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run code in 300+ PHP versions simultaneously
<?php abstract class Base { private $foo; public function setFoo($foo) { $this->foo = $foo; } public function foo() { return $this->foo; } } class Foo extends Base { public function foo() { return ' - '.parent::foo(); } } $obj = new Foo(); $obj->setFoo('yay'); var_dump($obj->foo());

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