本文实例讲述了php 使用expat方式解析xml文件操作。分享给大家供大家参考，具体如下：
test.xml：
<?xml version="1.0" encoding="UTF-8"?> <notes> <note> <to>George</to> <from>John</from> <heading>Reminder</heading> <body>Don't forget the meeting!</body> </note> <note> <to>George2</to> <from>John2</from> <heading>Reminder2</heading> <body>Don't forget the meeting!2</body> </note> <instances> <instance st="192.168.234.121" /> <instance st="192.168.234.28" /> </instances> </notes>
PHP文件：
<?php
// Initialize the XML parser
$parser = xml_parser_create();
// Function to use at the start of an element
function start($parser, $element_name, $element_attrs)
{
switch ($element_name) {
case "NOTE":
echo "-- Note --<br />";
break;
case "TO":
echo "To: ";
break;
case "FROM":
echo "From: ";
break;
case "HEADING":
echo "Heading: ";
break;
case "BODY":
echo "Message: ";
}
}
// Function to use at the end of an element
function stop($parser, $element_name)
{
echo "<br />";
}
// Function to use when finding character data
function char($parser, $data)
{
echo $data;
}
// Specify element handler
xml_set_element_handler($parser, "start", "stop");
// Specify data handler
xml_set_character_data_handler($parser, "char");
// Open XML file
// $fp = fopen("test.xml", "r");
// Read data
// while ($data = fread($fp, 10)) {
// xml_parse($parser, $data, feof($fp)) or die(sprintf("XML Error: %s at line %d", xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser)));
// }
// fclose($fp);
$data = file_get_contents("test.xml");
xml_parse($parser, $data) or die(sprintf("XML Error: %s at line %d", xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser)));
// Free the XML parser
xml_parser_free($parser);
?>
运行结果：
-- Note --
To: George
From: John
Heading: Reminder
Message: Don't forget the meeting!-- Note --
To: George2
From: John2
Heading: Reminder2
Message: Don't forget the meeting!2
PS：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：
在线XML/JSON互相转换工具：
http://tools.jb51.net/code/xmljson
在线格式化XML/在线压缩XML：
http://tools.jb51.net/code/xmlformat