--TEST-- Bug #25547 (error_handler and array index with function call) --FILE-- <?php function handler($errno, $errstr, $errfile, $errline, $context) { echo __FUNCTION__ . "($errstr)\n"; } set_error_handler('handler'); function foo($x) { return "foo"; } $output = array(); ++$output[foo("bar")]; print_r($output); echo "Done"; ?> --EXPECT-- handler(Undefined index: foo) Array ( [foo] => 1 ) Done