First Time Post and Question

Greets all, first time poster and n00b to PHP, so bear with me please.

Here's my code:
<?php require_once("pxweather.class.php"); $w = new Weather(); $w->load(); echo $w->getCurrent("skies"); ?>

I would like the text displayed by the echo to be used in an if statement. How do I call in this text in the statement? Any help would be appreciated.

Link to pxweather.class.php