vidishpurohit

<?php
require_once('wp-load.php');

global $wpdb;

$str = "SELECT post_id, meta_value FROM {$wpdb->prefix}postmeta WHERE meta_key = '_regular_price'";
$arrRes = $wpdb->get_results($str);
foreach ($arrRes as $key => $value) {
	
	update_post_meta( $value->post_id, '_price', $value->meta_value);

vidishpurohit

<?php
/**
 * Display field value on the order edit page
 */
add_action( 'woocommerce_admin_order_data_after_billing_address', 'wdt_delivery_date_admin_order_meta', 10, 1 );
function wdt_delivery_date_admin_order_meta($order){

	global $wpdb;

	$strSelect = "SELECT meta_key FROM {$wpdb->prefix}postmeta WHERE post_id = '" . $order->get_id() . "' AND meta_key LIKE '_wdt_slot_%'";

vidishpurohit

/*
* This code will add subtotal to edit order admin woocommerce.
* Author: WooExtend
* Date: 13-02-2018
*/
add_action( 'woocommerce_admin_order_totals_after_discount', 'vp_add_sub_total', 10, 1);
function vp_add_sub_total( $order_id ) {
	$order = wc_get_order( $order_id );
	?><tr>
	<td class="label">Subtotal:</td>