When Page_B is first run (by clicking the submit button on another page, Page_A) the value of variable SG (which is sent over from Page_A) is nicely printed. However, when I click the submit button on Page_B (which, correct me if I'm wrong, runs Page_B again), the printing space becomes empty. I conclude that the content (value) of SG has been DELETED as a result of the submit action. That is not what I want, as this value is needed furtheron Page_B (code not yet written). How can I avoid this deleting from happening?
Here is the code of Page_B:
<html>
<?php
$SG=$_POST['SG'];
print ($SG);
?>
<form action="Page_B.php" method="POST">
<input type="text" name="trekking">
<input type="submit">
</form>
<?php
$T=$_POST['trekking'];
print ($T);
?>
</html>
