和array_diff（）不无明显原因

Question

我试图diff的两个数组和PHP还是返回了以下错误：

Catchable fatal error: Object of class Node could not be converted to string in D:\projetos\labs\dok\dev\application\models\dok.php on line 410 

我阵列分别是：

array(2) 
    object(Node)#5 ...[7 attributes] 
    object(Node)#6 ...[7 attributes] 

array(1) 
    object(Node)#5 ....[7 attributes] 

我真的欣赏一些帮助，因为我不知道发生了什么。谢谢（：

---

的要求，围绕DIFF代码：

// is it a distant child? 
$all_childs = $node->get_childs(true); 
$distant_childs = array_diff($all_childs, $childs); 
if(in_array($this, $distant_childs)) 
    return 'distant-child'; 

Answer 1

Note:

Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.

如果元素是对象，你需要为对象提供__toString()方法，或者您做到了