PHP读取XML格式文件的方法总结

本文实例总结了PHP读取XML格式文件的方法。分享给大家供大家参考，具体如下：

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";echo "<br>";}?>

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"]."";}?>

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]."" );}?>

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 "索引数组";  print_r($index);  echo "数据数组";  print_r($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！<br />";    //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];?>

PS：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：

在线XML/JSON互相转换工具：http://tools.jb51.net/code/xmljson

在线格式化XML/在线压缩XML：http://tools.jb51.net/code/xmlformat

XML在线压缩/格式化工具：http://tools.jb51.net/code/xml_format_compress

XML代码在线格式化美化工具：http://tools.jb51.net/code/xmlcodeformat

更多关于PHP相关内容感兴趣的读者可查看本站专题：《PHP针对XML文件操作技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《PHP错误与异常处理方法总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。