PEAR is the PHP Extension and Application Repository. It’s basically an add-on to PHP that has a bunch of frameworks that are available. You can read more about it at the official site. Getting PEAR onto my system was not obvious. I came across two articles that helped quite a bit:
Although I had WampServer running, there was no trace of PEAR to be found. I figured out that there was a bug report in for the missing PEAR file. As a result, I downloaded the PEAR file from the official site, copied it into my WampServer installation to get going. From there, the referenced articles above walked me through the rest – including adding to the system EVs.