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run code in 300+ PHP versions simultaneously
<?php class A { public $b; public function __construct($b) { $this->b = $b; } public function methodA() { return $this->b; } } class ProxyA extends A { private $proxied; public function methodA() { return $this->proxied->methodA(); } public function methodB() { return true; } public static function makeProxy(A $instance) { $rc = new \ReflectionClass(get_class($instance)); $proxy = $rc->newInstanceWithoutConstructor(); $proxy->proxied = $instance; return $proxy; } } var_dump(ProxyA::makeProxy(new A(1234))->methodB());

preferences:
49.36 ms | 402 KiB | 5 Q