Move $base_path definition to core.php to fix CLI script error

core.php

@@ -15,7 +15,8 @@
 ## limitations under the License.
 ##
 
-chdir(dirname(__FILE__));
+$base_path = dirname(__FILE__);
+chdir($base_path);
 mb_internal_encoding('UTF-8');
 date_default_timezone_set('UTC');
 set_error_handler('exception_error_handler');

requesthandler.php

@@ -27,7 +27,6 @@ if(isset($_SERVER['PHP_AUTH_USER'])) {
 }
 
 // Work out where we are on the server
-$base_path = dirname(__FILE__);
 $base_url = dirname($_SERVER['SCRIPT_NAME']);
 $request_url = $_SERVER['REQUEST_URI'];
 $relative_request_url = preg_replace('/^'.preg_quote($base_url, '/').'/', '/', $request_url);