What's the right way of writing the following code?

I would like to know if it's possible to output a certain link from a certain collection via an url parameter like: https://www.example.com/test/index.php?col=1&number=6 (this should output the 6th link from Collection 1) and so on.

<?php
$col = $_GET['collection'];
$number = $_GET['link_number'];
}

if $col = 1 & $number = 1 { echo "My link 1" }
if $col = 1 & $number = 2 { echo "My link 2" }
if $col = 1 & $number = 3 { echo "My link 3" }
if $col = 1 & $number = 4 { echo "My link 4" }
if $col = 1 & $number = 5 { echo "My link 5" }
if $col = 1 & $number = 6 { echo "My link 6" }
if $col = 1 & $number = 7 { echo "My link 7" }
if $col = 1 & $number = 8 { echo "My link 8" }
if $col = 1 & $number = 9 { echo "My link 9" }
if $col = 1 & $number = 10 { echo "My link 10" }

if $col = 2 & $number = 1 { echo "My link 1" }
if $col = 2 & $number = 2 { echo "My link 2" }
if $col = 2 & $number = 3 { echo "My link 3" }
if $col = 2 & $number = 4 { echo "My link 4" }
if $col = 2 & $number = 5 { echo "My link 5" }
if $col = 2 & $number = 6 { echo "My link 6" }
if $col = 2 & $number = 7 { echo "My link 7" }
if $col = 2 & $number = 8 { echo "My link 8" }
if $col = 2 & $number = 9 { echo "My link 9" }
if $col = 2 & $number = 10 { echo "My link 10" }
 ?>