只要解释一下您懂的几个代码就谢谢了.

以下是采集某个网个数据的程序,如果谁能看懂某行代码地话,请帮忙解释一下,另外,如果有更合理的方式地话,就更好了.这个程序采集的原理其实跟网络蜘蛛差不多,只不过我是针对某个具体的网站.我采集的主要是某个游戏下某个服务器的游戏币价格与库存等信息．这个程序正确．
<?php
//包含共用函数库
include_once('Gather_Base.php');final class cherry extends Gather_Base{
    private $homepage='http://***********/pctop.html';／／网站名被我隐去了．
    private $classname='cherry';
    private $encoding='shift-jis';    function __construct($n){
        //调用父类的构造方法,增加两个参数,
        //一个是类名,一个是编码
        parent::Gather_Base($this->classname,$this->encoding,$n);
    }    //得到数据
    function getData(){
        $games=$this->getGames($this->homepage);
        if($games===false)return false;        //每个游戏处理
        foreach($games as $name=>$http){
            $httpSell=$http;
            $this->showGame($name);
            $this->log('Game',$name);            $docSell=$this->get($httpSell);
            if($docSell===false)continue;            $price=$this->getSellPrice($docSell);
            if($price!==false)
                $this->areasSell[$name]=$price;            $httpBuy=$this->getHttp($docSell);
            if(!$httpBuy)continue;            $docBuy=$this->get($httpBuy);
            if($docBuy===false)continue;            $price=$this->getBuyPrice($docBuy);
            if($price!==false)
                $this->areasBuy[$name]=$price;
        }    }    function getHttp($doc){
        $reg='/<div[^>]*><a\s*href\="([^"]*)"[^>]*><img\ssrc\="kaitori(?:\d*)+\.gif"[^>]*><\/a><\/div>/i';
        $matchs=$this->pregMatch($reg,$doc,true);
        if(!$matchs)return false;
        return 'http://cherry-rmt.xux.jp/'.$matchs[1];
    }    function getSellPrice($doc){
        $thisGame=array();        $tbody=$this->getMiddle($doc,'<tbody>','</tbody>');
        $trs=$this->getMiddles($tbody,'<tr>','</tr>');
        $headers=$this->pregMatchAll('/<th[^>]*><font[^>]*>([^<]*)<\/font><\/th>/i',$trs[0]);        //dump($headers);exit;
        for($i=1;$i<count($trs);$i++){
            $tr=$trs[$i];            $name=$this->getMiddle($tr,'alt="','"',true);
            if(!$name)
                $name=$this->getMiddle($tr,'src="','.',true);
            if(!$name)continue;            $this->showArea($name,'sell');            $tds=$this->pregMatchAll('/<td[^>]*><font[^>]*>(\d*)[^<]*<\/font><\/td>/i',$tr);            $thisGame[$name]=array(
                'areaName'=>$name,
                'basePrice'=>$tds[0][1],
                'stock'=>$tds[count($tds)-1][1],
                'favor'=>array()
            );            for($j=1;$j<count($headers)-1;$j++){
                $favorStock=intval($headers[$j][1]);
                $favorPrice=$tds[$j -1][1];
                $thisGame[$name]['favor'][$favorStock]=$favorPrice;
            }
        }
        return $thisGame;
    }    function getBuyPrice($doc){
        $thisGame=array();        $tbody=$this->getMiddle($doc,'<tbody>','</tbody>');
        $trs=$this->getMiddles($tbody,'<tr>','</tr>');        for($i=1;$i<count($trs);$i++){
            $tr=$trs[$i];
            $name=$this->getMiddle($tr,'alt="','"',true);
            if(!$name)
                $name=$this->getMiddle($tr,'src="','.',true);
            if(!$name)continue;
            $this->showArea($name,'buy');            $tds=$this->pregMatch('/<td[^>]*><font[^>]*>(\d*)[^<]*<\/font><\/td>/i',$tr);            $thisGame[$name]=array(
                'areaName'=>$name,
                'basePrice'=>0,
                'stock'=>intval($tds[1])
            );
        }
        //dump($thisGame);
        return $thisGame;
    }