Check with a regular expression that in html all tags have a link and is it absolute?

Question

Regular Expressions

How to use regular expressions to check that all tags in html have a link and it is absolute?

<img src="/gallery/2020/6/4/14tn.jpg" >
<img/>
<img src="" >
<img src="https://site.com//gallery/2020/6/4/14tn.jpg" >
<a src='/gallery/2020/6/4/14tn.jpg' >

Answer 1

Is it a task? Or do you see it that way?
I would select all elements and check them for http start

Answer 2

For example, like this:</?.*http.*/?>