Question

So something like this

<h2 style='margin-top: 10px;'>
<?php echo $title; ?>
</h2>

should become

<h1 style='margin-top: 10px;'>
<?php echo $title; ?>
</h1>

---

I use this code perl -pi -e 's/<h2(.*)<\/h2>/<h1\1<\/h1>/g' * but it works only if tags are in one line.

Answer 1

There is no need to pair up the opening and closing tags. Simply change all opening <h2> tags to ‘` and then do the same for all closing tags. Like this

perl -pie 's|<h2\b|<h1|g; s|</h2\b|</h1|g;' *