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<?php class Foo { public $foo; public function getFoo() { return $this->foo; } } class Bar extends Foo { public function __construct($foo) { $this->foo = $foo; } } class FooBar { public $test = 'Hello World!'; } $test = new FooBar(); $foo = new Foo($test); $bar = new Bar($test); echo "===\n"; print_r($foo); echo "---\n"; print_r($bar); echo "===\n";
Output for git.master, git.master_jit, rfc.property-hooks
=== Foo Object ( [foo] => ) --- Bar Object ( [foo] => FooBar Object ( [test] => Hello World! ) ) ===

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