What common mistake is the user making in the PHP code provided for generating a table with links?

The common mistake in the provided PHP code is that the variable `$i` is not being incremented inside the loop, causing an infinite loop and resulting in an error. To fix this issue, we need to increment the `$i` variable inside the loop so that it iterates through the array properly.

<?php
$links = array("Google", "Facebook", "Twitter");

echo "<table>";
for ($i = 0; $i < count($links); $i++) {
    echo "<tr><td><a href='#'>$links[$i]</a></td></tr>";
}
echo "</table>";
?>