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---
title: Traversing the DOM tree
---
If you are not so familiar with HTML DOM, check this [link](http://php.net/manual/en/book.dom.php) to learn more...
```php
// Example
echo $html->find("#div1", 0)->children(1)->children(1)->children(2)->id;
// or
echo $html->getElementById("div1")->childNodes(1)->childNodes(1)->childNodes(2)->getAttribute('id');
```
You can also call methods using the **Camel naming conventions**.
Method | Description
------ | -----------
`$e->children( [int $index] ) : mixed` | Returns the Nth **child object** if **index** is set, otherwise return an **array of children**.
`$e->parent() : element` | Returns the **parent** of element.
`$e->first_child() : element` | Returns the **first child** of element, or **null** if not found.
`$e->last_child() : element` | Returns the **last child** of element, or **null** if not found.
`$e->next_sibling() : element` | Returns the **next sibling** of element, or **null** if not found.
`$e->prev_sibling() : element` | Returns the **previous sibling** of element, or **null** if not found.
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