Wordpress - import data from CSV table with custom column names (Really Simple CSV importer plugin)

functions.php

<?php
// Goes in custom rscsvimporter_replace_save_post class before actual writing to db ($ph->add_meta, $ph->add_terms, $ph->update, $ph->insert). See here https://gist.github.com/hissy/1ea54a46fd07be9f4334

if ($meta['Title']) {
	$meta_title = $meta['Title'];
	$post['post_title'] = trim($meta_title);
}

$tax_map = array(
	'Region' => 'regregion',
	'Registry' => 'regcat'
);

foreach ($tax_map as $tax_human => $tax_wp) {
	if (isset($meta[$tax_human])) {
		$meta_terms = explode(',',$meta[$tax_human]);
		$_terms = array();
		foreach ($meta_terms as $meta_term) {
			if (term_exists($meta_term,$tax_wp)) {
				$_terms[] = $meta_term;
			}
		}
		$terms[$tax_wp] = $_terms;
		unset($meta[$tax_human]);
	}
}


$meta_map = array(
	'Custom field 1' => 'mysite_cf1',
	'Custom field 2' => 'mysite_cf2',
	'Custom field 3' => 'mysite_cf3'
);

foreach ($meta_map as $meta_human => $meta_wp) {
	if (isset($meta[$meta_human])) {
		$meta[$meta_wp] = preg_replace('/\s+/', ' ', trim($meta[$meta_human]));
		unset($meta[$meta_human]);
	}
}