PHP strpos and strlen

Question

I'm trying to get words before and after a string in a $body thats taken from a mysql entry. I'm able to find the keyword in the body, get its strpos and its strlen. From there I believe I should be able to tell it to print X characters (or ideally words) before and after that but I can't seem to find anything on google telling me HOW. Is there a PHP function that tells it to start at $strpos and then somehow use the strlen and print before and after that?

Hope that wasn't too unclear, any help is appreciated - thanks. I got the original strpos and strlen idea from Amandas answer here: Return words before and after the first occurrence of a string

But I don't understand how to apply that.

Answer 1

substr()