3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function decorate(callable $fn, callable $decorator) { $wrapper = $decorator(); return function() use ($fn, $wrapper) { $gen = $wrapper(); // Only call the wrapped function if the decorator made "yield" if (!$gen instanceof \Generator) { return $gen; } // Use the yielded arguments, forward all if none given. if (is_array($gen->current())) { $arguments = $gen->current(); } else { $arguments = func_get_args(); } // Forward all throwed Exceptions try { // Send the decorated function's return value into the // decorator as return value of "yield" $gen->send(call_user_func_array($fn, $arguments)); } catch (\Exception $e) { $gen->throw($e); } }; } function foo($bar) { throw new Exception("Error $bar!"); } function catch_all_exceptions() { return function() { try { (yield); } catch (\Exception $e) { echo "catch_all_exceptions: Caught Exception: $e\n"; } }; } function do_something_before() { return function() { echo "Before!\n"; return "foo"; }; } $foo = decorate(decorate("foo", "catch_all_exceptions"), "do_something_before"); var_dump($foo("bar"));
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Before! string(3) "foo"
Output for 5.3.0 - 5.3.29
Catchable fatal error: Argument 1 passed to decorate() must be an instance of callable, string given, called in /in/ljD6r on line 57 and defined in /in/ljD6r on line 3
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/ljD6r on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/ljD6r on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/ljD6r on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/ljD6r on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/ljD6r on line 3
Process exited with code 255.