FLASH & PHP - accessing variables

Hi everyone,

I have also posted this in alt.php but with no answer yet, hope someone can
help...

I have been using php for a while, but now i am having a go with flash and
passing variables to php to access mysql database.

Though I can do all this fine, one thing is confusing me in my current
limited knowledge of this. I hope I can explain this clearly enough...

If a swf is being loaded in a php page that has a get or post variable
available,
eg. $_REQUEST['myVar'] = "myValue", why can't I access these from the php
being called with sendAndLoad() in the swf?
Is there a way to send these along with sendAndLoad()? How would I get these
variables into the swf?
I know that a query string can be hard coded into the <PARAM> tag, but the
problem with this is that the variables are dynamic, there could be heaps of
them and they are sometimes POST vars as well.

I could be missing something really basic here, and I have searched
extensively in the groups and web to shed some light.
If anyone has any suggestions, I would greatly appreciate it.

Cheers

John