note 26808 modified in function.array-keys by danbrown

If you receive a bunch of variables and like to change most of them (or all of them for that matter), you can do something like this: (data has been sent to a page with POST) <?php $allKeys = array_keys($HTTP_POST_VARS); for ($i=0;$i<count($allKeys);$i++) { $$allKeys[$i] = strtoupper($HTTP_POST_VARS[$allKeys[$i]]); } ?> This makes caracters (a-z) uppercase. This is just one way to use it, ofcourse. Hope this helps someone understand the way to use array_keys() or give any ideas. :) --was-- If you receive a bunch of variables and like to change most of them (or all of them for that matter), you can do something like this: (data has been sent to a page with POST) <? $allKeys = array_keys($HTTP_POST_VARS); for ($i=0;$i<count($allKeys);$i++) { $$allKeys[$i] = strtoupper($HTTP_POST_VARS[$allKeys[$i]]); } ?> This makes caracters (a-z) uppercase. This is just one way to use it, ofcourse. Hope this helps someone understand the way to use array_keys() or give any ideas. :) http://php.net/manual/en/function.array-keys.php