and correct this: index.php

If I put the my_script.php file inside codeigniter folder with corrected file path in require() function then it works. But I really need it to work from outside codeigniter installation.

Any idea how to get rid of this problem?

Thanks in advance.

Answer 1

CI's main index.php sets the paths of the system and application folders. If you are including index.php from another directory, these paths are set relative to your "including" directory.

Try changing the following lines in index.php

$system_path = 'system';
// change to...
$system_path = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'system';

// and...
$application_folder = 'application';
// change to...
$application_folder = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'application';

The dirname(__FILE__) will give you the absolute path of the index.php even if you include it somewhere else.