PHP SimpleXML – 获取节点/属性值
SimpleXML 是一个 PHP 扩展，它允许我们轻松地操作和获取 XML 数据。
PHP SimpleXML - 获取节点值
从 "note.xml" 文件获取节点值：
实例
<?php
$xml=simplexml_load_file("note.xml") or die("Error: Cannot create object");
echo $xml->to . "<br>";
echo $xml->from . "<br>";
echo $xml->heading . "<br>";
echo $xml->body;
?>
运行实例 »
$xml=simplexml_load_file("note.xml") or die("Error: Cannot create object");
echo $xml->to . "<br>";
echo $xml->from . "<br>";
echo $xml->heading . "<br>";
echo $xml->body;
?>
上述代码的输出为：
Tove
Jani
Reminder
Don't forget me this weekend!
Jani
Reminder
Don't forget me this weekend!
另一个 XML 文件
假设我们有一个名为 "books.xml" 的 XML 文件，如下所示：
<?xml version="1.0" encoding="utf-8"?>
<bookstore>
<book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="WEB">
<title lang="en-us">XQuery Kick Start</title>
<author>James McGovern</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="WEB">
<title lang="en-us">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>
<bookstore>
<book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="WEB">
<title lang="en-us">XQuery Kick Start</title>
<author>James McGovern</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="WEB">
<title lang="en-us">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>
PHP SimpleXML - 获取特定元素的节点值
以下示例获取 "books.xml" 文件中第一个和第二个 <book> 元素中 <title> 元素的节点值：
实例
<?php
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
echo $xml->book[0]->title . "<br>";
echo $xml->book[1]->title;
?>
运行实例 »
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
echo $xml->book[0]->title . "<br>";
echo $xml->book[1]->title;
?>
上述代码的输出为：
Everyday Italian
Harry Potter
Harry Potter
PHP SimpleXML - 获取节点值 - 循环
以下示例循环遍历"books.xml"文件中的所有 <book> 元素，并获取 <title>, <author>, <year>, 和 <price> 元素的节点值：
实例
<?php
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
foreach($xml->children() as $books) {
echo $books->title . ", ";
echo $books->author . ", ";
echo $books->year . ", ";
echo $books->price . "<br>";
}
?>
运行实例 »
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
foreach($xml->children() as $books) {
echo $books->title . ", ";
echo $books->author . ", ";
echo $books->year . ", ";
echo $books->price . "<br>";
}
?>
上述代码的输出为：
Everyday Italian, Giada De Laurentiis, 2005, 30.00
Harry Potter, J K. Rowling, 2005, 29.99
XQuery Kick Start, James McGovern, 2003, 49.99
Learning XML, Erik T. Ray, 2003, 39.95
Harry Potter, J K. Rowling, 2005, 29.99
XQuery Kick Start, James McGovern, 2003, 49.99
Learning XML, Erik T. Ray, 2003, 39.95
PHP SimpleXML - 获取属性值
以下示例获取第一个 <book> 元素的 "category" 属性的属性值和第二个 <book> 元素的 <title> 元素的 "lang" 属性的属性值：
实例
<?php
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
echo $xml->book[0]['category'] . "<br>";
echo $xml->book[1]->title['lang'];
?>
运行实例 »
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
echo $xml->book[0]['category'] . "<br>";
echo $xml->book[1]->title['lang'];
?>
上述代码的输出为：
COOKING
en
en
PHP SimpleXML - 获取属性值-循环
以下示例获取 "books.xml" 文件中 <title> 元素的属性值：
实例
<?php
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
foreach($xml->children() as $books) {
echo $books->title['lang'];
echo "<br>";
}
?>
运行实例 »
$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");
foreach($xml->children() as $books) {
echo $books->title['lang'];
echo "<br>";
}
?>
上述代码的输出为：
en
en
en-us
en-us
en
en-us
en-us
更多 PHP SimpleXML
有关PHP SimpleXML 函数的更多信息，请访问我们的 PHP SimpleXML 参考手册。
