note 3332 deleted from Variables from outside PHP by ronabop

i've run into an odd problem that i cannot figure out. input would be greatly appreciated. the situation is as follows: i have a php script with a form and it basically calls itself and does stuff based on the form parameters it recieves (the innerworkings of which are negligible for the purposes of the issue at hand). there are certain (additional) parameters that i need to pass through to each calling of the script. for demostration purposes, you can assume that at the first calling of the script i will be setting those parameters manually. when i do so (i.e., i type into my browser: http://urlandfilepath?x=1&y=2, etc.) and submit the form (using post) the parameters that i have inserted manually (x, y, etc.) remain in the url as planned (without re-setting the parameters as hidden form elements, etc.). however, when i wrote a simple test script to examine why this is the case, the manually-entered parameters are cleared upon submitting the form. i cannot figure out what the distinction between the two forms could be, as i cannot find anywhere (in the php itself or even in the javascript in the file, etc.) where it explicitly re-sets my manually-set parameters. instead it seems as though it is passing them through automatically. (but not doing so in my test script) the easy way to handle this is to set hidden form elements based on the parameters. however, i don't want to do this if it is redundant, and more importantly i would like to figure out why my current script is behaving as it is. if this indicates some sort of way that php will make persistent certain document-level parameters somehow (across repeated self-calls of a php script), i would like to find more about it and use it!