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<?php function decorate(callable $fn, callable $decorator) { return function() use ($fn, $decorator) { $d = $decorator(); $gen = $d(); // Only call the wrapped function if the decorator made "yield" if (!$gen instanceof \Generator) { return; } if (is_array($gen->current())) { $arguments = $gen->current(); } else { $arguments = func_get_args(); } // Forward all throwed Exceptions try { $gen->send(call_user_func_array($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 "Caught Exception: $e\n"; } }; } function do_something_before() { return function() { echo "Before!\n"; yield; }; } $foo = decorate(decorate("foo", "catch_all_exceptions"), "do_something_before"); $foo("bar");
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Before! Caught Exception: Exception: Error bar! in /in/VOchO:31 Stack trace: #0 /in/VOchO(22): foo('bar') #1 /in/VOchO(22): {closure}('bar') #2 /in/VOchO(54): {closure}('bar') #3 {main}
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Before! Caught Exception: exception 'Exception' with message 'Error bar!' in /in/VOchO:31 Stack trace: #0 [internal function]: foo('bar') #1 /in/VOchO(22): call_user_func_array('foo', Array) #2 [internal function]: {closure}('bar') #3 /in/VOchO(22): call_user_func_array(Object(Closure), Array) #4 /in/VOchO(54): {closure}('bar') #5 {main}
Output for 5.4.0 - 5.4.45
Before! Notice: Use of undefined constant yield - assumed 'yield' in /in/VOchO on line 49
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/VOchO on line 53 and defined in /in/VOchO on line 3
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/VOchO on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/VOchO on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/VOchO on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/VOchO on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/VOchO on line 3
Process exited with code 255.
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