Regular Expression to capture the last </p> tag and replace it with some text

I want to capture the final

 /(</p>)$/

Is this going to cause any problems in a typical html script that looks like this:

<p>Copyright 2010 &copy;</p>
<p>Sanscode开发者_JAVA技巧</p>

It seems to work fine, but since i'm new to regex I was wondering if anyone had any caveats or things for me to note. I am using preg_replace().

Thanks

It would not match, if there are whitespace characters behind the last angel bracket.