[Really Simple CSV Importer] Example: import image from url to custom field

really-simple-csv-importer-addon.php

<?php
/*
Plugin Name: Get Remote Image to Custom Field
*/

add_filter('really_simple_csv_importer_post_saved', function($post)
{
    if (is_object($post)) {
        // Get the meta data of which key is "image"
        $image = $post->image;

        // Create a instance of helper class
        $h = RSCSV_Import_Post_Helper::getByID($post->ID);

        // Get the remote image data
        $file = $h->remoteGet($image);

        // Then, attach it
        $attachment_id = $h->setAttachment($file);

        // Finally, replace the original data with the attachment id
        $h->setMeta( array( 'image' => $attachment_id ) );
    }
});

You can do it, but I don't provide sample codes for all cases. Please try it by yourself.

@hissy How to post a bug?

If post category contains comma it will be treated as new category.

For example:
Category 1: Bike, Motorcycle, Other 2 Wheel Vehicle
Category 2: Vehicle Accessory

I have tried woocommerce way of importing like:
Bike, Motorcycle, Other 2 Wheel Vehicle, Vehicle Accessory
Bike, Motorcycle, Other 2 Wheel Vehicle, Vehicle Accessory

It will always end up like:
Category 1: Bike
Category 2: Motorcycle
Category 3: Other 2 Wheel Vehicle
Category 4: Vehicle Accessory

How to fix this?

@erikdemarco You can make a support thread on the official forum: https://wordpress.org/support/plugin/really-simple-csv-importer/