Laravel Relation解析一个数组

Question

我无法用正确的逻辑解析多维数组？

我想用它的子句解析我的数组： 例如：

1. 1 parent-＆gt; 1child，
2. 1父母 - > 2孩子等
3. 2父母＆＃39;没有任何孩子＆＃39;

但是在我的代码中，else选项不起作用：

foreach ($this->categories as $s) {
        echo "<hr>";
        echo "<p style='color:red;'>".$s."</p>";
        if ($s->childrenRecursive) {
            foreach ($s->childrenRecursive as $key) {
                echo '<p>'.$s->id.''.$key->id.'</p>';
                echo "it has many children";
            }   
        } else {
            echo $s->id;
            echo "single parent without any child";
        }
    }

此代码的结果：

{"id":13,"image":null,"parent_id":null,"top":0,"column":1,"sort_order":0,"status":1,"deleted_at":null,"created_at":"2017-09-25 12:24:11","updated_at":"2017-09-25 12:24:11","children_recursive":[{"id":15,"image":null,"parent_id":13,"top":0,"column":1,"sort_order":0,"status":1,"deleted_at":null,"created_at":"2017-09-25 12:26:09","updated_at":"2017-09-25 12:26:09","children_recursive":[]},{"id":16,"image":null,"parent_id":13,"top":0,"column":1,"sort_order":0,"status":1,"deleted_at":null,"created_at":"2017-09-25 12:36:43","updated_at":"2017-09-25 12:36:43","children_recursive":[]}]}

1315

它有很多孩子 1316

它有很多孩子

[![{"id":14,"image":null,"parent_id":null,"top":0,"column":1,"sort_order":0,"status":1,"deleted_at":null,"created_at":"2017-09-25 12:25:04","updated_at":"2017-09-25 12:25:04","children_recursive":\[\]}][1]][1]