用PHP编写和读取XML的几种方式_PHP教程
程序员文章站
2022-04-26 18:46:08
...
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 <book><br>$title = $book->appendChild($dom->createElement_x_x ('title')); <br>//add <title> text node element to <title>
<br>$title->appendChild($dom->createTextNode('Great American Novel')); <br>//generate xml <br>$dom->formatOutput = true; // set the formatOutput attribute of domDocument to true <br>//save XML as string or file <br>$test1 = $dom->saveXML(); // put string in test1 <br>$dom -> save('test1.xml'); // save as file <br>?> <br>
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：
$sxe = simplexml_load_string('Great American <br>Novel
if ($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;
$dom->loadXML('Great American <br>Novel
if (!$dom) {
echo 'Error while parsing the document';
exit;
}
$s = simplexml_import_dom($dom);
echo $s->book[0]->title; // Great American Novel
?>
实例一：
复制代码 代码如下:
//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
$book = $books->appendChild($dom->createElement_x_x ('book'));
//add
实例二：
复制代码 代码如下:
$aa = "111";
$xmlstr =
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:
复制代码 代码如下:
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\n";
}
二.使用simple生成和读取xml文件
实例一：
复制代码 代码如下:
$xmlstr =
Cliff meets Lovely Woman. Loyal Dog sleeps, but wakes up to bark
at mailman.
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：
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:
$sxe = simplexml_load_string('
if ($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:
$dom = new domDocument;
$dom->loadXML('
if (!$dom) {
echo 'Error while parsing the document';
exit;
}
$s = simplexml_import_dom($dom);
echo $s->book[0]->title; // Great American Novel
?>
上一篇： Python中的高级编程一些小技巧总结