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<?php class MyClass { protected $arr; public function __construct() { $this->arr = array(); } public function getArr() { return $this->arr; } public function append($arr) { $this->arr[] = $arr; } public function merge($arr) { $this->arr = array_merge($this->arr, $arr); } } $arr = array('a','b'); $obj = new MyClass(); $obj->append($arr);//使用append无法修改类属性 var_dump($obj->getArr()); //output : //array(0){} $obj->merge($arr);//使用merge可以 var_dump($obj->getArr()); //output: //array(2){'a','b'}
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } } array(3) { [0]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } [1]=> string(1) "a" [2]=> string(1) "b" }

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