a.php?a=1

[slowly]

one page url

a.php?a=1 link to b.php

b.php

<?php
echo $a;
?>

what we can see

1 ?

[King Kovifor]

Please explain your question a little more.

[Bellardia]

You can see nothing on b.php

a.php link to b.php?a=1

Page b.php
<?
echo $_GET['a'];
?>

will give you the result you're looking for.

[dip1232001]

in a.php put this
<form name="get id through url" action="./b.php" method="GET" target="_self">
<input name="id" type="text" size="30" value="put here any thing you want" />
<input type="submit" name="submit" />

in b.php put this

<?php
echo $_GET['id'];
?>

or if the id is shown in a.php it self then you can use the above b.php php code in a.php to see the value which is passed through url