探讨如何使用SimpleXML函数来加载和解析XML文档

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大量SmipleXML函数可用来加载和解析大量XML文档。
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1.simpleXML_load_file()函数来加载指定的XML文件到对象。如果加载文件时遇到问题，则返回FLASE。例：
book.xml文件：
复制代码 代码如下:
<?xml version="1.0" standalone="yes"?>
<library>
<book>
<title>Pride and Prejudice</title>
<author gender="female">Jane Austen</author>
<description>Jane Austen''s most popular work.</description>
</book>
<book>
<title>The Conformist</title>
<author gender="male">Alberto Moravia</author>
<description>Alberto Moravia''s classic psyhcological novel.</description>
</book>
<book>
<title>The Sun Also Rises</title>
<author gender="male">Ernest Hemingway</author>
<description>The masterpiece that launched Hemingway''s career.</description>
</book>
</library>

php文件：
复制代码 代码如下:
<?php
$xml=simplexml_load_file("book.xml");echo "<pre>";
var_dump($xml);
?>

输出结果：
复制代码 代码如下:
object(SimpleXMLElement)#1 (1) {
["book"]=>
array(3) {
[0]=>
object(SimpleXMLElement)#2 (3) {
["title"]=>
string(19) "Pride and Prejudice"
["author"]=>
string(11) "Jane Austen"
["description"]=>
string(32) "Jane Austen''s most popular work."
}
=>
object(SimpleXMLElement)#3 (3) {
["title"]=>
string(14) "The Conformist"
["author"]=>
string(15) "Alberto Moravia"
["description"]=>
string(46) "Alberto Moravia''s classic psyhcological novel."
}
=>
object(SimpleXMLElement)#4 (3) {
["title"]=>
string(18) "The Sun Also Rises"
["author"]=>
string(16) "Ernest Hemingway"
["description"]=>
string(49) "The masterpiece that launched Hemingway''s career."
}
}
}