example.xml文件：
<?php
$xml = simplexml_load_file('example.xml'); //创建SimpleXML对象
print_r($xml); //输出XML
?>
<?xml version='1.0'?>
<departs>
<depart>
<name>production support</name>
<employees>
<employee>
<serial_no>100001</serial_no>
<name>Simon</name>
<age>24</age>
<birthday>1982-11-06</birthday>
<salary>5000.00</salary>
<bonus>1000.00</bonus>
</employee>
<employee>
<serial_no>100002</serial_no>
<name>Elaine</name>
<age>24</age>
<birthday>1982-01-01</birthday>
<salary>6000.00</salary>
<bonus>2000.00</bonus>
</employee>
</employees>
</depart>
<depart>
<name>testing center</name>
<employees>
<employee>
<serial_no>110001</serial_no>
<name>Helen</name>
<age>23</age>
<birthday>1983-07-21</birthday>
<salary>5000.00</salary>
<bonus>1000.00</bonus>
</employee>
</employees>
</depart>
</departs>
<?php
$xml = simplexml_load_file('example.xml'); //创建SimpleXML对象
var_dump($xml); //输出XML
?>
<?php
$xml = simplexml_load_file('example.xml'); //读取XML文件
foreach($xml->depart as $a) //循环读取XML数据中的每一个depart标签
{
echo "$a->name <BR>"; //输出其中的name属性
}
?>
<?php
$xml = simplexml_load_file('example.xml'); //读取XML文件
echo $xml->depart->name[0]; //输出节点
?>
<?php
$xml = simplexml_load_file('example.xml');
foreach ($xml->depart->children() as $depart) //循环读取depart标签下的子标签
{
var_dump($depart); //输出标签的XML数据
}
?>
<?php
$xml = simplexml_load_file('example.xml'); //读取XML文件
$result = $xml->xpath('/departs/depart/employees/employee/name'); //定义节点
var_dump($result); //输出节点
?>
<?php
$xml = simplexml_load_file('example.xml'); //读取XML
$xml->depart->name[0] = "Human Resource"; //修改节点
?>
<?php
$xml = simplexml_load_file('example.xml'); //读取XML数据
echo $xml->asXML(); //标准化XML数据
?>
<?php
$xml = simplexml_load_file('example.xml'); //读取XML数据
$newxml = $xml->asXML(); //标准化XML数据
$fp = fopen("newxml.xml", "w"); //打开要写入XML数据的文件
fwrite($fp, $newxml); //写入XML数据
fclose($fp); //关闭文件
?>