making clickable text from php script

Question

I have a php script below

Answer 1

Please echo the values inside anchor tag as

<?php

include 'db_connector.php';
$result = mysqli_query($con, "SELECT operation FROM contract");
while ($row = mysqli_fetch_array($result)) {
    echo "<a href='your url' >" . $row['operation'] . "</a>";
    echo "<br>";
    echo "<br>";
}

Answer 2

echo "<a href='whatever_your_url_is'>".$row['operation']."</a>";