PHP数组与XML之间的转换
在开发中,我们经常会遇到数组与XML之间的互相转换,尤其在处理接口开发的时候经常用到,比如对方客户端POST一个XML格式的数据到服务器上,服务器上的程序要负责接收解析,还有需要将数据表数据以XML格式提供给第三方等等应用。
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本文我们将简单介绍如何使用PHP处理数组和XML之间的互相转换。
PHP将数组转换成XML
PHP可以将数组转换成xml格式,简单的办法是遍历数组,然后将数组的key/value转换成xml节点,再直接echo输出了,如:
function arrayToXml($arr){ $xml = "<root>"; foreach ($arr as $key=>$val){ if(is_array($val)){ $xml.="<".$key.">".arrayToXml($val)."</".$key.">"; }else{ $xml.="<".$key.">".$val."</".$key.">"; } } $xml.="</root>"; return $xml;}
我测试了下,这个最简单,速度又快,支持多为数组,中文也不会乱码。
另一种方法是利用DOMDocument来生成xml结构:
function arrayToXml($arr,$dom=0,$item=0){ if (!$dom){ $dom = new DOMDocument("1.0"); } if(!$item){ $item = $dom->createElement("root"); $dom->appendChild($item); } foreach ($arr as $key=>$val){ $itemx = $dom->createElement(is_string($key)?$key:"item"); $item->appendChild($itemx); if (!is_array($val)){ $text = $dom->createTextNode($val); $itemx->appendChild($text); }else { arrayToXml($val,$dom,$itemx); } } return $dom->saveXML();}
它同样可以将数组转换成xml,而且支持多维数组,生成的xml中文也不会乱码。
PHP将XML转换成数组
做接口开发的时候经常会碰到别人提交给你的是xml格式的数据,常见的微信接口、支付宝接口等,他们的接口如发送消息通信都是xml格式的,那么我们先想办法拿到这个xml数据,然后再将其转化成数组。
假设我们获取到一个这样的XML:
<root><user>月光光abcd</user><pvs>13002</pvs><ips><baidu_ip>1200</baidu_ip><google_ip>1829</google_ip></ips><date>2016-06-01</date></root>
通过simplexml_load_string()解析读取xml数据,然后先转成json格式,再转换成数组。
function xmlToArray($xml){ //禁止引用外部xml实体 libxml_disable_entity_loader(true); $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA); $val = json_decode(json_encode($xmlstring),true); return $val;}
调用xmlToArray()可得到以下结果:
得到数组后,我们就可以对数据进行各种处理了。

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