我在网上搜索以解决从媒体上传的图像大小问题。但对我来说，一个都不管用。当我尝试将媒体中的图像插入post时，它不会显示我的自定义图像大小608 X 350 px

function setup_image_sizes() {
    if ( function_exists( \'add_image_size\' ) ) {
        add_image_size( \'post-image\', 608, 350, true );
    }

    function post_image_sizes($sizes){
        $custom_sizes = array(
            \'post-image\' => \'Post Image\'
        );
        return array_merge( $sizes, $custom_sizes );
    }

    add_filter(\'image_size_names_choose\', \'post_image_sizes\');
}

add_action( \'after_setup_theme\', \'setup_image_sizes\' );