--TEST-- Scalar type - default via constants - error condition --FILE-- <?php const STRING_VAL = "test"; function int_val(int $a = STRING_VAL): int { return $a; } var_dump(int_val()); ?> --EXPECTF-- Fatal error: Uncaught TypeError: Argument 1 passed to int_val() must be of the type integer, string given, called in %s on line %d and defined in %s:%d Stack trace: #0 %s(%d): int_val() #1 {main} thrown in %s on line %d