There are lots of ways you can do this, if you are passing between two of your own scripts on your own server & domain, you could use sessions.
php.net/session
or you can also use querystring ($_GET):
mypage.php?field=a&field2=b&field3=c
foreach($_GET AS $key=>$value) {
echo $key.' = '.$value.' <br />';
}
What do you need to do?