any tips for me to improve my skills in php?

Read around the subject, make sure you understand algorithms, data structures, design patterns, good coding practices, etc. Books on the subject are often the best place to go, in the case of PHP specific stuff the manual is a godsend, incredibly useful. It's a great reference.

Other than that, what specifically are you wanting to improve?

Eat the manual, or well at least digest it.

The manual is the php bible and you should aim to of read a lot of it, if nothing else, just to learn which functions are out there.

How long have you been learning for? Do you have any other programming experience?

Hi-yah:

The comments so far are vital to learning good code practices, here are some useful resource suggestions:

The online PHP reference manual - specifically the function reference - is located here. This is a great resource, both while you're learning and once you've had some experience writing code.

Also, another good way to learn is by looking at other programmer's code. A fantastic resource for butt-loads of scripts covering many different applications is www.hotscripts.com. Don't just copy their code, understand what the code is doing and why.

Of course, these forums and many other PHP programmer specific forums all over the 'net are a valuable tool once you hit a rough spot. Don't be afraid to speak up. Well, good luck to you and good programming...