php - 遍历 php 类的属性

Question

如何遍历 php 类的(公共(public)或私有(private))属性？

Answer 1

tl;dr

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

进一步的例子:

http://php.net/get_object_vars

Gets the accessible non-static properties of the given object according to scope.

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();

输出:

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

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