Today, during one of the soft redesign of Assembling I found myself in need to know whether an attachment was an image or not; the wordpress documentation did not give me any clue about how to do this – so I started to create myself the function I needed: get_the_attachment_type
It sits in my theme functions.php – and might be of any use to someone else:
<?php
function get_the_attachment_type($id = 0) {
$id = (int) $id;
$_post = & get_post($id);
$mime = $_post->post_mime_type;
return $mime;
}
?>
I use the function in the attachment.php file in the following manner:
<?php switch (get_the_attachment_type($post->ID)) {
case "image/jpeg":
case "image/gif":
case "image/png":
break;
default:?>
<p><b>Download</b>:
<?php } ?>
<?php echo $attachment_link; ?> <?php the_content(); ?>
This will then output a bold Download prompt in front of the file’s name in case, the attachment file is not an image (pdf, zip, etc.); if the attachment is an image, then nothing will be displayed.