--TEST-- The variable $php_errormsg shouldn't be optimized as it may be unpredictably modified --INI-- track_errors=1 --FILE-- <?php function test() { $php_errormsg = 1; echo $undef; var_dump($php_errormsg + 1); } test(); ?> --EXPECTF-- Deprecated: Directive 'track_errors' is deprecated in Unknown on line 0 Notice: Undefined variable: undef in %s on line %d Warning: A non-numeric value encountered in %s on line %d int(1)