php - PHP如何在对象中找到正确的属性

Question

class a {
    public $a = "3";
    public $b = "0";
    public $b = "3";
    public $c = "0";
    public $d = "0";
    public $e = "0";
    public $g = "0";
}

如何找出哪些属性大于零？

Answer 1

将此方法放在您的类中，它将返回数组中的所有变量：

public function test() {
    $vars = get_object_vars($this);
    $r = array();
    foreach($vars as $k => $v) {
        if($v > 0){ $r[$k] = $v; }
    }
    return $r;
}

Answer 2

您可以get_class_vars像这样在对象本身之外使用该函数：

$a = new a();

$class_vars = get_class_vars(get_class($a));

foreach ($class_vars as $name => $value) {
    if ($value > 0) {
         echo "$name : $value\n";
    }
}