Regular Expression in php, extracting string between tags and replace it

Question

I have the following HTML and what I want is to extract the string between two tags and replace another string with the one that was extracted. Here is an example:

<p>|something=to remember:yes: no</p>
<p><A:keyword term="to remember, yes no" /></p>

I have built something like this but I do not know whether regular expressions really help me here?

<[p]\>(.*)<\/p>

Answer 1

Thanks for your help. I solved my problem by using

something==([A-Za-z]*)\s([A-Za-z]*),\s([A-Za-z]*)\s([A-Za-z]*)

as a static input and then everything after it was treated with regex and grouping. With that solution I did solve my problem.