迭代php類的屬性

Question

如何遍歷 php 類的（公共或私有）屬性？

Answer 1

tl;博士

// iterate public vars of class instance $class
foreach (get_object_vars($class) as $prop_name => $prop_value) {
   echo "$prop_name: $prop_value\n";
}

進一步的例子：

http://php.net/get_object_vars

根據范圍獲取給定對象的可訪問非靜態屬性。

class foo {
    private $a;
    public $b = 1;
    public $c;
    private $d;
    static $e; // statics never returned

    public function test() {
        var_dump(get_object_vars($this)); // private's will show
    }
}

$test = new foo;

var_dump(get_object_vars($test)); // private's won't show

$test->test();

輸出：

array(2) {
  ["b"]=> int(1)
  ["c"]=> NULL
}

array(4) {
  ["a"]=> NULL
  ["b"]=> int(1)
  ["c"]=> NULL
  ["d"]=> NULL
}