An explanation of the php XML file interpretation class

<?php

/** XML 文件分析类

*   Date:   2013-02-01

*   Author: fdipzone

*   Ver:    1.0

*

*   func:

*   loadXmlFile($xmlfile)     读入xml文件输出Array

*   loadXmlString($xmlstring) 读入xmlstring 输出Array

*/

class XMLParser{

    /** 读取xml文件

    * @param  String  $xmlfile

    * @return Array

    */

    public function loadXmlFile($xmlfile){

        // get xmlfile content

        $xmlstring = file_exists($xmlfile)? file_get_contents($xmlfile) : '';

        // parser xml

        list($flag, $data) = $this->parser($xmlstring);

        return $this->response($flag, $data);

    }

    /** 读取xmlstring

    * @param  String $xmlstring

    * @return Array

    */

    public function loadXmlString($xmlstring){

        // parser xml

        list($flag, $data) = $this->parser($xmlstring);

        return $this->response($flag, $data);

    }

    /** 解释xml内容

    * @param   String $xmlstring

    * @return  Array

    */

    private function parser($xmlstring){

        $flag = false;

        $data = array();

        // check xml format

        if($this->checkXmlFormat($xmlstring)){

            $flag = true;

            // xml to object

            $data = simpleXML_load_string($xmlstring, 'SimpleXMLElement', LIBXML_NOCDATA);

            // object to array

            $this->objectToArray($data);

        }

        return array($flag, $data);

    }

    /** 检查xml格式是否正确

    * @param  String $xmlstring

    * @return boolean

    */

    private function checkXmlFormat($xmlstring){

        if($xmlstring==''){

            return false;

        }

        $xml_parser_obj = xml_parser_create();

        if(xml_parse_into_struct($xml_parser_obj, $xmlstring, $vals, $indexs)===1){ // 1:success 0:fail

            return true;

        }else{

            return false;

        }

    }

    /** object 转 Array

    * @param  object $object

    * @return Array

    */

    private function objectToArray(&$object){

        $object = (array)$object;

        foreach($object as $key => $value){

            if($value==''){

                $object[$key] = "";

            }else{

                if(is_object($value) || is_array($value)){

                    $this->objectToArray($value);

                    $object[$key] = $value;

                }

            }

        }

    }

    /** 输出返回

    * @param  boolean $flag true:false

    * @param  Array   $data 转换后的数据

    * @return Array

    */

    private function response($flag=false, $data=array()){

        return array($flag, $data);

    }

}

?>

<?php

require "XMLParser.class.php";

$xmlfile = 'file.xml';

$xmlstring = &#39;<?xml version="1.0" encoding="utf-8"?>

<xmlroot>

<status>1000</status>

<info></info>

<result><id>100</id>

<name>fdipzone</name>

<gender>1</gender>

<age>28</age>

</result>

</xmlroot>&#39;;

echo &#39;<pre class="brush:php;toolbar:false">&#39;;

$xml_parser = new XMLParser();

echo "response xmlfile\r\n";

list($flag, $xmldata) = $xml_parser->loadXmlFile($xmlfile);

if($flag){

print_r($xmldata);

}

echo "response xmlstring\r\n";

list($flag, $xmldata) = $xml_parser->loadXmlString($xmlstring);

if($flag){

print_r($xmldata);

}

echo '