How can CSS be utilized to customize the appearance of images in a PHP link menu?

To customize the appearance of images in a PHP link menu using CSS, you can apply styles to the image elements within the menu. This can include adjusting the size, position, border, or any other visual properties of the images. By targeting the image elements with CSS, you can easily customize their appearance to match the design of your website.

<?php
echo '<div class="menu">';
echo '<a href="#"><img src="image1.jpg" class="menu-image"></a>';
echo '<a href="#"><img src="image2.jpg" class="menu-image"></a>';
echo '<a href="#"><img src="image3.jpg" class="menu-image"></a>';
echo '</div>';
?>
```

```css
.menu-image {
  width: 100px;
  height: 100px;
  border: 2px solid black;
  border-radius: 50%;
  margin: 5px;
}