Gazelle/sections/sitehistory/edit.php

<?php
#declare(strict_types = 1);

if (!check_perms('users_mod')) {
    error(403);
}
if (is_number($_GET['id'])) {
    $ID = $_GET['id'];
    $Event = SiteHistory::get_event($ID);
}

if ($ID) {
    $Title = "Edit";
} else {
    $Title = "Create";
}
View::show_header(
    $Title,
    "vendor/jquery.validate.min,form_validate,site_history"
);

?>

<div class="header">
  <?php if ($ID) { ?>
  <h2>Edit event</h2>
  <?php } else { ?>
  <h2>Create new event</h2>
  <?php } ?>
</div>

<?php
SiteHistoryView::render_edit_form($Event);
View::show_footer();