我如何访问PHP中的JSON元素，比如数组对象？

Question

通过触发这个Webhook，我收到一个订单对象，当我在电子邮件中输出它时，它如下所示：

数组{“id”：1154,“parent_id”：0,“status”：“pending”,“currency”：“eur”,“version”：“3.2.3”,“prices_include_tax”：true,“date_created”：{“date”：“2017-12-15 15:58:42.000000”,“timezone_type”：1,“timezone_type”：1,“timezone_type”：“+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”：“html" target="_blank">parker”,“company”：“address_1”：“baker str”,“address_2”：“2”,“city”：“london”,“state”[e-mail]“，”电话“：”01627423“}，”运输“：{”first_name“：”彼得“，”last_name“：”帕克“，”公司“：”“，”地址_1“：”贝克str.“，”地址_2“：”2“，”城市“：”伦敦“，”州“：”“，”邮政编码“：”50668“，”国家“：”de“}，”payment_method“：”cod“，”payment_method_title“：”bei abholung“，”transaction_id“：”“customer_ip_address”：“...”，“/5.0（Macintosh；intel mac os x 10_132)AppleWebKit/537.36（khtml,like gecko）Chrome/blabla Safari/537.36“,”created_via“：”checkout“,”customer_note“：”“date_completed”：null,“date_payed”：null,“cart_hash”：“be97db19eba58864b9166961ce22a706”,“number”：“1154”,“meta_data”：[{“id”：4731,“key”：“：”_shipping_title“,”value“：”1“}],”line_items“：{”18“：{}},”tax_lines“：[],”shipping_lines“：{”19“：{}},”fee_lines“：[],”coupon_lines“：[]}

您能告诉我访问这个JSON元素的可能性吗，这样我就可以从$order对象的某些部分构造消息了？我尝试将$data=json_decode($order)与$data->date_created结合使用，但当我转储最后一部分时，这并没有给我任何帮助。

Answer 1

它是json，除了开始的数组部分（假设您试图访问date_create):

您可以像以前一样使用json_decode()，但是date_create也是一个数组，因此您还需要选择要从中选择的项。

$data = json_decode($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'];

Array
(
    [id] => 1154
    [parent_id] => 0
    [status] => pending
    [currency] => EUR
    [version] => 3.2.3
    [prices_include_tax] => 1
    [date_created] => Array
        (
            [date] => 2017-12-15 15:58:42.000000
            [timezone_type] => 1
            [timezone] => +00:00
        )

    [date_modified] => Array
        (
            [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] => Array
        (
            [first_name] => Peter
            [last_name] => Parker
            [company] => 
            [address_1] => Baker Str.
            [address_2] => 2
            [city] => London
            [state] => 
            [postcode] => 50668
            [country] => DE
            [email] => [e-mail]
            [phone] => 01627423
        )

    [shipping] => Array
        (
            [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] => Bei Abholung
    [transaction _id] => 
    [customer_ip_address] => ...
    [customer_user_agent] => mozilla/5.0 (macintosh; intel mac os x 10_13_2) applewebkit/537.36 (khtml, like gecko) chrome/blabla safari/537.36
    [created_via] => checkout
    [customer_note] => 
    [date_completed] => 
    [date_paid] => 
    [cart_hash] => be97db19eba58864b9166961ce22a706
    [number] => 1154
    [meta_data] => Array
        (
            [0] => Array
                (
                    [id] => 4731
                    [key] => _billing_title
                    [value] => 1
                )

            [1] => Array
                (
                    [id] => 4732
                    [key] => _shipping_title
                    [value] => 1
                )

        )

    [line_items] => Array
        (
            [18] => Array
                (
                )

        )

    [tax_lines] => Array
        (
        )

    [shipping_lines] => Array
        (
            [19] => Array
                (
                )

        )

    [fee_lines] => Array
        (
        )

    [coupon_lines] => Array
        (
        )

)

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;
}

<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>: [e-mail]</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>