PHP复杂XML到JSON解析

要将复杂的XML转换为JSON，可以使用PHP的内置函数simplexml_load_string()将XML字符串加载为SimpleXMLElement对象，然后使用json_encode()将SimpleXMLElement对象转换为JSON字符串。

以下是一个示例代码：

$xmlString = '<?xml version="1.0" encoding="UTF-8"?>
<root>
  <person>
    <name>John Doe</name>
    <age>30</age>
    <address>
      <street>Main Street</street>
      <city>City</city>
      <state>State</state>
    </address>
  </person>
  <person>
    <name>Jane Smith</name>
    <age>25</age>
    <address>
      <street>Second Street</street>
      <city>City</city>
      <state>State</state>
    </address>
  </person>
</root>';

$xmlObject = simplexml_load_string($xmlString);
$jsonString = json_encode($xmlObject);

echo $jsonString;

运行上述代码将输出以下JSON字符串：

{
   "person":[
      {
         "name":"John Doe",
         "age":"30",
         "address":{
            "street":"Main Street",
            "city":"City",
            "state":"State"
         }
      },
      {
         "name":"Jane Smith",
         "age":"25",
         "address":{
            "street":"Second Street",
            "city":"City",
            "state":"State"
         }
      }
   ]
}

这样，你就成功将复杂的XML转换为了JSON。