removing new lines except in

Question

I want to remove new lines from some html (with php) except in

 tags where whitespace is obviously important.

             


        

Answer 1

If the html is well formed, you can rely on the fact that

 tags aren't allowed to be nested. Make two passes: First you split the input into block of pre tags and everything else. You can use a regular expression for this task. Then you strip new lines from each non-pre block, and finally join them all back together.


Note that most html isn't well formed, so this approach may have some limits to where you can use it.