Thinkly Blog ? 通用php数组（array）与xml相互转换函数

最近做一个项目，需要和其他的程序进行对接，xml是交互数据的首选，所以，我需要一个函数能把php的数组转换成xml字符串，又同时可以把字符串再还原回php数组，其实是很简单的递归调用，发出来备用

函数定义：

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01./* 将数组格式化为XML字符串 */

02.function array2xml($array,$level = 0){

03.    $return = '';

04.    if($level == 0){

05.        $return = '<?xml version="1.0" encoding="utf-8" ?><root>';

06.    }

07.    foreach($array as $key => $item){

08.        if(!is_array($item)){

09.            $return .= "<item key='{$key}'>{$item}</item>";

10.        }else{

11.            $return .= "<item key='{$key}'>";

12.            $return .= array2xml($item,$level + 1);

13.            $return .= "</item>";

14.        }

15.    }

16.    if($level == 0){

17.        $return .= '</root>';

18.    }

19.    return $return;

20.}

21.  

22./* 辅助函数用来获取DOM跟节点 */

23.function getXmlRoot($xml){

24.    $doc = new DOMDocument();

25.    $doc->loadXML($xml);

26.    $root = $doc->documentElement;

27.    return $root;

28.}

29.  

30./* 将被array2xml格式化的XML还原 */

31.function xml2array($xml){

32.    $return_array = array();

33.    foreach($xml->childNodes as $node){

34.        $length = $node->childNodes->length;

35.        $key = $node->getAttribute('key');

36.        if($length == 1 and $node->firstChild->nodeType == XML_TEXT_NODE){

37.            $return_array[$key] = $node->nodeValue;

38.        }else{

39.            $return_array[$key] = xml2array($node);

40.        }

41.    }

42.    return $return_array;

43.}

使用方法：

1. array转换为xml

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01.$array = array(

02.    'aaa' => array(

03.        'title' => 'random test',

04.        'value' => md5(microtime())

05.    ),

06.    'bbb' => array(

07.        'title' => 'fixed test',

08.        'value' => '2010-01-01'

09.    ),

10.    'ccc' => 'this is c',

11.    'ddd' => array(

12.        array(

13.            time()

14.        ),

15.        array(

16.            time()

17.        ),

18.        array(

19.            time()

20.        ),

21.        array(

22.            time()

23.        )

24.    )

25.);

26.  

27.$xml = array2xml($array);

28.echo $xml;

运行结果为：

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01.  <?xml version="1.0" encoding="utf-8" ?>

02.- <root>

03.- <item key="aaa">

04.  <item key="title">random test</item>

05.  <item key="value">2880f538686cf239481a70366047a619</item>

06.  </item>

07.- <item key="bbb">

08.  <item key="title">fixed test</item>

09.  <item key="value">2010-01-01</item>

10.  </item>

11.  <item key="ccc">this is c</item>

12.- <item key="ddd">

13.- <item key="0">

14.  <item key="0">1268222560</item>

15.  </item>

16.- <item key="1">

17.  <item key="0">1268222560</item>

18.  </item>

19.- <item key="2">

20.  <item key="0">1268222560</item>

21.  </item>

22.- <item key="3">

23.  <item key="0">1268222560</item>

24.  </item>

25.  </item>

26.  </root>

2. xml转换为array

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01.<?php

02.$array = array(

03.    'aaa' => array(

04.        'title' => 'random test',

05.        'value' => md5(microtime())

06.    ),

07.    'bbb' => array(

08.        'title' => 'fixed test',

09.        'value' => '2010-01-01'

10.    ),

11.    'ccc' => 'this is c',

12.    'ddd' => array(

13.        array(

14.            time()

15.        ),

16.        array(

17.            time()

18.        ),

19.        array(

20.            time()

21.        ),

22.        array(

23.            time()

24.        )

25.    )

26.);

27.  

28./* 使用方法 */

29.$xml = array2xml($array);

30.$array2 = xml2array(getXmlRoot($xml));

31.print_r($array);

32.echo '<br><br>';

33.print_r($array2);

34.exit();

35.?>

运行结果为：

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1.Array ( [aaa] => Array ( [title] => random test [value] => fb5519e565162c6ac69700bb4c4a13c2 ) [bbb] => Array ( [title] => fixed test [value] => 2010-01-01 ) [ccc] => this is c [ddd] => Array ( [0] => Array ( [0] => 1268235843 ) [1] => Array ( [0] => 1268235843 ) [2] => Array ( [0] => 1268235843 ) [3] => Array ( [0] => 1268235843 ) ) ) 

2.  

3.Array ( [aaa] => Array ( [title] => random test [value] => fb5519e565162c6ac69700bb4c4a13c2 ) [bbb] => Array ( [title] => fixed test [value] => 2010-01-01 ) [ccc] => this is c [ddd] => Array ( [0] => Array ( [0] => 1268235843 ) [1] => Array ( [0] => 1268235843 ) [2] => Array ( [0] => 1268235843 ) [3] => Array ( [0] => 1268235843 ) ) )