Create new image sizes for custom post types
By default WordPress creates three images sizes for every picture uploaded to your media library. If you want to create a new size for custom post types you can copy this code to your functions file. So instead of using “thumbnail” you can use “your_image_size_1” or whatever you decide. Make sure to set values for your new size with the add_image_size function
/** * Snippet Name: Create new image sizes for custom post types * Snippet URL: https://wpcustoms.net/snippets/create-new-image-sizes-for-custom-post-types/ */ add_filter( 'intermediate_image_sizes', 'ravs_slider_image_sizes', 999 ); function ravs_slider_image_sizes( $image_sizes ){ // size for slider $slider_image_sizes = array( 'your_image_size_1', 'your_image_size_2' ); // for ex: $slider_image_sizes = array( 'thumbnail', 'medium' ); // instead of unset sizes, return your custom size for slider image if( isset($_REQUEST['post_id']) && 'your_custom_post_type' === get_post_type( $_REQUEST['post_id'] ) ) return $slider_image_sizes; return $image_sizes; } // to create a custom size you can use this: add_image_size('your_image_size_1',100,100,true); // Crop mode add_image_size('your_image_size_2',400,500); // Resize mode