Hello, I have a site that I have never had a problem with until I updated from PHP
5.0.4 to PHP 5.3.1, I also updated my mysql to mysqli. Needless to say my site no
longer works.

I am trying to fix this one problem at a time. My first problem is, when I click on
a link the address that is displayed in the address bar changes to the correct page
but nothing happens it remains on my index page.

This is part of the code located at the top of my page:
$baseDir = "http://".$_SERVER['HTTP_HOST'].strrev(substr(strrev($PHP_SELF),
strrpos($PHP_SELF, "/")));

And this is the code for the links:
<a href=\"".$PHP_SELF."?page=welcome\"><IMG SRC=\"images/menu/button1.gif\"
border=0></a>

I have no idea what has gone wrong, do you see a problem with this code?

THANKS in advance for any assistance you can give me

It looks like you were using register globals in 5.0; they are deprecated in 5.3. Change $PHP_SELF to $_SERVER['PHP_SELF'].

Thanks for your response. I have tried that and the links still do not work. This is how my code looks now

NEAR TOP OF PAGE:
$baseDir = "http://".$_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']);

print("

CODE FOR LINKS:
<a href=\""$_SERVER['PHP_SELF']."?page=welcome\"><IMG SRC=\"images/menu/button1.gif\" border=0></a>