php - How to Regex-replace multiple <br /> tags with one <br /> tag?

Question

I want <br /><br /> to turn into <br />

What's the pattern for this with regex?

Note: The <br /> tags can occur more than 2 times in a row.

Answer 1

$html = preg_replace('#(<br */?>s*)+#i', '<br />', $html);

This will catch any combination of <br>, <br/>, or <br /> with any amount or type of whitespace between them and replace them with a single <br />.