如何访问 PHP 中的 JSON 元素，如数组对象？答案

【问题标题】：How can I access JSON elements in PHP like array object?如何访问 PHP 中的 JSON 元素，如数组对象？
【发布时间】：2018-05-30 14:01:21
【问题描述】：

通过触发this Webhook，我收到一个order object，当我在电子邮件中输出它时，它看起来像这样：

数组{"id":1154,"parent_id":0,"status":"pending","currency":"EUR","version":"3.2.3","prices_include_tax":true," date_created":{"日期":"2017-12-15 15:58:42.000000","timezone_type":1,"timezone":"+00:00"},"date_modified":{"date":"2017-12-15 15:58:42.000000","timezone_type":1,"timezone":"+00:00"},"discount_total":"0","discount_tax":"0","shipping_total":"0"," shipping_tax":"0","cart_tax":"0","total":"6.50","total_tax":"0","customer_id":0,"order_key":"wc_order_5a33f1321ba43","billing":{ "first_name":"Peter","last_name":"Parker","company":"","address_1":"Baker Str.","address_2":"2","city":"London","state":"","postcode":"50668","country":"DE","email":"something@ gmail.com","phone":"01627423"},"shipping":{"first_name":"Peter","last_name":"Parker","company":"","address_1":"Baker Str.","address_2":"2","city":"London","state":"","postcode":"50668","country":"DE"},"payment_method":"cod ","payment_method_title":"贝 Abholung","交易 _id":"","customer_ip_address":"...","customer_user_agent":"mozilla/5.0 (macintosh; intel mac os x 10_13_2) applewebkit/537.36 (khtml, like 壁虎）铬/blabla safari/537.36","created_via":"checkout","customer_note":"","date_completed":null,"date_paid":null,"cart_hash":"be97db19eba58864b9166961ce22a706","number":"1154","meta_data ":[{"id":4731,"key":"_billing_title","value":"1"},{"id":4732,"key":"_shipping_title","value":"1"} ],"line_items":{"18":{}},"tax_lines":[],"shipping_lines":{"19":{}},"fee_lines":[],"coupon_lines":[]}

能否请您指出一种访问此 JSON 元素的可能性，以便我可以从 $order 对象的某些部分构建消息？我尝试将$data = json_decode($order) 与$data->date_created 结合使用，但是当我丢弃最后一部分时，这并没有给我任何帮助。

【问题讨论】：

标签： php json woocommerce

【解决方案1】：

它是 json，除了开头的 Array 部分（假设那是您尝试访问 date_created）：

您可以像以前一样使用json_decode()，但date_created 也是一个数组，因此您还需要从中选择您想要的项目。

$data = json_decode($order, true);

echo $data['date_created']['date']; // 2017-12-15 15:58:42.000000

因此，如果您想要客户名称，例如：

echo $data['billing']['first_name'].' '.$data['billing']['last_name'];

通过print_r($data)'ing，您可以看到它的结构。

如果您想要简单输出，您可以使用递归函数遍历数组，该函数将生成您的电子邮件。

echo '<h2>Order Details</h2>'.PHP_EOL;
echo order_details(json_decode($json, true));

function order_details($items, $str = null) {   
    foreach ($items as $key => $item) {
        if (is_array($item)) {
            $str .= PHP_EOL.'<h3>'.ucwords(str_replace('_', ' ', $key)).'</h3>'.PHP_EOL;
            $str .= order_details($item, $str);
        } else {
            $str .= '<b>'.ucwords(str_replace('_', ' ', $key)).'</b>: '.$item.'</br>'.PHP_EOL;
        }
    }
    return $str;
}

输出如下：https://3v4l.org/l9BS4

<h2>Order Details</h2>
<b>Id</b>: 1154</br>
<b>Parent Id</b>: 0</br>
<b>Status</b>: pending</br>
<b>Currency</b>: EUR</br>
<b>Version</b>: 3.2.3</br>
<b>Prices Include Tax</b>: 1</br>

<h3>Date Created</h3>
<b>Date</b>: 2017-12-15 15:58:42.000000</br>
<b>Timezone Type</b>: 1</br>
<b>Timezone</b>: +00:00</br>

<h3>Date Modified</h3>
<b>Date</b>: 2017-12-15 15:58:42.000000</br>
<b>Timezone Type</b>: 1</br>
<b>Timezone</b>: +00:00</br>
<b>Discount Total</b>: 0</br>
<b>Discount Tax</b>: 0</br>
<b>Shipping Total</b>: 0</br>
<b>Shipping Tax</b>: 0</br>
<b>Cart Tax</b>: 0</br>
<b>Total</b>: 6.50</br>
<b>Total Tax</b>: 0</br>
<b>Customer Id</b>: 0</br>
<b>Order Key</b>: wc_order_5a33f1321ba43</br>

<h3>Billing</h3>
<b>First Name</b>: Peter</br>
<b>Last Name</b>: Parker</br>
<b>Company</b>: </br>
<b>Address 1</b>: Baker Str.</br>
<b>Address 2</b>: 2</br>
<b>City</b>: London</br>
<b>State</b>: </br>
<b>Postcode</b>: 50668</br>
<b>Country</b>: DE</br>
<b>Email</b>: something@gmail.com</br>
<b>Phone</b>: 01627423</br>

<h3>Shipping</h3>
<b>First Name</b>: Peter</br>
<b>Last Name</b>: Parker</br>
<b>Company</b>: </br>
<b>Address 1</b>: Baker Str.</br>
<b>Address 2</b>: 2</br>
<b>City</b>: London</br>
<b>State</b>: </br>
<b>Postcode</b>: 50668</br>
<b>Country</b>: DE</br>
<b>Payment Method</b>: cod</br>
<b>Payment Method Title</b>: Bei Abholung</br>
<b>Transaction  Id</b>: </br>
<b>Customer Ip Address</b>: ...</br>
<b>Customer User Agent</b>: mozilla/5.0 (macintosh; intel mac os x 10_13_2) applewebkit/537.36 (khtml, like gecko) chrome/blabla safari/537.36</br>
<b>Created Via</b>: checkout</br>
<b>Customer Note</b>: </br>
<b>Date Completed</b>: </br>
<b>Date Paid</b>: </br>
<b>Cart Hash</b>: be97db19eba58864b9166961ce22a706</br>
<b>Number</b>: 1154</br>

<h3>Meta Data</h3>

<h3>0</h3>
<b>Id</b>: 4731</br>
<b>Key</b>: _billing_title</br>
<b>Value</b>: 1</br>

<h3>1</h3>
<b>Id</b>: 4732</br>
<b>Key</b>: _shipping_title</br>
<b>Value</b>: 1</br>

<h3>Line Items</h3>

<h3>18</h3>

<h3>Tax Lines</h3>

<h3>Shipping Lines</h3>

<h3>19</h3>

<h3>Fee Lines</h3>

<h3>Coupon Lines</h3>

【讨论】：

谢谢！ Array 是输出的一部分，而不是我尝试的一部分。我只是将$order 添加为电子邮件的消息正文。我认为这是我无法正确访问 JSON 的部分问题！？
你应该检查它是否在$order的字符串中，如果是你应该找到它被添加的地方并修复它，因为它不应该在那里，如果它不是json_decode($order, true)应该返回一个数组，如果是，它将返回null。如果您由于某种原因无法删除它，您可以随时通过检查它是否存在以及是否将其剥离来解决 - 3v4l.org/Hule3

【解决方案2】：

当你使用时

$data = json_decode($order);

它会创建一个对象，将这个对象转换成一个关联数组你只需要传递一个参数

$data = json_decode($order, true);

【讨论】：