php解析xml方法实例详解

本文以实例形式详细讲述了php解析xml方法。分享给大家供大家参考。具体分析如下：

books.xml文件如下：

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <bookstore>
     <book category="children">
     <title lang="en">Harry Potter</title>
     <author>J K. Rowling</author>
     <year>2005</year>
     <price>29.99</price>
     </book>
     <book category="cooking">
     <title lang="en">Everyday Italian</title>
     <author>Giada De Laurentiis</author>
     <year>2005</year>
     <price>30.00</price>
     </book>
     <book category="web" cover="paperback">
     <title lang="en">Learning XML</title>
     <author>Erik T. Ray</author>
     <year>2003</year>
     <price>39.95</price>
     </book>
    </bookstore>

1、DOM解析XML

    <?php
     //创建一个DOMDocument对象
     $doc=new DOMDocument();
     //加载XML文件
     $doc->load("books.xml");
     //获取所有的book标签
     $bookDom=$doc->getElementsByTagName("book");
     foreach($bookDom as $book){
      $title = $book->getElementsByTagName("title")->item(0)->nodeValue;
      $author = $book->getElementsByTagName("author")->item(0)->nodeValue;
      $year = $book->getElementsByTagName("year")->item(0)->nodeValue;
      $price = $book->getElementsByTagName("price")->item(0)->nodeValue;
      echo "title：".$title."<br>";
      echo "author：".$author."<br>";
      echo "year：".$year."<br>";
      echo "price：".$price ."<br>";
      echo "***********************************<br>";
     }
    ?>

2、xml_parse_into_struct

创建解析器，将xml数据解析到数组，释放解析器，再有就是从数组中提取想要的值。

    <?php
     // 读取xml文件
     $file = "books.xml";
     $data = file_get_contents($file);
     // 创建解析器
     $parser = xml_parser_create();
     // 将 XML 数据解析到数组中
     xml_parse_into_struct($parser, $data, $vals, $index);
     // 释放解析器
     xml_parser_free($parser);
     // 数组处理
     $arr = array();
     $t=0;
     foreach($vals as $value) {
     $type = $value['type'];
     $tag = $value['tag'];
     $level = $value['level'];
     $attributes = isset($value['attributes'])?$value['attributes']:"";
     $val = isset($value['value'])?$value['value']:"";
     switch ($type) {
      case 'open':
      if ($attributes != "" || $val != "") {
       $arr[$t]['tag'] = $tag;
       $arr[$t]['attributes'] = $attributes;
       $arr[$t]['level'] = $level;
       $t++;
      } 
      break;
      case "complete":
      if ($attributes != "" || $val != "") {
       $arr[$t]['tag'] = $tag;
       $arr[$t]['attributes'] = $attributes;
       $arr[$t]['val'] = $val;
       $arr[$t]['level'] = $level;
       $t++;
      } 
      break;
     } 
     } 
     echo "<pre>";
     print_r($arr);
     echo "</pre>";
    ?>

3、用 SAX 解析器读取 XML-----XML Simple API（SAX）解析器

    <?php
     $file="books.xml";
     $xml = simplexml_load_file($file);
     echo "<pre>";
     print_r($xml);
     echo "</pre>";
    ?>

希望本文所述对大家的php程序设计有所帮助。