如何将HTML“selected”选项与preg_match匹配[复制]

Question

This question already has an answer here:

• RegEx match open tags except XHTML self-contained tags 34 answers

Browsers consider an <option> selected by default if it has the selected="selected" attributes. But this somehow works even if that attribute value is omitted.

So

<option selected="selected" value="1">value text</option>

and this works

<option selected value="1">value text</option>

My question is how to write a Regex pattern that matches both conditions above, but never matches something like

<option value="the devil with **selected** ">value text</option>

EDIT: I forgot to mention that some conditions are still considered valid XHTML, like selected='selected', or selected=selected or even selected=SelEctEd

</div>

Answer 1

After discussions here, and some other resources like "RegEx match open tags except XHTML self-contained tags" I realized it's impractical to use Regular expressions to accurately parse XHTML.