利用PHP实现与ASPBanner组件相似的类

<?php
/*******************************************************
作者:吴振亨(Biz)--phpscript
E-mail:wuzhenheng@china.com
web:http://phpscript.osh.com.cn
文件名：AdRotator.class.php3                 
版权声明:                      

如果您使用了本文件，请给作者写一封E-mail   
如有问题欢迎与作者联系
谢谢您的关注!                     
********************************************************/

/*
广告条管理程序
publicmethod
    GetAdvertisement($adfile)

parameters
    Target=
    Width=
    Height=
    Border=
    Redirect=

*/
classAdRotator{
    var$Target="_blank";
    var$Width="460";
    var$Height="60";
    var$Border=0;
    var$Redirect="";
    var$BannerData=array();
    var$RandTemp=1;

functionAdRotator()
    {
    }
/*
public  
返回广告的链接字串
*/
functionGetAdvertisement($adfile)
    {
    if(count($this->BannerData)==0)
        {
        $this->BannerData=$this->ReadAdFile($adfile);
        }
    $AdData=$this->BannerData;

    $uplimited=count($AdData);

    //随机产生一个ID
    srand((double)microtime()*1000000000000000000);
    $id=@rand(1,$uplimited);

        while($this->RandTemp==$id)
               {
            srand((double)microtime()*1000000000000000000);
               //$id=@rand(1,count($AdData));
               $id=@rand(1,$uplimited);
               }
           $this->RandTemp=$id;

       //echo$id;
       //echocount($AdData);
       //echo$AdData[5]["image"];

         
        $LinkString="<ahref="".$this->Redirect;
        $LinkString.="?url=".$AdData[$id]["url"];
        $LinkString.=""Target="".$this->Target;
        $LinkString.=""Title="".$AdData[$id]["title"];
        $LinkString.="">";
        $LinkString.="<imgborder="".$this->Border;
        $LinkString.=""src="".$AdData[$id]["image"];
        $LinkString.=""width="".$this->Width;
        $LinkString.=""height="".$this->Height;
        $LinkString.="">";
        $LinkString.="</a>";

        //echo$LinkString;
        return$LinkString;
    }
/*
private
读入文件的基本设置
*/
functionReadAdFile($adfile)
    {
    $FP=fopen($adfile,"r");
    while($buffer=@fgets($FP,1024))
        {
        if(!eregi("#",$buffer))
            {
            if(eregi("^*",$buffer))
                {
                $switchto="off";
                }

            $SetTemp=split("=",$buffer);

            if($switchto=="")
                {
                switch     ($SetTemp[0])
                    {
                    case"REDIRECT":
                    $this->Redirect=$SetTemp[1];
                    break;

                    case"WIDTH":
                    $this->WIDTH=$SetTemp[1];
                    break;

                    case"HEIGHT":
                    $this->HEIGHT=$SetTemp[1];
                    break;

                    case"BORDER":
                    $this->BORDER=$SetTemp[1];
                    break;
                    case"TARGET":
                    $this->Target=$SetTemp[1];
                    break;
                    }
                }
            else
                {
                switch     ($SetTemp[0])
                    {
                    case"image":
                    $i++;
                    $BannerData[$i]["image"]=$SetTemp[1];
                    //echo"<br>";echo$buffer;echo$SetTemp[1];
                    //echo$BannerData[$i]["image"];
                    break;

                    case"url":
                    $BannerData[$i]["url"]=$SetTemp[1];
                    break;

                    case"title":
                    $BannerData[$i]["title"]=$SetTemp[1];
                    break;

                    case"rate":
                    $BannerData[$i]["rate"]=$SetTemp[1];
                    break;
                    }//endofswitch
                }//endofif($switch)
            }//endofif(#)

        }//endofwhile

    return$BannerData;

    }//endoffunction

}//endofclass

/*
使用方法
广告设置文件书写格式banner.txt
------开始---
REDIRECT=./adredir.asp
WIDTH=468
HEIGHT=60
BORDER=0
*

#注释

#某某公司广告1
image=../banner/1.gif
url=http://www.asps0ite.com1
title=One
rate=30
----结束-----
说明：
与ASP的广告组件相仿
*表示设置,其他为图片的设置#：表示注释

----使用-----
$banner=newAdRotator();
echo$banner->GetAdvertisement("./banner.txt");
echo$banner->GetAdvertisement("./banner.txt");
echo$banner->GetAdvertisement("./banner.txt");
*/
?>  

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