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Items Covered:
  1. Adjusting the http file upload limit to allow more kbs.
  2. Oh damn! I can't use registered globals now!
  3. PHP Compiling lstdcc++ Error

Adjusting the http file upload limit to allow more kbs.
I think the default limit in PHP for http uploads is set 2M in the php.ini file. The default location of php.ini is a compile time option. In most Red Hat distros it is located at /etc/php.ini.

If uploads are not working at all make sure:
file_uploads = On

You can adjust the amount allowed by changing:
upload_max_filesize = 2M

Since most uploads are done as POSTS thru forms make sure post_max_size is equal to or larger then upload_max_filesize.
post_max_size = 8M

HINT:
When you're having troubles uploading files using Apache 2, try to use
upload_max_filesize = 6291456;
instead of
upload_max_filesize = 6M;
that should work!

Oh damn! I can't use registered globals now!
The esiest way to get around this is to add php_flag register_globals on to a .htaccess file in your website root directory. This override with work if your sever settings allow it.
PHP Compiling lstdcc++ Error
While trying to compile PHP 5 on a old Red Hat 7.3 system during make I would get the error: 
lcrypt  -o sapi/cli/php
/usr/bin/ld: cannot find -lstdc++
collect2: ld returned 1 exit status
make: *** [sapi/cli/php] Error 1
Here was the solution I found:
You need to make a symbolic link to the libstdc++ libraries. EXAMPLE:

[root@zim php-5.0.0RC3]# ln -s /usr/lib/libstdc++-3-libc6.2-2-2.10.0.so /usr/lib/libstdc++.so
[root@zim php-5.0.0RC3]# ln -s /usr/lib/libstdc++-3-libc6.2-2-2.10.0.a /usr/lib/libstdc++.a