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1. Ionut
   Member
   Posted 1 year ago #
   

   Is there a way to check if a custom image size exists?

   I use a custom size image "large" in a plugin, but when it's not available I want it to fall back to the original file size or a thumbnail. How can we do this?

2. alexleonard
   Member
   Posted 1 year ago #
   

   Let's assume your large image width is 800px.
   If you do something like this it should work:

   $largeImage = wp_get_attachment_image_src($post->ID, 'large');
   
   // check if the largeImage width is equal to your setting of 800px
   if ($largeImage[1] == 800) {
     // if it is output large size
     the_post_thumbnail('large');
   } else {
     // if it isn't then show the full size image
     the_post_thumbnail('full');
   }

   I haven't tested this code, but it should work.

3. mwolstat
   Member
   Posted 1 year ago #
   

   I have this same problem, but the above solution is no good. I want to be able to test if a any image size handle exists without having to know its dimensions. i.e.

   does_image_size_exist( 'large')
does_image_size_exist( 'sm_movie_poster')
does_image_size_exist( 'sidebar_avatar')

   if the size hasn't been added with add_image_size() there are some functions I need to call before outputting the image.

4. alexleonard
   Member
   Posted 1 year ago #
   

   I haven't tested this, but you could experiment with:

   http://codex.wordpress.org/Function_Reference/get_intermediate_image_sizes

   ?

5. mwolstat
   Member
   Posted 1 year ago #
   

   Thanks, I'll look into that!

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