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<?php function decorate(callable $fn, callable $decorator) { $wrapper = $decorator($fn); return function() use ($wrapper) { $returnValue = $wrapper(); return $returnValue; }; } function foo($bar) { throw new Exception("Error $bar!"); } function catch_all_exceptions(callable $fn) { return function() use ($fn) { try { return call_user_func_array($fn, func_get_args()); } catch (\Exception $e) { echo "catch_all_exceptions: Caught Exception: $e\n"; } }; } function once(callable $fn) { return function() use ($fn) { static $return; static $called = false; if (!$called) { $return = call_user_func_array($fn, func_get_args()); $called = true; } return $return; }; } function do_something_before(callable $fn) { return function() use ($fn) { echo "Before!\n"; call_user_func_array($fn, func_get_args()); }; } $bar = decorate(function() { echo "Hello\n"; }, "once"); $bar(); $bar(); $foo = decorate(decorate("foo", "catch_all_exceptions"), "do_something_before"); var_dump($foo("bar"));
Output for 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
Hello Before! Fatal error: Uncaught ArgumentCountError: Too few arguments to function foo(), 0 passed in /in/tIGFu on line 22 and exactly 1 expected in /in/tIGFu:13 Stack trace: #0 /in/tIGFu(22): foo() #1 /in/tIGFu(8): {closure}() #2 /in/tIGFu(47): {closure}() #3 /in/tIGFu(8): {closure}() #4 /in/tIGFu(56): {closure}('bar') #5 {main} thrown in /in/tIGFu on line 13
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Hello Before! Warning: Missing argument 1 for foo(), called in /in/tIGFu on line 22 and defined in /in/tIGFu on line 13 Notice: Undefined variable: bar in /in/tIGFu on line 15 catch_all_exceptions: Caught Exception: Exception: Error ! in /in/tIGFu:15 Stack trace: #0 /in/tIGFu(22): foo() #1 /in/tIGFu(8): {closure}() #2 /in/tIGFu(47): {closure}() #3 /in/tIGFu(8): {closure}() #4 /in/tIGFu(56): {closure}('bar') #5 {main} NULL
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Hello Before! Warning: Missing argument 1 for foo() in /in/tIGFu on line 13 Notice: Undefined variable: bar in /in/tIGFu on line 15 catch_all_exceptions: Caught Exception: exception 'Exception' with message 'Error !' in /in/tIGFu:15 Stack trace: #0 [internal function]: foo() #1 /in/tIGFu(22): call_user_func_array('foo', Array) #2 /in/tIGFu(8): {closure}() #3 [internal function]: {closure}() #4 /in/tIGFu(47): call_user_func_array(Object(Closure), Array) #5 /in/tIGFu(8): {closure}() #6 /in/tIGFu(56): {closure}('bar') #7 {main} NULL
Output for 5.3.0 - 5.3.29
Catchable fatal error: Argument 1 passed to decorate() must be an instance of callable, instance of Closure given, called in /in/tIGFu on line 51 and defined in /in/tIGFu 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/tIGFu 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/tIGFu 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/tIGFu 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/tIGFu on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/tIGFu on line 3
Process exited with code 255.
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