apply_filters( ‘intermediate_image_sizes_advanced’, array $new_sizes, array $image_meta, int $attachment_id )

User Contributed Notes

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   Nick Papazetis 4 years ago

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   You can exclude certain image types from images sizes, like gifs

   function wpdocs_disable_upload_sizes( $sizes, $image_meta ) {
   
       // Get filetype data.
       $filetype = wp_check_filetype( $image_meta['file'] );
   	
       $exclude_file_types = array(
       	'image/gif',
       );
   
       // Check if file type is on exclude list 
       if ( in_array( $filetype['type'], $exclude_file_types ) ) {
           $sizes = array();
       }
   
       // Return sizes you want to create from image (None if image is gif.)
       return $sizes;
   }   
   add_filter( 'intermediate_image_sizes_advanced', 'wpdocs_disable_upload_sizes', 10, 2 );