This is the code that I found that actually works:
<?php
require 'vendor/autoload.php';
# Replace these values. You probably want to start with your Sandbox credentials
# to start: https://docs.connect.squareup.com/articles/using-sandbox/
# The access token to use in all Connect API requests. Use your *sandbox* access
# token if you're just testing things out.
$access_token = '';
# Helps ensure this code has been reached via form submission
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
error_log("Received a non-POST request");
echo "Request not allowed";
http_response_code(405);
return;
}
# Fail if the card form didn't send a value for `nonce` to the server
$nonce = $_POST['nonce'];
if (is_null($nonce)) {
echo "Invalid card data";
http_response_code(422);
return;
}
\SquareConnect\Configuration::getDefaultConfiguration()->setAccessToken($access_token);
$locations_api = new \SquareConnect\Api\LocationsApi();
try {
$locations = $locations_api->listLocations();
#We look for a location that can process payments
$location = current(array_filter($locations->getLocations(), function($location) {
return !empty($location->getCapabilities()) &&
in_array('CREDIT_CARD_PROCESSING', $location->getCapabilities());
}));
} catch (\SquareConnect\ApiException $e) {
echo "Caught exception!<br/>";
print_r("<strong>Response body:</strong><br/>");
echo "<pre>"; var_dump($e->getResponseBody()); echo "</pre>";
echo "<br/><strong>Response headers:</strong><br/>";
echo "<pre>"; var_dump($e->getResponseHeaders()); echo "</pre>";
exit(1);
}
$transactions_api = new \SquareConnect\Api\TransactionsApi();
$request_body = array (
"card_nonce" => $nonce,
# Monetary amounts are specified in the smallest unit of the applicable currency.
# This amount is in cents. It's also hard-coded for $1.00, which isn't very useful.
"amount_money" => array (
"amount" => 100,
"currency" => "USD"
),
# Every payment you process with the SDK must have a unique idempotency key.
# If you're unsure whether a particular payment succeeded, you can reattempt
# it with the same idempotency key without worrying about double charging
# the buyer.
"idempotency_key" => uniqid()
);
# The SDK throws an exception if a Connect endpoint responds with anything besides
# a 200-level HTTP code. This block catches any exceptions that occur from the request.
try {
$result = $transactions_api->charge($location->getId(), $request_body);
echo "<pre>";
print_r($result);
echo "</pre>";
} catch (\SquareConnect\ApiException $e) {
echo "Caught exception!<br/>";
print_r("<strong>Response body:</strong><br/>");
echo "<pre>"; var_dump($e->getResponseBody()); echo "</pre>";
echo "<br/><strong>Response headers:</strong><br/>";
echo "<pre>"; var_dump($e->getResponseHeaders()); echo "</pre>";
}
