一.使用DOM生成和读取XML文件

实例一：

//Creates XML string and XML document using the DOM

$dom = new DomDocument('1.0');

//add root -

$books = $dom->appendChild($dom->createElement_x_x ('books'));

//add element to

$book = $books->appendChild($dom->createElement_x_x ('book'));

//add

element to

$title = $book->appendChild($dom->createElement_x_x ('title'));

//add

text node element to

$title->appendChild($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：

$aa = "111";

$xmlstr = <<{$aa}

Joe

Jane

I know that's the answer -- but what's the question?

XML;

$dom = new domDocument;

$dom->loadXML($xmlstr);

$test1 = $dom->saveXML();

$dom->save('test1.xml');

实例三：

test1.xml:

Jack Herrington

PHP Hacks

O'Reilly

Jack Herrington

Podcasting Hacks

O'Reilly

example.php:

$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\n";

}

二.使用simple生成和读取xml文件

实例一：

$xmlstr = <<Great American Novel

Cliff

really great guy

Lovely Woman

matchless beauty

Loyal Dog

sleepy

Cliff meets Lovely Woman. Loyal Dog sleeps, but wakes up to bark

at mailman.

4

9

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
';

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：

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：

$sxe = simplexml_load_string('Great American

Novel

');

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：

$dom = new domDocument;

$dom->loadXML('Great American

Novel');

if (!$dom) {

echo 'Error while parsing the document';

exit;

}

$s = simplexml_import_dom($dom);

echo $s->book[0]->title; // Great American Novel

?>