<?php
trait Immutable {
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';
}
$thing = new ImmutableThingy;
var_dump($thing, $thing->foo);
$thing->foo = 'baz';
var_dump($thing, $thing->foo);
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/NO5s6:5
Stack trace:
#0 /in/NO5s6(23): ImmutableThingy->__set('foo', 'baz')
#1 {main}
thrown in /in/NO5s6 on line 5
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
object(ImmutableThingy)#1 (1) {
["foo":protected]=>
string(3) "bar"
}
string(3) "bar"
Fatal error: Uncaught exception 'Exception' with message 'can't touch this, nah nah nuh nahhh' in /in/NO5s6:5
Stack trace:
#0 /in/NO5s6(23): ImmutableThingy->__set('foo', 'baz')
#1 {main}
thrown in /in/NO5s6 on line 5
Process exited with code 255.