how does one create a query from a hypertext link

How do I create a query from a hypertext link using php?

Do you mean from the data in the query string?

For example:

< a href="foo.php?bah=blah&zoot=zog">foo</a>


<?php

$bah = $_GET["bah"]; // value of $bah sould be"blah"
$zoot = $_GET["zoot"]; // value of $zoot should be "zog"

$sql = "SELECT * from $bah WHERE zoot='$zoot'";

?>