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<?php class foo { public $value = []; public function &getValue() { return $this->value; } } $obj = new foo; $myValue = &$obj->getValue(); // $myValue is a reference to $obj->value, which is 42. $myValue[] = 123; var_dump($obj->value);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> int(123) }

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