How to show file type of featured image?

Question

How to show file type of featured image in post on single.php?

For example: Featured image type is: ".jpg"

I can get mime-type, like "image/jpeg".

It could be also some check of image mime-type first, for example if image mime-type is "image/jpeg" then echo ".jpg" if it is "image/gif" echo ".gif".

Answer 1

If you want to show the File type of featured image. then try the below code.

<?php
    $id1 = get_post_thumbnail_id($post->ID);
    $type =  get_post_mime_type( $id1 );
    $mime_type = explode('/', $type);
    $type = '.'.$mime_type['1'];
    echo $type;
?>

It will display the exact extension that you want ".jpeg" from "image/jpeg"
Here "$post->ID" is current post id (or the id of the post whose featured image you want ). Check if it works for you.