Featured Image not showing in Safari

Hi,

I’m running into some trouble customising my website.

The default setting on my wordpress site initially doesn’t show captions for my featured images. Upon customising my functions.php using a code I found online, it worked beautifully on Chrome and Firefox, but there’s a problem on Safari. The featured images are now no longer showing up.

Could anyone help?

My website is https://style-revisited.com.

The addition I made to my function.php file is as below.

<?php
function monahans_thumbnail_caption($html, $post_id, $post_thumbnail_id, $size, $attr)
{
 $attachment =& get_post($post_thumbnail_id);

 // post_title => image title
 // post_excerpt => image caption
 // post_content => image description

 if ($attachment->post_excerpt) {
   $html .= '<p class="thumbcaption">';
   if ($attachment->post_excerpt) {
     $html .= '<span class="wp-caption-text">'.$attachment->post_excerpt.'</span> ';
   }
 }

	return $html;
}

add_action('post_thumbnail_html', 'monahans_thumbnail_caption', null, 5);
?>