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<?php final class Immutable { private $somePropertyThatShouldntBeChanged; public static function create($value) { return new self($value); } private function __construct($value) { $this->somePropertyThatShouldntBeChanged = $value; } public function getValue() { return $this->somePropertyThatShouldntBeChanged; } } $foo = Immutable::create('immutable value'); echo $foo->getValue() . PHP_EOL; $foo->__construct('not immutable value'); echo $foo->getValue() . PHP_EOL;
Output for git.master, git.master_jit, rfc.property-hooks
immutable value Fatal error: Uncaught Error: Call to private method Immutable::__construct() from global scope in /in/oOuEk:26 Stack trace: #0 {main} thrown in /in/oOuEk on line 26
Process exited with code 255.

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