一.使用DOM生成和读取XML文件
实例一：
复制代码 代码如下:
<?php
//Creates XML string and XML document using the DOM
$dom = new DomDocument("1.0");
//add root - <books>
$books = $dom->appendChild($dom->createElement_x_x ("books"));
//add <book> element to <books>
$book = $books->appendChild($dom->createElement_x_x ("book"));
//add <title> element to <book>
$title = $book->appendChild($dom->createElement_x_x ("title"));
//add <title> text node element to <title>
$title->appendChild($dom->createTextNode("Great American Novel"));
//generate xml
$dom->formatOutput = true; // set the formatOutput attribute of domDocument to true
//save XML as string or file
$test1 = $dom->saveXML(); // put string in test1
$dom -> save("test1.xml"); // save as file
?>
实例二：
复制代码 代码如下:
$aa = "111";
$xmlstr = <<<XML
<?xml version="1.0"?>
<document>
<title>{$aa}</title>
<from>Joe</from>
<to>Jane</to>
<body>
I know that"s the answer -- but what"s the question?
</body>
</document>
XML;
$dom = new domDocument;
$dom->loadXML($xmlstr);
$test1 = $dom->saveXML();
$dom->save("test1.xml");
实例三：
test1.xml:
复制代码 代码如下:
<?xml version="1.0"?>
<books>
<book>
<author>Jack Herrington</author>
<title>PHP Hacks</title>
<publisher>O"Reilly</publisher>
</book>
<book>
<author>Jack Herrington</author>
<title>Podcasting Hacks</title>
<publisher>O"Reilly</publisher>
</book>
</books>
example.php:
复制代码 代码如下:
$doc = new DOMDocument();
$doc->load("test1.xml");
$books = $doc->getElementsByTagName("book");
foreach($books as $book){
$authors = $book->getElementsByTagName("author");
$author = $authors->item(0)->nodeValue;
$publishers = $book->getElementsByTagName( "publisher" );
$publisher = $publishers->item(0)->nodeValue;
$titles = $book->getElementsByTagName( "title" );
$title = $titles->item(0)->nodeValue;
echo "$title - $author - $publisher";
}
二.使用simple生成和读取xml文件
实例一：
复制代码 代码如下:
<?
$xmlstr = <<<XML
<?xml version="1.0" standalone="yes"?>
<books>
<book>
<title>Great American Novel</title>
<characters>
<character>
<name>Cliff</name>
<desc>really great guy</desc>
</character>
<character>
<name>Lovely Woman</name>
<desc>matchless beauty</desc>
</character>
<character>
<name>Loyal Dog</name>
<desc>sleepy</desc>
</character>
</characters>
<plot>
Cliff meets Lovely Woman. Loyal Dog sleeps, but wakes up to bark
at mailman.
</plot>
<success type="bestseller">4</success>
<success type="bookclubs">9</success>
</book>
</books>
XML; //提取节点内容
$xml = new SimpleXMLElement($xmlstr);
foreach ($xml->book[0]->success as $success) {
switch((string) $success["type"]) { // Get attributes as element indices
case "bestseller":
echo $success. " months on bestseller list<br>";
break;
case "bookclubs":
echo $success. " bookclub listings";
break;
}
} //修改文本节点内容
$xml = new SimpleXMLElement($xmlstr);
$xml->book[0]->characters->character[0]->name = "Big Cliff";
echo $xml->asXML(); //添加子元素的文本节点
$xml = new SimpleXMLElement($xmlstr);
$character = $xml->book[0]->characters->addChild("character");
$character->addChild("name", "Yellow Cat");
$character->addChild("desc", "aloof");
$success = $xml->book[0]->addChild("success", "2");
$success->addAttribute("type", "reprints");
echo $xml->asXML(); ?>
实例二：
复制代码 代码如下:
if (file_exists("test1.xml")) { //读取xml文件
$xml = simplexml_load_file("test1.xml");
var_dump(xml);
} else {
exit("Failed to open test1.xml.");
}
三.DOM和simple互操作
DOM导入simpleXML：
复制代码 代码如下:
<?php
$sxe = simplexml_load_string("<books><book><title>Great American
Novel</title></book></books>");
if ($sxe === false) {
echo "Error while parsing the document";
exit;
}
$dom_sxe = dom_import_simplexml($sxe);
if (!$dom_sxe) {
echo "Error while converting XML";
exit;
}
$dom = new DOMDocument("1.0");
$dom_sxe = $dom->importNode($dom_sxe, true);
$dom_sxe = $dom->appendChild($dom_sxe);
$test2 = $dom->saveXML(); // put string in test2
$dom -> save("test2.xml"); // save as file
?>
simpleXML导入DOM：
复制代码 代码如下:
<?php
$dom = new domDocument;
$dom->loadXML("<books><book><title>Great American
Novel</title></book></books>");
if (!$dom) {
echo "Error while parsing the document";
exit;
}
$s = simplexml_import_dom($dom);
echo $s->book[0]->title; // Great American Novel
?>
