php中使用DOM类读取XML文件

主要功能：php中使用DOM类读取XML文件

设计知识点：

1、XML节点循环读取

2、用iconv()函数实现编码转换，防止中文乱码

holiday.xml文件如下

<?xml version="1.0" encoding="UTF-8"?>
<daysOff-overTime>
    <year>
        <yearName>2012</yearName>
        <holiday>
            <holidayName>元旦</holidayName>
            <daysOff>
                <from>2012-1-1</from>
                <to>2012-1-3</to>
            </daysOff>
            <overTime>
                <day>2011-12-31</day>
            </overTime>
        </holiday>

        <holiday>
            <holidayName>春节</holidayName>
            <daysOff>
                <from>2012-1-22</from>
                <to>2012-1-28</to>
            </daysOff>
            <overTime>
                <day>2012-1-21</day>
                <day>2012-1-29</day>
            </overTime>
        </holiday>

        <holiday>
            <holidayName>清明节</holidayName>
            <daysOff>
                <from>2012-4-2</from>
                <to>2012-4-4</to>
            </daysOff>
            <overTime>
                <day>2012-3-31</day>
                <day>2012-4-1</day>
            </overTime>
        </holiday>

        <holiday>
            <holidayName>劳动节</holidayName>
            <daysOff>
                <from>2012-4-29</from>
                <to>2012-5-1</to>
            </daysOff>
            <overTime>
                <day>2012-4-28</day>
            </overTime>
        </holiday>

        <holiday>
            <holidayName>端午节</holidayName>
            <daysOff>
                <from>2012-6-22</from>
                <to>2012-6-24</to>
            </daysOff>
        <overTime/>
    </holiday>

    <holiday>
        <holidayName>中秋节、国庆节</holidayName>
        <daysOff>
            <from>2012-9-30</from>
            <to>2012-10-7</to>
        </daysOff>
        <overTime>
            <day>2012-9-26</day>
        </overTime>
    </holiday>

    </year>
</daysOff-overTime>

php代码如下：

<?php
//读取xml文件
$xmlDoc = new DOMDocument();
$xmlDoc->load('http://127.0.0.1/holiday.xml');

//获得该xml文件中的所有年份
$years = $xmlDoc->getElementsByTagName("year");

//对每一个年份进行处理
foreach($years as $year){
    
    //获得具体的年份值
    $yearNames = $year->getElementsByTagName("yearName");
    $yearName = $yearNames->item(0)->nodeValue;
    echo $yearName.'年'.'</br>';
    
    //获得该年份下所有的假日
    $holidays = $year->getElementsByTagName("holiday");
    
    //对每一个假日进行处理
    foreach($holidays as $holiday){
        //获得假日名称
        $holidayNames = $holiday->getElementsByTagName("holidayName");
        $holidayName = $holidayNames->item(0)->nodeValue;
        echo iconv('utf-8','gb2312', $holidayName).': '.'</br>';
        
        //获得假日的具体放假日期
        $daysOffs = $holiday->getElementsByTagName("daysOff");
        $daysOff = $daysOffs->item(0);    
        $froms = $daysOff->getElementsByTagName("from");
        $from = $froms->item(0)->nodeValue;
        $tos = $daysOff->getElementsByTagName("to");
        $to = $tos->item(0)->nodeValue;
        echo '假期为：'.$from.' 至 '.$to.'</br>';
        
        //获得针对该假日的调休日期
        $overTimes = $holiday->getElementsByTagName("overTime");
        $overTime = $overTimes->item(0);    
        $days = $overTime->getElementsByTagName("day");    
        //通过判断，有调休日期则显示，没有则不显示
        if($days->length!=0){
            echo '调休日为：';
            foreach($days as $day){
                echo $day->nodeValue.' ';
            }
            echo '</br>';
        }
        echo '</br>';
    }
}
?>

输出显示：

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