ZH奶酪：PHP 使用DOMDocument抓取网页

原文链接:http://blog.csdn.net/xyzhaopeng/article/details/6626340

从一个HTML页面的一个表格中提取数据并且将这个数据整理出来加入到MySQL数据库中。

假设目标HTML中我感兴趣的Table有3列，分别是ID，Name，内容。

index.php

<pre class="php" name="code"><?php  

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
    $urlTarget = "http://www.xxxx.com/targethtmlpage.html";  

    require_once('ContentManager.php');  

    //建立Dom对象，分析HTML文件；
    $htmDoc = new DOMDocument;
    $htmDoc->loadHTMLFile($urlTarget );
    $htmDoc->normalizeDocument();  

    //获得到此文档中每一个Table对象；
    $tables_list = $htmDoc->getElementsByTagName('table');     

    //测试Table Count；
    $tables_count = $tables_list->length;
    foreach ($tables_list as $table)
    {
        //得到Table对象的class属性
        $tableProp = $table->getAttribute('class');
        if ($tableProp == 'target_table_class')
        {
            $contentMgr = new ContentManager();
            $contentMgr->ParseFromDOMElement($table);  

            //这里myParser就完成了分析动作。然后就可以进行需要的操作了。
            //比如写入MySQL。
            $contentMgr->SerializeToDB();
        }
    }
?>
</pre><br> 

ContentManager.php

    <?php  

    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */  

    /**
     * Description of ContentParser
     *
     * @author xxxxx
     */
    require_once('ContentInfo.php');
    class ContentManager {
        //put your code here
        var $ContentList;
        public function __construct() {
            $this->ContentList = new ArrayObject();
        }  

        public function ParseFromDOMElement(DOMElement $table)
        {
            $rows_list = $fundsTable->getElementsByTagName('tr');
            $rows_length = $rows_list->length;
            $index = 0;  

            foreach ($rows_list as $row)
            {
                $contentInfo = new ContentInfo();
                $contentInfo->ParseFromDOMElement($row);
                $this->ContentList->append ($contentInfo);
            }  

            //test how many contents parsed.
            $count = $this->fundsInfoArray->count();
            echo $count;
        }  

        public function SerializeToDB()
        {
            //写入数据库，代码略。
        }
    }  

    ?>  

contentinfo.php

    <?php  

    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */  

    /**
     * Description of ContentInfo
     *
     * @author xxxxx
     */
    class ContentInfo {
        //put your code here
        var $ID;
        var $Name;
        var $Content;
        public function ParseFromDOMElement(DOMElement $row)
        {
            $cells_list = $row->getElementsByTagName('td');
            $cells_length = $row->length;  

            $curCellIdx = 0;
            foreach ($cells_list as $cell)
            {
                switch ($curCellIdx++)
                {
                    case 0:
                        $this->ID = $cell->nodeValue;
                        break;
                    case 1:
                        $this->Name = $cell->nodeValue;
                        break;
                    case 2:
                        $this->Content = $cell->nodeValue;
                        break;
                }
            }
        }
    }  

    ?>