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run code in 200+ php & hhvm versions
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<?php class Controller { protected $wrapped = []; public function abc($request) { // did we wrap this yet? if (! isset($this->wrapped['abc'])) { // if not, do it now. this will only happen once (unless you clear it out). $this->wrapped['abc'] = $this->wrap( function ($request) { return "abc\n"; } ); } // invoke and return. return $this->wrapped['abc']($request); } protected function wrap(callable $inner_controller) { return function($request) use ($inner_controller) { // stuff $response = $inner_controller($request); // stuff return $response; }; } } $ctrl = new Controller(); echo $ctrl->abc('the request');
Output for 5.6.0 - 7.2.6
abc