如何在PHP中解析XML

Hi guys I am trying to pharse an xml file in php using simplexmlelement.

嗨伙计们，我正在尝试使用simplexmlelement在php中解析xml文件。

 <OrderResponse>
      <OrderResponseReferences>
           <BuyersOrderNumber Preserve="true">100000002</BuyersOrderNumber>
           <SuppliersOrderReference Preserve="true">6711637</SuppliersOrderReference>
      </OrderResponseReferences>
 </OrderResponse>

I am using the code below to access BuyersOrderNumber

我使用下面的代码访问BuyersOrderNumber

$local_file_path = "C:/etrade_files/Orders/order_acknowledgements/ORA1707220-05-2015--16-48-31.xml";

$xml = simplexml_load_file($local_file_path);

foreach($xml->children() as $child) 
{
    $child = $child->getName();

    if($child == "OrderResponseReferences")
    {
        $order_reference = $xml->$child->BuyersOrderNumber;

        print_r($order_reference);
    }   
}

Result:

结果：

 SimpleXMLElement Object ( [@attributes] => Array ( [Preserve] => true ) [0] => 100000002 )

How can I just get the order number which is 100000002

我怎样才能获得100000002的订单号

Also this files have multiple order lines it would really help me if someone can explain the logic I can use to get all the required information.

此文件还有多个订单行，如果有人可以解释我可以使用的逻辑来获取所有必需的信息，它将真正帮助我。

 <OrderResponseLine>
      <LineNumber>1</LineNumber>
      <OrderResponseLineReferences>
           <BuyersOrderLineReference Preserve="true">100000002</BuyersOrderLineReference>
      </OrderResponseLineReferences>
      <Product>
           <SuppliersProductCode>108696</SuppliersProductCode>
      </Product>
      <Quantity>
           <Amount>2</Amount>
      </Quantity>
      <LineTotal>331.18</LineTotal>
 </OrderResponseLine>

It is my first time working with xml I would really appreciate if someone could help. Thank you.

这是我第一次使用xml我真的很感激，如果有人可以提供帮助。谢谢。

4 个解决方案

#1

If you cast the object to a string, it'll use its value and convert that:

如果将对象强制转换为字符串，它将使用其值并转换为：

print_r((string) $order_reference);
// 100000002

I tried your code and you're doing well! Just the (string) should be enough to get the script running.

我尝试了你的代码，你做得很好！只需（字符串）就足以让脚本运行了。

#2

I would recommend you to use DOM in order to parse this XML.

我建议你使用DOM来解析这个XML。

$xml = new DOMDocument();
$xml->load('ORA1707220-05-2015--16-48-31.xml');
$root = $xml->getElementsByTagName('OrderResponse');
$tree = $root->item(0);
$child = $tree->childNodes;
foreach($child as $children){
    switch($children->nodeName){
         case 'OrderResponseReferences':
             //instructions
    }
}

And use nodeValue to get value of the node.

并使用nodeValue获取节点的值。

#3

DOMDocument and recursive function seems me working to get this value.

DOMDocument和递归函数似乎我正在努力获得这个值。

$xml = new DOMDocument();
$xml->load('ORA1707220-05-2015--16-48-31.xml');
$root = $xml->getElementsByTagName('OrderResponse');
$tree = $root->item(0);

parse($tree);

function parse($tree){
    $child = $tree->childNodes;

    foreach($child as $children){
        switch($children->nodeName){
             //Case
                 //instructions
        }


        if($child->hasChildNodes())
            parse($child);
        }

 }

If there's subnodes in the current node, it will call parse() again on the child, and you'll get the value yu want

如果当前节点中有子节点，它将再次调用子节点上的parse（），你将得到yu想要的值

#4

There are much easier ways:

有更简单的方法：

retrieve many <BuyersOrderNumber>:

检索许多：

use xpath:

使用xpath：

$numbers = $xml->xpath("//BuyersOrderNumber");

Explanation:

说明：

the xpath statement will select any <BuyersOrderNumber>
xpath语句将选择任何
anywhere in the XML tree (due to the // in front of the node name)
XML树中的任何位置（由于节点名称前面的//）
$numbers will hold an array of SimpleXML elements
$ numbers将包含一系列SimpleXML元素

Output all nodes:

输出所有节点：

foreach ($numbers as $n)
    echo $n;

retrieve one single <BuyersOrderNumber> node

检索一个节点

the standard way: if there is only one such node in the XML:

标准方式：如果XML中只有一个这样的节点：
```
echo $xml->OrderResponseReferences->BuyersOrderNumber;
```
again xpath:

再次xpath：
```
echo $xml->xpath("//BuyersOrderNumber")[0];
```
get all nodes and echo the first one only (that's why the [0])

获取所有节点并仅回显第一个节点（这就是为什么[0]）

see a working example: https://eval.in/368739

看一个有效的例子：https：//eval.in/368739

Of course, $xml in the examples is..

当然，示例中的$ xml是..

$xml = simplexml_load_file($local_file_path);

Reference: http://php.net/manual/en/simplexml.examples-basic.php

参考：http：//php.net/manual/en/simplexml.examples-basic.php

#1