[英]How to display sold out message once an itemruns out of stock with PayPal smart button
I am currently working on the store for my website.我目前正在为我的网站开发商店。 I am using the PayPal Smart button for payments.
我正在使用 PayPal 智能按钮进行付款。 I was wondering how I can add a stock amount so that when stock number is 0, the ability to purchase becomes unavailable.
我想知道如何添加库存数量,以便当库存编号为 0 时,无法购买。 I've searched everywhere around the internet and could not find any answers for my question.
我在互联网上到处搜索,找不到我的问题的任何答案。 Here is my current code:
这是我当前的代码:
paypal.Buttons({
style: {
shape: 'rect',
color: 'blue',
layout: 'vertical',
label: 'paypal',
locale: 'en_CY'
},
createOrder: function(data, actions) {
return actions.order.create({
purchase_units: [{
amount: {
value: ". $row['paypal_price'] .",
currency: 'EUR'
}
}]
});
},
onApprove: function(data, actions) {
return actions.order.capture().then(function(details) {
localStorage.clear();
window.location.href = 'http://localhost/website/thankyou.php';
//alert('Transaction completed by ' + details.payer.name.given_name + '!');
$stock = 0;
});
}
}).render('#paypal-button-container');
Thank you in advance!先感谢您!
Your question is more about "how do i update my current stock" and "how do i get my current stock"您的问题更多是关于“我如何更新我当前的股票”和“我如何获得我目前的股票”
Javascript runs client-side, since you dont have your current stock-number on client-side, you will need to make Javascript communicate with your server. Javascript 运行客户端,因为您在客户端没有当前库存编号,您需要让 Javascript 与您的服务器通信。
One way to do this is via ajax.一种方法是通过 ajax。 You can use the fetch-api to accomplish this.
您可以使用fetch-api来完成此操作。
This is what you have to do:这是你必须做的:
Before you display the button (php-code):在显示按钮(php-code)之前:
<?php
// your code ...
// check stock before you echo. Only echo when $stock is > 0
$stock = /* get current stock-amount */;
if ($stock > 0) {
echo "paypal.Buttons([...";
}
Update your stock on confirmed payment:在确认付款后更新您的库存:
// your current code
localStorage.clear();
window.location.href = 'http://localhost/website/thankyou.php';
// alert('Transaction completed by ' + details.payer.name.given_name + '!');
// $stock = 0;
// add something like this
const formData = new FormData();
formData.append('amountOrdered', /* number as string */);
// maybe use await to block further processing until stock has been updated
fetch('update_stock.php', {
method: 'POST',
body: formData
});
In your new update_stock.php
:在您的新
update_stock.php
:
<?php
// update your stock-source by reducing it by $_POST['amountOrdered']
The last step you will need is to check your stock right before you create an order (JS):您需要的最后一步是在创建订单 (JS) 之前检查您的库存:
// async here needed so you can use await
createOrder: async function(data, actions) {
// check stock here
let stock = (await fetch('get_current_stock.php')).json();
let currentStock = stock['current'];
// you may want to check for amoutTryingToOrder instead of 1
if (currentStock < 1) {
alert('Out of stock, sorry :(');
return false;
}
return actions.order.create({
In your get_current_stock.php
:在您的
get_current_stock.php
中:
<?php
header('Content-Type: application/json');
$currentStock = /* get current stock */;
echo json_encode([
'current' => $currentStock
]);
Your createOrder function can return false when it's not in stock, rather than proceeding with the actions.order.create您的 createOrder function 可以在没有库存时返回 false,而不是继续执行 actions.order.create
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