优化所有图像所需的过滤器将上载：

add_filter(\'wp_handle_upload\', \'random_function\', 10, 2);
add_filter(\'image_make_intermediate_size\', \'rand_function2\', 10, 1);

function random_function($array, $string) {
// Some random action with main image
return $array
}

function rand_function2($file) {
// Some random action with cropped images
return $file
}