The problem of writing php code with emacs, Help!!

[Cheney Chen <cheneytiod@gmail.com>]

I want to use emacs to write php code..first I tried php-mode with mmm-
mode, but I found a problem soon, when I press c-j quickly, there will
be a
"Wrong type argument: stringp, nil "
then the indentation does work....I don't know how to solve it...

Recently I am using nxhtml+emacsw32, but I still find a very confusing
problem..
when I type <?php
The first line has a very well indentation, just like
<?php
    echo "test";
But when the second line is completed, when I press ";", the whole
line will move to the left most, it looks like
<?php
    echo "test";
echo "test2";
#
The cursor will move to the location of "#' above...
I am very troubled by this problem..

if someone knows how to solve it, please help me.....