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<?php declare(strict_types=1); class Foo { public function out(string $msg) { print __CLASS__ . ': ' . $msg . PHP_EOL; } } class Msg { public function __toString() { return "world"; } } class Bar extends Foo { public function out($msg) { print __CLASS__ . ': ' . $msg . PHP_EOL; } } $f = new Foo(); try { $f->out('hello'); } catch (TypeError $e) { print $e->getMessage() . PHP_EOL; } try { $f->out(new Msg()); } catch (TypeError $e) { print $e->getMessage() . PHP_EOL; } $b = new Bar(); try { $b->out('hello'); } catch (TypeError $e) { print $e->getMessage() . PHP_EOL; } try { $b->out(new Msg()); } catch (TypeError $e) { print $e->getMessage() . PHP_EOL; }
Output for git.master, git.master_jit, rfc.property-hooks
Foo: hello Foo::out(): Argument #1 ($msg) must be of type string, Msg given, called in /in/0dpsJ on line 34 Bar: hello Bar: world

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