php在做后台服务器的时候，经常会遇到这种情况，需要解析来自前台的xml文件，并将数据以xml格式返回，在这种情况下，xml与php中关联数组的转化是非常频繁的事情。比如flex和其他客户端程序与服务器的交互，经常会使用这种方法。

代码如下:

/**
     *
     * 将简单数组转化为简单的xml
     * @param string $data  要进行转化的数组
     * @param string $tag   要使用的标签
     * @example
     * $arr = array(
        'rtxAccount'=>'aaron','ipAddr'=>'192.168.0.12',
        'conferenceList'=>array('conference'=>
                            array(
                                array('conferenceId'=>1212,'conferenceTitle'=>'quanshi 444','smeAccount'=>'https://www.jb51.net'),
                                array('conferenceId'=>454,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'https://www.jb51.net'),
                                array('conferenceId'=>6767,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'https://www.jb51.net'),
                                array('conferenceId'=>232323,'conferenceTitle'=>'quanshi uuu','smeAccount'=>'https://www.jb51.net'),
                                array('conferenceId'=>8989,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'https://www.jb51.net'),
                                array('conferenceId'=>1234343212,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'https://www.jb51.net')
                                )
                            )
        );
        转化为：
        aaron
        192.168.0.12
       
           
                1212
                quanshi 444
                https://www.jb51.net
           
           
                454
                quanshi meetting
                https://www.jb51.net
           
           
                6767
                quanshi meetting
                https://www.jb51.net
           
           
                232323
                quanshi uuu
                https://www.jb51.net
           
           
                8989
                quanshi meetting
                https://www.jb51.net
           
           
                1234343212
                quanshi meetting
                https://www.jb51.net
           
       
     */
    function array2xml($data,$tag = '')
    {
        $xml = '';

        foreach($data as $key => $value)
        {
            if(is_numeric($key))
            {
                if(is_array($value))
                {
                    $xml .= "<$tag>";
                    $xml .= array2xml($value);
                    $xml .="";
                }
                else
                {
                    $xml .= "<$tag>$value";
                }   
            }
            else
            {
                if(is_array($value))
                {
                    $keys = array_keys($value);
                    if(is_numeric($keys[0]))
                    {
                        $xml .=array2xml($value,$key);
                    }
                    else
                    {
                        $xml .= "<$key>";
                        $xml .=array2xml($value);
                        $xml .= "";
                    }

                }
                else
                {
                    $xml .= "<$key>$value";
                }
            }
        }
        return $xml;
    }            
}

xml2array

复制代码 代码如下:

/**
  *
  * 将简单的xml转化成关联数组
  * @param string $xmlString  xml字符串
  * @example
  *

 IT交流会
 2011-12-19 12:00:00
 andy1111111
 192.168.1.56
 120
 1
 
  
   被邀请人1的RTX账号
   被邀请人1电话号码
  
  
   被邀请人2的RTX账号
   被邀请人2电话号码
  
 

转化之后的关联数组：
Array
(
    [conferenceTitle] => IT交流会
    [startTime] => 2011-12-19 12:00:00
    [rtxAccount] => andy1111111
    [ipAddr] => 192.168.1.56
    [duration] => 120
    [conferenceType] => 1
    [invitees] => Array
        (
            [invitee] => Array
                (
                    [0] => Array
                        (
                            [rtxAccount] => 被邀请人1的RTX账号
                            [tel] => 被邀请人1电话号码
                        )
                    [1] => Array
                        (
                            [rtxAccount] => 被邀请人2的RTX账号
                            [tel] => 被邀请人2电话号码
                        )
                )
        )
)
  */
 function xml2array($xmlString = '')
 {
  $targetArray = array();
  $xmlObject = simplexml_load_string($xmlString);
  $mixArray = (array)$xmlObject;
  foreach($mixArray as $key => $value)
  {
   if(is_string($value))
   {
    $targetArray[$key] = $value;
   }
   if(is_object($value))
   {
    $targetArray[$key] = xml2array($value->asXML());
   }
   if(is_array($value))
   {
    foreach($value as $zkey => $zvalue)
    {
     if(is_numeric($zkey))
     {
      $targetArray[$key][] = xml2array($zvalue->asXML());
     }
     if(is_string($zkey))
     {
      $targetArray[$key][$zkey] = xml2array($zvalue->asXML());
     }
    }
   }
  }
  return $targetArray;

 }