Can I use a hash sign (#) for commenting in PHP?

Question

I have never, ever, seen a PHP file using hashes (#) for commenting. But today I realized that I actually can! I\'m assuming there\'s a reason why everybody uses

Answer 1

Is there any reason, aside from personal preference, to use // rather than # for comments?

I think it is just a personal preference only. There is no difference between // and #. I personally use # for one-line comment, // for commenting out code and /** */ for block comment.