XML DOM 的实例代码

// 用 DOM 读取 XML
$doc = new DOMDocument();
$doc->load(‘test.xml’);

$books = $doc->getElementsByTagName(“book”);

foreach( $books as $book ){
$authors = $book->getElementsByTagName(“author”);
$author = $authors->item(0)->nodeValue; // nodeValue属 性可根据节点的类型来设置或返回某个节点的值。

$publishers = $book->getElementsByTagName(“publisher”);
$publisher = $publishers->item(0)->nodeValue;

$titles = $book->getElementsByTagName( ”title” );
$title = $titles->item(0)->nodeValue;

echo ”Title: $title <br> Author: $author <br> Publisher: $publisher<br><hr><br>”;
}

/*

// 用 SAX 解析器读取 XML

$g_books = array();
$g_elem = null;

function startElement( $parser, $name, $attrs ){
global $g_books, $g_elem;
if ( $name == ’BOOK’ ) $g_books []= array();
$g_elem = $name;
}

function endElement( $parser, $name ){
global $g_elem;
$g_elem = null;
}

function textData( $parser, $text ){
global $g_books, $g_elem;
if ( $g_elem == ’AUTHOR’ || $g_elem == ’PUBLISHER’ || $g_elem == ’TITLE’ ){
$g_books[ count( $g_books ) - 1 ][ $g_elem ] = $text;
}
}

$parser = xml_parser_create();

xml_set_element_handler( $parser, ”startElement”, ”endElement” );
xml_set_character_data_handler( $parser, ”textData” );

$f = fopen( ’test.xml’, ’r' );

while( $data = fread( $f, 4096 ) ){
xml_parse( $parser, $data );
}

xml_parser_free( $parser );

foreach( $g_books as $book ){
echo $book['TITLE'].” - ”.$book['AUTHOR'].” - ”;
echo $book['PUBLISHER'].””;
}

$xml = ”";
$f = fopen( ’test.xml’, ’r' );
while( $data = fread( $f, 4096 ) ) { $xml .= $data; }
fclose( $f );

preg_match_all( ”/<book>(.*?)</book>/s”, $xml, $bookblocks );

foreach( $bookblocks[1] as $block ){
preg_match_all( ”/<author>(.*?)</author>/”, $block, $author );
preg_match_all( ”/<title>(.*?)</title>/”, $block, $title );
preg_match_all( ”/<publisher>(.*?)</publisher>/”, $block, $publisher );
echo( $title[1][0].” - ”.$author[1][0].” - ”. $publisher[1][0].”” );
}

/*

// 用 DOM 编写 XML

$books = array();
$books [] = array(
’title’ => ’PHP Hacks’,
’author’ => ’Jack Herrington’,
’publisher’ => ”O’Reilly”
);
$books [] = array(
’title’ => ’Podcasting Hacks’,
’author’ => ’Jack Herrington’,
’publisher’ => ”O’Reilly”
);

$doc = new DOMDocument();
$doc->formatOutput = true;

$r = $doc->createElement( ”books” );
$doc->appendChild( $r );

foreach( $books as $book ){
$b = $doc->createElement( ”book” );

$author = $doc->createElement( ”author” );
$author->appendChild( $doc->createTextNode( $book['author'] ) );

$b->appendChild( $author );

$title = $doc->createElement( ”title” );
$title->appendChild( $doc->createTextNode( $book['title'] ) );

$b->appendChild( $title );

$publisher = $doc->createElement( ”publisher” );
$publisher->appendChild( $doc->createTextNode( $book['publisher'] ) );

$b->appendChild( $publisher );
$r->appendChild( $b );
}

//echo $doc->saveXML();

/*

<?php

PHP 编写xml

$books = array();
$books [] = array(
’title’ => ’PHP Hacks’,
’author’ => ’Jack Herrington’,
’publisher’ => ”O’Reilly”
);
$books [] = array(
’title’ => ’Podcasting Hacks’,
’author’ => ’Jack Herrington’,
’publisher’ => ”O’Reilly”
);
?>

<books>
<?php
foreach( $books as $book )
{
?>
<book>
<title><?php echo( $book['title'] ); ?></title>
<author><?php echo( $book['author'] ); ?>
</author>
<publisher><?php echo( $book['publisher'] ); ?>
</publisher>
</book>
<?php
}
?>
</books>

实例中用到的 test.xml 如下：

<?xml version=”1.0″ encoding=”utf8″?>
<books>
<book>
<author>Jack Herrington</author>
<title>PHP Hacks - liehuo.net</title>
<publisher>O’Reilly</publisher>
</book>

<book>
<author>Jack Herrington</author>
<title>Podcasting Hacks</title>
<publisher>O’Reilly</publisher>
</book>
</books>