subway/components/homepage/line.php

<div>
    <img src="/assets/lines/m.svg" width="64px" class="img-fluid mb-3">
    <img src="/assets/lines/<?php echo $line; ?>.svg" width="64px" class="img-fluid mb-3">

    <?php
        $stop_name = "Champs elysées";
        include 'components/homepage/stop.php';
    ?>
</div>