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独自のXMLハンドラを使用して解析１

概要

独自のハンドラを使用して解析


サンプル

XML

<?xml version="1.0" encoding="utf-8"?>
<library>
	<book>
		<title>Programming PHP</title>
		<authors>
			<author>Rasmus Lerdorf</author>
			<author>Kevin Tatroe</author>
			<author>Peter MacIntyre</author>
		</authors>
		<isbn>1-56592-610-1</isbn>
		<comment>すばらしい本です！</comment>
	</book>
	<book>
		<title>PHP Pocket Reference</title>
		<authors>
			<author>Rasmus Lerdorf</author>
		</authors>
		<isbn>1-56592-769-9</isbn>
		<comment>ほんとにポケットにはいっちゃいます</comment>
	</book>
	<book>
		<title>Perl Cookbook</title>
		<authors>
			<author>Tom Christiansen</author>
			<author>Nathan Torkington</author>
		</authors>
		<isbn>1-56592-243-3</isbn>
		<comment>役に立つテクニックが満載されています．
			Perl だけじゃなく PHP でも応用できるでしょう．
		</comment>
	</book>
</library>
 
 

PHP

<html>
	<head><title>私の書庫</title></head>
	<body>
 
<?php
class BookList {
 
	private $parser;
	private $record;
	private $current_field = '';
	private $field_type;
	private $ends_record;
	private $recotds;
 
	function  __construct($filename) {
		$this->parser = xml_parser_create();
		xml_set_object($this->parser, $this);
		xml_set_element_handler($this->parser, 'start_element', 'end_element');
		xml_set_character_data_handler($this->parser, 'cdata');
 
		// 1 = 単一のフィールド，2 = 配列型のフィールド，3 = レコードのコンテナ
		$this->field_type = array(
								'library' => 0,
								'title' => 1,
								'author' => 2,
								'isbn' => 1,
								'comment' => 1,
								'book' => 3,
								'authors' => 3);
		$this->ends_record = array('book' => 'true');
 
		$x = join("", file($filename));
		xml_parse($this->parser, $x);
		xml_parser_free($this->parser);
	}
 
	function start_element ($p, $element, &$attributes) {
		$element = strtolower($element);
		if ($this->field_type[$element] != 0) {
			$this->current_field = $element;
		}else{
			$this->current_field = '';
		}
	}
 
	function end_element ($p, $element) {
		$element = strtolower($element);
		if (isset($this->ends_record[$element])) {
			$this->records[] = $this->record;
			$this->record = array();
		}
		$this->current_field = '';
	}
 
	function cdata ($p, $text) {
		if($this->current_field != ""){
			if ($this->field_type[$this->current_field] === 2) {
				$this->record[$this->current_field][] = $text;
			} elseif ($this->field_type[$this->current_field] === 1){
				if(isset($this->record[$this->current_field])){
					$this->record[$this->current_field] .= $text;
				}else{
					$this->record[$this->current_field] = $text;
				}
			}
		}
	}
 
	function show_menu() { 
		echo "<table border=1>\n";
 
		foreach ($this->records as $book) {
			echo "<tr>";
			$authors = join(', ', $book['author']);
			printf("<th><a href='%s'>%s</a></th><td>%s</td></tr>\n",
			$_SERVER['PHP_SELF'] . '?isbn=' . $book['isbn'],
			$book['title'],
			$authors);
			echo "</tr>\n";
		}
	}
 
	function show_book ($isbn) {
		foreach ($this->records as $book) {
			if ($book['isbn'] !== $isbn) {
				continue;
			}
 
			$authors = join(', ', $book['author']);
			printf("<b>%s</b> by %s.<br>", $book['title'], $authors);
			printf("ISBN: %s<br>", $book['isbn']);
			printf("コメント: %s<p>\n", $book['comment']);
		}
?>
<a href="<?php echo $_SERVER['PHP_SELF'] ?>">一覧</a>に戻る<p>
<?php
	}
}
?>
 
<?php
	// 
	$my_library = new BookList("sample07_1.xml");
	if (isset($_GET['isbn']) && $_GET['isbn'] != "") {
		// 詳細情報を返します．
		$my_library->show_book($_GET['isbn']);
	} else {
		// メニューを返します
		$my_library->show_menu();
	}
?>
	</body>
</html>
 
 

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最終更新：2012年08月23日 22:35