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<?php trait Immutable { final public function __construct() { //DO shit var_dump("In trait constructor"); } public function __set($name, $value) { throw new Exception("can't touch this, nah nah nuh nahhh"); } public function __get($name) { return $this->$name; } } class ImmutableThingy { use Immutable; protected $foo = 'bar'; public function __construct() { var_dump("In class constructor"); // What the fuck ever broh } } $thing = new ImmutableThingy; var_dump($thing, $thing->foo); $thing->foo = 'baz'; var_dump($thing, $thing->foo);
Output for git.master, git.master_jit, rfc.property-hooks
string(20) "In class constructor" object(ImmutableThingy)#1 (1) { ["foo":protected]=> string(3) "bar" } string(3) "bar" Fatal error: Uncaught Exception: can't touch this, nah nah nuh nahhh in /in/HHLvO:11 Stack trace: #0 /in/HHLvO(35): ImmutableThingy->__set('foo', 'baz') #1 {main} thrown in /in/HHLvO on line 11
Process exited with code 255.

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