Print_r to find allowable values for a method?
<p>I stumbled across this page which talks about the very handy new reflection class that ships with PHP5 and returns all the methods and properties of a class:</p>

<p><a href="http://stackoverflow.com/questions/1290117/print-r-to-get-object-methods-in-php">http://stackoverflow.com/questions/1290117/print-r-to-get-object-methods-in-php</a></p>

<p>Following on from this, is there any way to determine the allowable values for the methods it returns?</p>
