HTTP POST into PHP

Trying to figure out what is exactly POST'ed to a php file when executed
from a form. Perhaps my problem is that from the 'sender' I have several
'form' objects, each with an 'input' button to invoke the action.

I am trying to evaluate the 'array' that is POST'ed to branch to
different functions within a php script and I get varying results.

anyway, I have tried to inspect the contents of of the POST by simple
commands in my target.php file with

var_export($_POST);
var_export($_HTTP_POST_VARS);

but the thing that is really making me crazy is if I have two
consecutive lines...

$action = $_POST['OK'];
var_export($_POST['OK']);

will return different values.

It's almost as if the value of $_POST['OK'] will never die - even if I
change the 'name' of all of the '<input name="OK" value="some_value">
buttons.

So I am really left to think that the above 'var_export' commands simply
don't give me a complete dump of all of the data that is POST'ed - is
there any way to get a complete dump of this data?

Craig

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