Posting to Shopify using PHP - php

Question

I'm trying to post from a PHP page to Shopify to indicate that an order item has been fulfilled. I must not be doing this correctly because I keep getting a null result. I'm doing this on a test order that was cancelled, but I would expect that I'd at least get some sort of non-null response if that were the problem. Here is my code:
$API_KEY = 'my-api-key';
$SECRET = 'my-shared-secret';
$PASS = 'my-shopify-password';
$STORE_URL = 'mydomain.myshopify.com';
$ITEM_ID = 'my-item-id';
$ORDER_ID = 'my-order-number';
$TRACKING_NUMBER = '12345';
$TRACKING_URL = 'http:\/\/test.com\/testurl';
$baseUrl = 'https://'.$API_KEY.':'.$PASS.'#'.$STORE_URL.
'/admin/orders/'.$ORDER_ID.'/fulfillments.json';
$data = array('fulfillment' =>
array(
'tracking_number' => $TRACKING_NUMBER,
'tracking_company' => 'USPS',
'tracking_url' => $TRACKING_URL,
'line_items' =>
array(
'id'=>$ITEM_ID,
),
),
);
$session = curl_init( $baseUrl );
curl_setopt($session, CURLOPT_HEADER, false);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
curl_setopt($session, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
curl_setopt($session, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($session, CURLOPT_CUSTOMREQUEST, 'PUT');
curl_setopt($session,CURLOPT_SSL_VERIFYPEER,false);
$response = curl_exec($session);
curl_close($session);
$json = json_decode( $response, true );
var_dump($json);

Answer 1

You are sending a json in the POST section, are you sure this is what you really want to do? The post data should be more like this, sending data1=test1&data2=test2. source
<?php
$API_KEY = 'my-api-key';
$SECRET = 'my-shared-secret';
$PASS = 'my-shopify-password';
$STORE_URL = 'mydomain.myshopify.com';
$ITEM_ID = 'my-item-id';
$ORDER_ID = 'my-order-number';
$TRACKING_NUMBER = '12345';
$TRACKING_URL = 'http:\/\/test.com\/testurl';
$baseUrl = 'https://'.$API_KEY.':'.$PASS.'#'.$STORE_URL.'/admin/orders/'.$ORDER_ID.'/fulfillments.json';
$fields = array(
'lname' => urlencode($last_name),
'fname' => urlencode($first_name),
'title' => urlencode($title),
'company' => urlencode($institution),
'age' => urlencode($age),
'email' => urlencode($email),
'phone' => urlencode($phone)
);
//url-ify the data for the POST
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
rtrim($fields_string, '&');
//open connection
$ch = curl_init();
//set the url, number of POST vars, POST data
curl_setopt($session, CURLOPT_HEADER, false);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
curl_setopt($session, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
curl_setopt($session, CURLOPT_CUSTOMREQUEST, 'PUT');
curl_setopt($session, CURLOPT_URL, $baseUrl);
curl_setopt($session, CURLOPT_POST, count($fields));
curl_setopt($session, CURLOPT_POSTFIELDS, $fields_string);
//execute post
$result = curl_exec($ch);
var_dump($result);
//close connection
curl_close($ch);
?>
If you really wants to send JSON via the POST fields, maybe you are missing the length of your data : source
curl_setopt($, , CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data))
);

Answer 2

Shouldn't you be using complete.json instead ??? I may be misunderstanding but it sounds like your trying to complete a pending fulfillment.
/admin/orders/#{id}/fulfillments/#{id}/complete.json
https://docs.shopify.com/api/fulfillment#complete

Answer 3

I found the problem. Shopify requires the line items to have an additional array, so instead of this:
'line_items' =>
array(
'id'=>$ITEM_ID,
)
It should be this:
'line_items' =>
array(
array(
'id'=>$ITEM_ID,
)
)