Question

A user will supply HTML, it may be valid or invalid (malformed). I need to be able to determine such things as:

1. Is there a style tag in the body
2. Is there a div that has a style attribute that makes use of width or background-image.

I have tried using the DOMDocument class but it can only do 1 and not 2 with xPath.

I have also tried simple_html_dom and that can only do 1 but not 2.

Do you think its a good idea that I just use regular expressions or is there something that I haven’t thought of?

Answer 1

XPath can do both (1) and (2):

To test if there’s a style tag in the body:

//body//style

To test if there’s a div with a style attribute using width or background-image:

//div[contains(@style,'width:') or contains(@style,'background-image:')]

And, as you were curious about in your comments, seeing if a style tag contains a:hover or font-size:

//style[contains(text(),'a:hover') or contains(text(),'font-size:')]