Example of creating an order for a customer using CoCart API v2 and WC API - cURL

index.php

<?php
// Get cart.
// DEV NOTE: Return the cart by default so it can return in the format WooCommerce generates the cart data in.
$curl = curl_init();

curl_setopt_array( $curl, array(
  CURLOPT_URL => "https://example.com/wp-json/cocart/v2/cart?default=true",
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTPHEADER => array(
    'Accept: application/json',
    'User-Agent: CoCart API/v2',
  )
) );

// Returns cart.
$cart = curl_exec($curl);

curl_close($curl);

// Create order.
include 'key.php';

$curl = curl_init();

$order_data = array(
    'payment_method' => 'bacs',
    'payment_method_title' => 'Direct Bank Transfer',
    'set_paid' => true,
    'billing' => array(
        'first_name' => 'John',
        'last_name' => 'Doe',
        'address_1' => '969 Market',
        'address_2' => '',
        'city' => 'San Francisco',
        'state' => 'CA',
        'postcode' => '94103',
        'country' => 'US',
        'email' => 'john.doe@example.com',
        'phone' => '(555) 555-5555'
    ),
    'shipping' => array(
        'first_name' => 'John',
        'last_name' => 'Doe',
        'address_1' => '969 Market',
        'address_2' => '',
        'city' => 'San Francisco',
        'state' => 'CA',
        'postcode' => '94103',
        'country' => 'US'
    ),
    'line_items' => array(), // Leave blank as we will be fetching items from cart.
    'shipping_lines' => array(
        [
            'method_id' => 'flat_rate',
            'method_title' => 'Flat Rate',
            'total' => '10.00'
        ]
    )
);

// Decodes customers cart so we can get the items they requested.
$cart = json_decode( $cart );

// Create line items for WC API order creation.
foreach( $cart as $item => $cart_item ) {
  $order_data['line_items'][$item] = array(
    'product_id' => $cart_item->product_id,
    'quantity' => $cart_item->quantity
  );

  if ( ! empty( $cart_item->product_name ) ) {
    $order_data['line_items'][$item]['name'] = $cart_item->product_name;
  }

  if ( ! empty( $cart_item->variation_id ) && $cart_item->variation_id > 0 ) {
    $order_data['line_items'][$item]['variation_id'] = $cart_item->variation_id;
  }

}

// Now we need to clean the line items so it is formatted correctly again.
$clean_order_data_items = array();

foreach( $order_data['line_items'] as $item ) {
  $clean_order_data_items[] = $item;
}

if ( ! empty( $clean_order_data_items ) ) {
  $order_data['line_items'] = $clean_order_data_items;
}

// Encode order data.
$args = json_encode( $order_data );

$domain = 'https://wp-demo.cocart.xyz';

// Create order.
curl_setopt_array( $curl, array(
  CURLOPT_URL => $domain . "/wp-json/wc/v3/orders",
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => $args,
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTPHEADER => array(
    'Accept: application/json',
    'Authorization: Basic ' . base64_encode($username . ':' . $password),
    'Content-Type: application/json;charset=utf-8'
  )
) );

// Order created.
$response = curl_exec($curl);

curl_close($curl);

var_dump( print_r( $response ) );

key.php

<?php
// Place your consumer key and secret in this file.
$username = 'ck_d15a6adb407ca*************';
$password = 'cs_b968b4b5d4b4e*************';