array2xml和xml2array，xml与array的互相转化

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。下面是我归纳的两个方法，大大简化了xml与数组相互转化的工作量。

/**     *     * 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'=>'[e-mail]'),                                array('conferenceId'=>454,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'[e-mail]'),                                array('conferenceId'=>6767,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'[e-mail]'),                                array('conferenceId'=>232323,'conferenceTitle'=>'quanshi uuu','smeAccount'=>'[e-mail]'),                                array('conferenceId'=>8989,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'[e-mail]'),                                array('conferenceId'=>1234343212,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'[e-mail]')                                )                            )                                                );        转化为：        <rtxAccount>aaron</rtxAccount>        <ipAddr>192.168.0.12</ipAddr>        <conferenceList>            <conference>                <conferenceId>1212</conferenceId>                <conferenceTitle>quanshi 444</conferenceTitle>                <smeAccount>[e-mail]</smeAccount>            </conference>            <conference>                <conferenceId>454</conferenceId>                <conferenceTitle>quanshi meetting</conferenceTitle>                <smeAccount>[e-mail]</smeAccount>            </conference>            <conference>                <conferenceId>6767</conferenceId>                <conferenceTitle>quanshi meetting</conferenceTitle>                <smeAccount>[e-mail]</smeAccount>            </conference>            <conference>                <conferenceId>232323</conferenceId>                <conferenceTitle>quanshi uuu</conferenceTitle>                <smeAccount>[e-mail]</smeAccount>            </conference>            <conference>                <conferenceId>8989</conferenceId>                <conferenceTitle>quanshi meetting</conferenceTitle>                <smeAccount>[e-mail]</smeAccount>            </conference>            <conference>                <conferenceId>1234343212</conferenceId>                <conferenceTitle>quanshi meetting</conferenceTitle>                <smeAccount>[e-mail]</smeAccount>            </conference>        </conferenceList>     */    function array2xml($data,$tag = '')    {        $xml = '';                foreach($data as $key => $value)        {            if(is_numeric($key))            {                if(is_array($value))                {                    $xml .= "<$tag>";                    $xml .= array2xml($value);                    $xml .="</$tag>";                }                else                {                    $xml .= "<$tag>$value</$tag>";                }                }            else            {                if(is_array($value))                {                    $keys = array_keys($value);                    if(is_numeric($keys[0]))                    {                        $xml .=array2xml($value,$key);                    }                    else                    {                        $xml .= "<$key>";                        $xml .=array2xml($value);                        $xml .= "</$key>";                    }                                    }                else                {                    $xml .= "<$key>$value</$key>";                }            }        }        return $xml;    }             }

xml2array

/** *  * 将简单的xml转化成关联数组 * @param string $xmlString  xml字符串 * @example * <?xml version="1.0" encoding="UTF-8" standalone="yes"?><RTXConferenceReqDTO><conferenceTitle>IT交流会</conferenceTitle><startTime>2011-12-19 12:00:00</startTime><rtxAccount>andy1111111</rtxAccount><ipAddr>192.168.1.56</ipAddr><duration>120</duration><conferenceType>1</conferenceType><invitees><invitee><rtxAccount>被邀请人1的RTX账号</rtxAccount><tel>被邀请人1电话号码</tel></invitee><invitee><rtxAccount>被邀请人2的RTX账号</rtxAccount><tel>被邀请人2电话号码</tel></invitee></invitees></RTXConferenceReqDTO>转化之后的关联数组：Array(    [conferenceTitle] => IT交流会    [startTime] => 2011-12-19 12:00:00    [rtxAccount] => andy1111111    [ipAddr] => 192.168.1.56    [duration] => 120    [conferenceType] => 1    [invitees] => Array        (            [invitee] => Array                (                    [0] => Array                        (                            [rtxAccount] => 被邀请人1的RTX账号                            [tel] => 被邀请人1电话号码                        )                    [1] => Array                        (                            [rtxAccount] => 被邀请人2的RTX账号                            [tel] => 被邀请人2电话号码                        )                )        )) */function xml2array($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;}