Crop image to horizontal or vertical by code based on image size

why didn’t use add_image_size( 'horizontal_img', 800, 300, true ); add_image_size( 'vertical_img', 300, 800, true );

And then
$image_hor = wp_get_attachment_image_src($post_id,'horizontal_img');
$image_ver = wp_get_attachment_image_src($post_id,'vertical_img');

when
echo $image_hor[0] you will get your desire sized image url.

Thanks
Musa