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<?php $person = new class($controller) { public $age = 15, $height = 72, $weight = 200; public function __set($name, $value) { if (!property_exists($this, $name)) { throw new Exception("No such property: $name"); } $this->{$name} = $value; } public function __get($name) { if (!property_exists($this, $name)) { throw new Exception("No such property: $name"); } return $this->{$name}; } }; var_dump($person); var_dump($person->age); $person->age = 19; var_dump($person->age); try { var_dump($person->badProp); } catch (Exception $e) { var_dump($person); } try { $person->badProp = 5; } catch (Exception $e) { var_dump($person); }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $controller in /in/USatZ on line 3 object(class@anonymous)#1 (3) { ["age"]=> int(15) ["height"]=> int(72) ["weight"]=> int(200) } int(15) int(19) object(class@anonymous)#1 (3) { ["age"]=> int(19) ["height"]=> int(72) ["weight"]=> int(200) } object(class@anonymous)#1 (3) { ["age"]=> int(19) ["height"]=> int(72) ["weight"]=> int(200) }

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