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--TEST-- ReflectionClass::newInstance() --CREDITS-- Robin Fernandes <robinf@php.net> Steve Seear <stevseea@php.net> --FILE-- <?php class A { public function A() { echo "In constructor of class A\n"; } } class B { public function __construct($a, $b) { echo "In constructor of class B with args $a, $b\n"; } } class C { protected function __construct() { echo "In constructor of class C\n"; } } class D { private function __construct() { echo "In constructor of class D\n"; } } class E { } $rcA = new ReflectionClass('A'); $rcB = new ReflectionClass('B'); $rcC = new ReflectionClass('C'); $rcD = new ReflectionClass('D'); $rcE = new ReflectionClass('E'); $a1 = $rcA->newInstance(); $a2 = $rcA->newInstance('x'); var_dump($a1, $a2); $b1 = $rcB->newInstance(); $b2 = $rcB->newInstance('x', 123); var_dump($b1, $b2); try { $rcC->newInstance(); echo "you should not see this\n"; } catch (Exception $e) { echo $e->getMessage() . "\n"; } try { $rcD->newInstance(); echo "you should not see this\n"; } catch (Exception $e) { echo $e->getMessage() . "\n"; } $e1 = $rcE->newInstance(); var_dump($e1); try { $e2 = $rcE->newInstance('x'); echo "you should not see this\n"; } catch (Exception $e) { echo $e->getMessage() . "\n"; } ?> --EXPECTF-- In constructor of class A In constructor of class A object(A)#%d (0) { } object(A)#%d (0) { } Warning: Missing argument 1 for B::__construct() in %s on line 9 Warning: Missing argument 2 for B::__construct() in %s on line 9 Notice: Undefined variable: a in %s on line 10 Notice: Undefined variable: b in %s on line 10 In constructor of class B with args , In constructor of class B with args x, 123 object(B)#%d (0) { } object(B)#%d (0) { } Access to non-public constructor of class C Access to non-public constructor of class D object(E)#%d (0) { } Class E does not have a constructor, so you cannot pass any constructor arguments