regex - How can I get at the matches when using preg_replace in PHP?

Question

I am trying to grab the capital letters of a couple of words and wrap them in span tags. I am using preg_replace for extract and wrapping purposes, but it's not outputting anything.

preg_replace("/[A-Z]/", "<span class="initial">$1</span>", $str)

Answer 1

You need to put the pattern in parentheses /([A-Z])/, like this:

preg_replace("/([A-Z])/", "<span class="initial">$1</span>", $str)