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【PHP】读取XML
作者:mickelfeng / 发布于2013/3/18/ 588

	books.xml文件：

	<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>

	1.DOMDocument方法
	<?php
	$doc = new DOMDocument();
	$doc->load( 'books.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";
	echo "";
	}
	?>

	2.用 SAX 解析器读取 XML

	<?php
	$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( 'books.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']."\n";
	}
	?>

	3.用正则表达式解析 XML

	<?php
	$xml = "";
	$f = fopen( 'books.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]."\n" );
	}
	?>

	4.解析XML到数 组

	<?php
	 $data = "<root><line /><content language=\"gb2312\">简单的XML数据</content></root>";
	 $parser = xml_parser_create(); //创建解析器
	 xml_parse_into_struct($parser, $data, $values, $index); //解析到数组
	 xml_parser_free($parser); //释放资源
	
	 //显示数组结构
	 echo "\n索引数组\n";
	 print_r($index);
	 echo "\n数据数组\n";
	 print_r($values);
	?>

	5.检查XML是否有效

	<?php
	 //创建XML解析器
	 $xml_parser = xml_parser_create();
	
	 //使用大小写折叠来保证能在元素数组中找到这些元素名称
	 xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, true);
	
	 //读取XML文件
	 $xmlfile = "bb.xml";
	 if (!($fp = fopen($xmlfile, "r")))
	 {
	 die("无法读取XML文件$xmlfile");
	 }
	
	 //解析XML文件
	 $has_error = false; //标志位
	 while ($data = fread($fp, 4096))
	 {
	 //循环地读入XML文档，只到文档的EOF，同时停止解析
	 if (!xml_parse($xml_parser, $data, feof($fp)))
	 {
	 $has_error = true;
	 break;
	 }
	 }
	
	 if($has_error)
	 {
	 echo "该XML文档是错误的！";
	
	 //输出错误行，列及其错误信息
	 $error_line = xml_get_current_line_number($xml_parser);
	 $error_row = xml_get_current_column_number($xml_parser);
	 $error_string = xml_error_string(xml_get_error_code($xml_parser));
	
	 $message = sprintf("［第%d行，%d列］：%s",
	 $error_line,
	 $error_row,
	 $error_string);
	 echo $message;
	 }
	 else
	 {
	 echo "该XML文档是结构良好的。";
	 }
	
	 //关闭XML解析器指针，释放资源
	 xml_parser_free($xml_parser);
	?>
	6.可用于精确的读取XML
	test.xml
	<?xml version="1.0" encoding="UTF-8" ?>
	 <SBMP_MO_MESSAGE>
	 <CONNECT_ID>100</CONNECT_ID>
	 <MO_MESSAGE_ID>123456</MO_MESSAGE_ID>
	 <RECEIVE_DATE>20040605</RECEIVE_DATE>
	 <RECEIVE_TIME>153020</RECEIVE_TIME>
	 <GATEWAY_ID>1</GATEWAY_ID>
	 <VALID>1</VALID>
	 <CITY_CODE>010</CITY_CODE>
	 <CITY_NAME>北京</CITY_NAME>
	 <STATE_CODE>010</STATE_CODE>
	 <STATE_NAME>北京</STATE_NAME>
	 <TP_PID>0</TP_PID>
	 <TP_UDHI>0</TP_UDHI>
	 <MSISDN>15933626501</MSISDN>
	 <MESSAGE_TYPE>8</MESSAGE_TYPE>
	 <MESSAGE>5618常年供应苗木，品种有玉兰、黄叶杨等。联系人：张三，电话：1234567890。</MESSAGE>
	 <LONG_CODE>100</LONG_CODE>
	 <SERVICE_CODE>9588</SERVICE_CODE>
	 </SBMP_MO_MESSAGE>
	test.php:
	<?php
	$myData = array();
	$file = file_get_contents("test.xml");
	if(strpos($file, '<?xml') > -1) {
	 try {
	 //加载解析xml
	 $xml = simplexml_load_string($file);
	 if($xml) {
	 //echo $this->result;
	 //获取节点值
	 $CONNECT_ID = $xml->CONNECT_ID;
	 $MO_MESSAGE_ID = $xml->MO_MESSAGE_ID;
	 $RECEIVE_DATE = $xml->RECEIVE_DATE;
	 $RECEIVE_TIME = $xml->RECEIVE_TIME;
	 $GATEWAY_ID = $xml->GATEWAY_ID;
	 $VALID = $xml->VALID;
	 $CITY_CODE = $xml->CITY_CODE;
	 $CITY_NAME = $xml->CITY_NAME;
	 $STATE_CODE = $xml->CITY_CODE;
	 $STATE_NAME = $xml->STATE_NAME;
	 $TP_PID = $xml->TP_PID;
	 $TP_UDHI = $xml->TP_UDHI;
	 $MSISDN = $xml->MSISDN;
	 $MESSAGE_TYPE = $xml->MESSAGE_TYPE;
	 $MESSAGE = $xml->MESSAGE;//短信
	 $LONG_CODE = $xml->LONG_CODE;
	 $SERVICE_CODE = $xml->SERVICE_CODE;
	 preg_match("/(561)\d{1,2}/", $MESSAGE, $code);
	 switch($code[0]) {
	 case 5618 :
	 $myData[message] = $MESSAGE;
	 break;
	 default :
	 $myData[] = '没有短消息。';
	 break;
	 }
	
	 } else {
	 echo "加载xml文件错误。";
	 }
	
	 } catch(exception $e){
	 print_r($e);
	 }
	
	} else {
	 echo "没有该XML文件。";
	}
	
	echo "<pre>";
	print_r($myData);
	echo "<hr>";
	echo $myData[message];
	?>
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