php - array_diff() 无明显原因失败

Question

我试图比较两个数组，php 返回以下错误:

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

我的数组分别是:

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

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

我真的很感谢这里的一些帮助，因为我不知道发生了什么。谢谢(:

---

根据要求，差异周围的代码:

// 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，则需要提供__toString()对象的方法，或者您自己完成。