Online PHP editor | refs for lrk7A

<?php function decorate(callable $fn, callable $decorator) { $wrapper = $decorator($fn); return function() use ($wrapper) { return call_user_func_array($wrapper, func_get_args()); }; } 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"; return call_user_func_array($fn, func_get_args()); }; } $bar = decorate(function() { echo "Hello\n"; }, "once"); $bar(); $bar(); $bar(); $foo = decorate(decorate("foo", "catch_all_exceptions"), "do_something_before"); var_dump($foo("bar"));