The ms_file_constants() WordPress PHP function defines multisite file constants for backward compatibility with legacy file-serving.
Usage
ms_file_constants();
Parameters
- No parameters
More information
See WordPress Developer Resources: ms_file_constants()
This function is used for backward compatibility purposes and may be deprecated in the future.
Examples
Define Multisite File Constants
The following code defines multisite file constants for a WordPress multisite installation.
// Define multisite file constants ms_file_constants();
Disable File Serving for Multisite
The code below disables file serving for a multisite installation by not calling the ms_file_constants() function.
// Do not define multisite file constants to disable file serving // ms_file_constants(); // Commented out
Check if Constants are Defined
In this example, we check if the multisite file constants are defined and then define them if they are not.
// Check if multisite file constants are defined
if (!defined('UPLOADBLOGSDIR')) {
ms_file_constants();
}
Define Constants Manually
In the following code, we manually define multisite file constants instead of using the ms_file_constants() function.
// Manually define multisite file constants
define('UPLOADBLOGSDIR', 'wp-content/blogs.dir');
define('BLOGUPLOADDIR', UPLOADBLOGSDIR . '/' . get_current_blog_id() . '/files/');
Define Constants Conditionally
This example defines multisite file constants only if a specific condition is met, such as a certain plugin being active.
// Check if a specific plugin is active
if (is_plugin_active('my-plugin/my-plugin.php')) {
ms_file_constants();
}