How to convert array into xml class in php

The method for php to convert an array into an xml class is: 1. Create a php sample file; 2. Define a php array $data; 3. Initialize the SimpleXMLElement object "$xml = new SimpleXMLElement(' ')"; 4. Create an XML tree and then output the XML string.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

PHP can convert PHP arrays to XML format by using the built-in `SimpleXMLElement` class.

The following is a basic sample code to convert a PHP array to XML format:

```php
<?php
// 定义一个 PHP 数组
$data = array(
    &#39;name&#39; => &#39;John&#39;,
    &#39;age&#39; => 30,
    &#39;email&#39; => &#39;john@example.com&#39;
);
// 初始化 SimpleXMLElement 对象
$xml = new SimpleXMLElement(&#39;<?xml version="1.0" encoding="UTF-8"?><root/>&#39;);
// 创建 XML 树
array_walk_recursive($data, array($xml, &#39;addChild&#39;));
// 输出 XML 字符串
echo $xml->asXML();
?>

In the above code, we first create a PHP association named `$data` array. We then initialized a `SimpleXMLElement` object named `$xml` and called the `array_walk_recursive()` function to create the XML tree. Finally, we use the `asXML()` function to output the XML result as a string.

The output results are as follows:

```xml
<?xml version="1.0" encoding="UTF-8"?>
<root>
  <name>John</name>
  <age>30</age>
  <email>john@example.com</email>
</root>
```

The above example is just a very basic demonstration. In actual applications, more rich and flexible methods are encapsulated as needed, such as reading the database, looping, adding attributes, etc.

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