What are the limitations of CSS alone in achieving the desired effect of displaying a large image when hovering over a thumbnail in PHP?

CSS alone cannot dynamically change the source of an image when hovering over a thumbnail. To achieve this effect in PHP, you can use JavaScript to handle the hover event and change the image source accordingly. This way, you can display a larger image when hovering over a thumbnail. 

<!DOCTYPE html>
<html>
<head>
  <style>
    .thumbnail {
      width: 100px;
      height: 100px;
    }
    .large-image {
      display: none;
    }
  </style>
</head>
<body>

<img src="thumbnail.jpg" class="thumbnail" onmouseover="showLargeImage()" onmouseout="hideLargeImage()">
<img src="large-image.jpg" class="large-image">

<script>
  function showLargeImage() {
    document.querySelector('.large-image').style.display = 'block';
  }

  function hideLargeImage() {
    document.querySelector('.large-image').style.display = 'none';
  }
</script>

</body>
</html>

Keywords

CSS limitations large image hovering thumbnail

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