Why should I choose Perl over PHP?

A friend of mine, who loves PHP, often tries to convince me to write Web apps in PHP. He knows I am a Perl lover, and I just say: "PHP doesn't like me". But next time he tries it hard, I'd like to put him in troubles with a detailed and specific list of features or issues about Perl-vs-PHP topic.

I think experienced programmers appreciate the huge list of features and options available with Perl.

I want to write a list of PHP problems to argue convincingly with my friend.

Could you help me with your opinions?

Why PHP is not my favourite language?

Because I'm not a web application developer; I'm an enterprise application developer, who sometimes writes Web apps. So I use Perl.

What are your reasons?