function custom_add_image_sizes() {
add_image_size('gallery-size', 300, 300, true); // Cropped
//add_image_size('custom-size-2', 800, 600, false); // Not cropped
}
add_action('after_setup_theme', 'custom_add_image_sizes');
function custom_filter_image_sizes($sizes, $metadata) {
$image_width = $metadata['width'];
$image_height = $metadata['height'];
// Remove gallery-size if the image is too small
if ($image_width < 300 || $image_height < 300) {
unset($sizes['gallery-size']);
}
// Remove custom-size-2 if the image is too small
//if ($image_width < 800 || $image_height < 600) {
// unset($sizes['custom-size-2']);
//}
return $sizes;
}
add_filter('intermediate_image_sizes_advanced', 'custom_filter_image_sizes', 10, 2);
