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<?php trait ImmutableFromParams { private $mutable = true; private function __construct(array $params) { foreach ($params as $key => $value) { $this->{'set' . str_replace(' ', '', ucwords(str_replace('_', ' ', $key)))}($value); } unset($this->mutable); } public static function fromParams(array $params) { return new static($params); } public function __call($method, $args) { if (isset($this->mutable) && substr($method, 0, 3) == 'set' && property_exists($this, lcfirst(substr($method, 3)))) { $this->{lcfirst(substr($method, 3))} = reset($args); } } } interface DataTransferObjectInterface { public static function fromParams(array $params); public function asArray(); } abstract class AbstractDataTransferObject implements DataTransferObjectInterface { use ImmutableFromParams; public function asArray() { return get_object_vars($this); } } final class MyDataTransferObject extends AbstractDataTransferObject { protected $foo; protected $bar; protected function setBar($value) { $this->bar = $value; } } $foo = MyDataTransferObject::fromParams(array('foo' => 'foo', 'bar' => 'bar', 'meh' => 'meh')); $foo->setFoo('newfoo'); $foo->setDog('dog'); var_dump($foo->asArray()); interface ValueObjectInterface { public static function fromParams(array $params); public function __toString(); } abstract class AbstractValueObject implements ValueObjectInterface { use ImmutableFromParams; abstract public function __toString(); } final class MyValueObject extends AbstractValueObject { protected $bar; protected function setBar($value) { $this->bar = $value; } public function __toString() { return string($bar); } } $foo = MyValueObject::fromParams(array('foo' => 'foo', 'bar' => 'bar', 'meh' => 'meh')); $foo->setFoo('newfoo'); $foo->setDog('dog'); echo $foo;
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["foo"]=> string(3) "foo" ["bar"]=> string(3) "bar" } Fatal error: Uncaught Error: Call to undefined function string() in /in/K2s1v:91 Stack trace: #0 /in/K2s1v(100): MyValueObject->__toString() #1 {main} thrown in /in/K2s1v on line 91
Process exited with code 255.

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