icingaweb2/modules/monitoring/application/views/scripts/show/components/customvars.phtml

<?php if (isset($this->customvars) && count($this->customvars)) { ?>
<div class="information-container">
    <div class="head">
         <span>Customvariables</span>
    </div>

    <div>
        <table>
            <tr>
                <th>Name</th>
                <th>Value</th>
            </tr>
            <?php foreach ($this->customvars as $name => $value) { ?>
                <tr>
                    <td><?= $this->escape($name) ?></td>
                    <td><?= $this->escape($value) ?></td>
                </tr>
            <?php } ?>
        </table>
    </div>
</div>
<?php } ?>