How to individually set WP_DEBUG on a sub-directory multisite?
You can do this by adding some code to wp-config.php $request_uri = $_SERVER[‘REQUEST_URI’]; $debug_dirs = array (‘/debug-dir1/’,’/debug-dir2/’); // list of directories to turn on debugging foreach ($debug_dirs as $debug_dir) { if (!strncmp($request_uri,$debug_dir,strlen($debug_dir))) { define(‘WP_DEBUG’, true); } } define(‘WP_DEBUG’, false); // debug off by default