php - Using DOMDocument, is it possible to get all elements that exists within a certain DOM? -

Assume that I have an HTML file with many different elements, suppose I do not already know that it What the HTML looks like

Using PHP's DOMDocument, how can I recycle and modify the all elements? I see that the elementbet tagname gets and the elementbid is found. I want to iterate through all the elements.

For example suppose that HTML looks like this (just one example, I really do not know the structure):

  $ html = '  
 I want to be able to do some simple DOM modifications (like JavaScript):  
  $ dom = new DOMDocument (); $ Dom- & gt; loadHTML ($ HTML); // The code below clearly does not work, but shows how I want to get the foreach ($ dom-> GetAllElements $ element) {if (! $ Element- & gt; Hexellale ('Potatoes')) {$ element-> AddClass ('potatoes'); } And ($ element-> removeClass ('potato');}} $ Html = $ dom-> Save HTML ();   
 Then in this example, The resultant HTML would look like:  
  $ html = '
   & gt; Lt; / div & gt; ';   
 How can I be repeated through all the elements and amend them while flying in the forech-loop? I actually have regex   
 
 
 You can pass an asterisk  *  with which all elements return:  
  foreach ($ dom-> getElementsByTagName ('*') as $ element) {}   
 From:   Name  
 The tag's local name (non-namespace) special value tag * matches all tags.