As a PHP developer thinking of making Perl a secondary strong suit, what do I need to know? -

I consider myself very fluent in PHP and with that I am familiar with all the important aspects and uses, as well as Its Powers Keeping this in mind, I think the big problem in taking Pearl is going to be with syntax. From this side (a small handicap, in fact, because I've been sold on the fact that Pearl's readable), what are some important differences that I think should be aware of myself before taking the language?