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<?php abstract class almostSingleton { final protected function __construct() { echo 'Built ' . get_class($this) . PHP_EOL; } } class GoodTwin extends almostSingleton { } class EvilTwin extends almostSingleton { public static function static_getGoodTwin() { return new GoodTwin(); } public function getGoodTwin() { return new GoodTwin(); } } $gotcha = EvilTwin::static_getGoodTwin(); $et = new EvilTwin(); $nope = $et->getGoodTwin();
Output for git.master, git.master_jit, rfc.property-hooks
Built GoodTwin Fatal error: Uncaught Error: Call to protected almostSingleton::__construct() from global scope in /in/glRkc:22 Stack trace: #0 {main} thrown in /in/glRkc on line 22
Process exited with code 255.

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