decor-6-site/site/snippets/blocks/image.php

<?php

/** @var \Kirby\Cms\Block $block */
$alt     = $block->alt();
$caption = $block->caption();
$src     = $block->image()->toFile()->url();

$GLOBALS['figCount'] = ($GLOBALS['figCount'] ?? 0) + 1;
$figId = 'fig-' . Str::slug($block->parent()?->author() ?? '') . '-' . $GLOBALS['figCount'];

?>

<?php if ($src): ?>
<figure id="<?= $figId ?>">

    <img src="<?= $src ?>" alt="<?= $alt->esc() ?>">

    <?php if ($caption->isNotEmpty()): ?>
      <figcaption>
        <?= $caption->kt() ?>
      </figcaption>
    <?php endif ?>
  </figure>
 <?php endif ?>