Payment api multidimensional array issue in php - php

Question

My payment provider issued the following example code for their API:
$order = $mollie->orders->create([
"amount" => [
"value" => "1027.99",
"currency" => "EUR"
],
"billingAddress" => [
"streetAndNumber" => "Keizersgracht 313",
"postalCode" => "1016 EE",
"city" => "Amsterdam",
"country" => "nl",
"givenName" => "Luke",
"familyName" => "Skywalker",
"email" => "luke#skywalker.com",
],
"shippingAddress" => [
"streetAndNumber" => "Keizersgracht 313",
"postalCode" => "1016 EE",
"city" => "Amsterdam",
"country" => "nl",
"givenName" => "Luke",
"familyName" => "Skywalker",
"email" => "luke#skywalker.com",
],
"metadata" => [
"order_id" => $orderId
],
"consumerDateOfBirth" => "1958-01-31",
"locale" => "en_US",
"orderNumber" => strval($orderId),
"redirectUrl" => "{$protocol}://{$hostname}{$path}/orders/return.php?order_id={$orderId}",
"webhookUrl" => "{$protocol}://{$hostname}{$path}/orders/webhook.php",
"method" => "ideal",
"lines" => [
[
"sku" => "5702016116977",
"name" => "LEGO 42083 Bugatti Chiron",
"productUrl" => "https://shop.lego.com/nl-NL/Bugatti-Chiron-42083",
"imageUrl" => 'https://sh-s7-live-s.legocdn.com/is/image//LEGO/42083_alt1?$main$',
"quantity" => 2,
"vatRate" => "21.00",
"unitPrice" => [
"currency" => "EUR",
"value" => "399.00"
],
"totalAmount" => [
"currency" => "EUR",
"value" => "698.00"
],
"discountAmount" => [
"currency" => "EUR",
"value" => "100.00"
],
"vatAmount" => [
"currency" => "EUR",
"value" => "121.14"
]
],
[
"type" => "digital",
"sku" => "5702015594028",
"name" => "LEGO 42056 Porsche 911 GT3 RS",
"productUrl" => "https://shop.lego.com/nl-NL/Porsche-911-GT3-RS-42056",
"imageUrl" => 'https://sh-s7-live-s.legocdn.com/is/image/LEGO/42056?$PDPDefault$',
"quantity" => 1,
"vatRate" => "21.00",
"unitPrice" => [
"currency" => "EUR",
"value" => "329.99"
],
"totalAmount" => [
"currency" => "EUR",
"value" => "329.99"
],
"vatAmount" => [
"currency" => "EUR",
"value" => "57.27"
]
]
]
]);
What I'd like to do is to replace the hard coded second dimension "lines" with data from these session vars.
foreach ($_SESSION['cart_products'] as $cart_itm) {
$name = $cart_itm['cat_item_titel_' . $lang . ''];
$unitPrice = $cart_itm['cat_item_prijs'];
$sku = $cart_itm['cat_item_code'];
}
And this is the solution I came up with but this just doesn't work. The reason, I assume, is that the data in the $orders array is echoed as a string and not functional code as i should be. But I haven't got a clue how to aproach this issue.
$i = 0;
$lngth = count($_SESSION['cart_products']);
foreach ($_SESSION['cart_products'] as $cart_itm) {
$orders[] = '[';
$orders[] .= '"sku" => ' . $cart_itm['cat_item_code'] . ',';
$orders[] .= '"name" => ' . $cart_itm['cat_item_titel_en'] . ',';
$orders[] .= '"quantity" => 1,';
$orders[] .= '"vatRate" => "0.00",';
$orders[] .= '"unitPrice" => [
"currency" => "EUR",
"value" => "15.50"],';
$orders[] .= '"totalAmount" => [
"currency" => "EUR",
"value" => "15.50"],';
$orders[] .= '"vatAmount" => [
"currency" => "EUR",
"value" => "0.00"]';
if ($i == $lngth - 1) {
$orders[] .= ']';
}
else {
$orders[] .= '],';
}
$i++;
}
$echoOrders = implode($orders);
$order = $mollie->orders->create([
"amount" => [
"value" => "15.50",
"currency" => "EUR"
],
"billingAddress" => [
"streetAndNumber" => $address,
"postalCode" => $postalcode,
"city" => $city,
"country" => $country,
"givenName" => $firstname,
"familyName" => $name,
"email" => $email,
],
"shippingAddress" => [
"streetAndNumber" => $addressa,
"postalCode" => $postalcodea,
"city" => $citya,
"country" => $countrya,
"givenName" => $firstnamea,
"familyName" => $namea,
"email" => $email,
],
"metadata" => [
"order_id" => $orderId
],
"locale" => "nl_BE",
"orderNumber" => strval($orderId),
"redirectUrl" => "{$protocol}://{$hostname}{$path}/thankyou.php?order_id={$orderId}",
"webhookUrl" => "https://www.cluster-park.com/dev/includes/webhook.php",
"lines" => [ $echoOrders ]
]);
All suggestions are more than welcome.
Thanks!

Answer 1

You need to build an associative array, at the moment you are building a string. This should give you a starting point...
$lines = [];
foreach ($_SESSION['cart_products'] as $cart_itm) {
$lines[] = [ "sku" => $cart_itm['cat_item_code'],
"name" => $cart_itm['cat_item_titel_en'],
"quantity" => 1,
"vatRate" => "0.00",
"unitPrice" => [
"currency" => "EUR",
"value" => "15.50"]
],
// Add all of the other data you have
];
}
then later in your code, you add them in using...
"lines" => $lines