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How to check if a custom image size exists?

  • 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?

Viewing 4 replies - 1 through 4 (of 4 total)
  • 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.

    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.

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

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

    ?

    Thanks, I’ll look into that!

Viewing 4 replies - 1 through 4 (of 4 total)
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