php读取xml列表程序

php读了xml很方便的,我们下面用dom与php自带的xml_parser来实例吧,我们先看看wk.xml 文件,其实这里是blogbus的rss文件,代码如下:

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<?xml version="1.0" encoding="gb2312"
    <rss version="2.0">
     <channel>
      <title>mikeowen</title>
      <link>http://mikeowen.blogbus.com</link>
      <description><![CDATA[Design]]></description>
      <generator> by blogbus.com </generator>
      <lastBuildDate>Tue, 30 Jan 2007 13:46:52 +0800</lastBuildDate>
      <image>
             <url>http://public.blogbus.com/images/head.gif</url>
             <title>mikeowen</title>
             <link>http://mikeowen.blogbus.com</link>
            </image>
    <item>
       <title>vanke</title>
       <description>tff</description>
       <link>http://mikeowen.blogbus.com/logs/28560579.html</link>
       <author>mikeowen</author>
       <pubDate>Fri, 05 Sep 2008 12:41:22 +0800</pubDate>
      </item>
      <item>
       <title>something3</title>
       <description>eee</description>
       <link>http://mikeowen.blogbus.com/logs/23972142.html</link>
       <author>mikeowen</author>
       <pubDate>Wed, 02 Jul 2008 12:26:40 +0800</pubDate>
      </item>
     </channel>
    </rss>

这是我一个同事的博客rss文件我取下来作实例了吧,下面我们来看看解析xml的方法用dom来做,实例代码如下:

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<?php
      $doc = new DOMDocument();
      $doc->load( 'wk.xml' );

      $books = $doc->getElementsByTagName( "item" );
      foreach( $books as $book )
      {
      $authors = $book->getElementsByTagName( "title" );
      $author = $authors->item(0)->nodeValue;

      $publishers = $book->getElementsByTagName( "link" );
      $publisher = $publishers->item(0)->nodeValue;

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

      echo "$title - $author - $publishern";
      }
    //开源代码phprm.com

简单吧,直接读取节点然后再取当前第一个节点的值就行了,好了下面我们再看看一种方法用php自然的,代码如下:

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<?php
      $g_books = array();
      $g_elem = null;

      function startElement( $parser, $name, $attrs )
      {
      global $g_books, $g_elem;
      if ( $name == 'item' ) $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 == 'link' ||
      $g_elem == 'pubDate' ||
      $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( 'wk.xml', 'r' );

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

      xml_parser_free( $parser );

      foreach( $g_books as $book )
      {
      echo $book['title']." - ".$book['link']." - ";
      echo $book['pubDate']."n";
      }

这种代码多一点,单效率要比上面那个高很多的.

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