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PHP数组输出为xml的两种常见方法

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很多时候,我们需要将数据以XML格式存储到数据库或文件中,以备后用。为了满足此需求,我们将需要将数据转换为XML并保存XML文件。在本教程中,我们将讨论如何使用PHP将数组转化为xml格式。

我们将使用以下2种方法来做到这一点。

  1. SimpleXMLElement类 
  2. DOMDocument()类

 

使用SimpleXMLElement类将数组转化为xml

SimpleXML扩展函数提供了将XML转换为对象的工具集。这些对象处理普通的属性选择器和数组迭代器。

下面的代码使用元素根创建一个xml对象。

$xml = new SimpleXMLElement('');

我们可以使用array_walk_recursive()函数将数组转换为XML文档,其中将数组的键转换为值,并将数组的值转换为XML元素。

例子:

<?php 
// Code to convert php array to xml document 
  
// Creating an array 
$my_array = array ( 
    'a' => 'x', 
    'b' => 'y', 
      
    // creating nested array 
    'another_array' => array ( 
        'c' => 'z', 
    ), 
); 
  
// This function create a xml object with element root. 
$xml = new SimpleXMLElement('<root/>'); 
  
// This function resursively added element 
// of array to xml document 
array_walk_recursive($my_array, array ($xml, 'addChild')); 
  
// This function prints xml document. 
print $xml->asXML(); 
?> 

输出:

<?xml version="1.0"? >
<root >
       <x> a </x >
       <y> b </y >
       <z> c </z >
</root >

 

使用DOMDocument()类将数组转化为xml

要使用DOMDocument创建XML,基本上,我们需要使用createElement()和 createAttribute() 方法创建标记和属性,使用appendChild()来创建XML结构 。

例子:

<?php
$name = $e['name_1'];
$email = $e['email_id'];
$phone_no =$e['phone_no'];

$doc = new DOMDocument();
$doc->formatOutput = true;

$root = $doc->createElement('StudentDetails');
$root = $doc->appendChild($root);

$ele1 = $doc->createElement('StudentName');
$ele1->nodeValue=$name;
$root->appendChild($ele1);

$ele2 = $doc->createElement('FatherEmailId');
$ele2->nodeValue=$email;
$root->appendChild($ele2);

$ele3 = $doc->createElement('PhoneNumber');
$ele3->nodeValue=$phone_no;
$root->appendChild($ele3);

$doc->save('MyXmlFile007.xml');

结果:

<?xml version="1.0"?>
<StudentDetails>
  <StudentName>Pravin Parayan</StudentName>
  <FatherEmailId>[email protected]</FatherEmailId>
  <PhoneNumber>9000012345</PhoneNumber>
</StudentDetails>

以上就是本文的全部内容,希望对大家的学习有所帮助。更多教程请访问码农之家
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