PHP: $url='../images'; //图片地址，只可以用./you/images这样的路径 $files=array(); if ($handle=opendir("$url")) { while(false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { if(substr($file,-3)=='gif' || substr($file,-3)=='jpg') $files[count($files)] = $file; } } } closedir($handle); $random=rand(0,count($files)-1); if(substr($files[$random],-3)=='gif') header("Content-type: image/gif"); elseif(substr($files[$random],-3)=='jpg') header("Content-type: image/jpeg"); readfile("$url/$files[$random]");
PHP: <?php // 创建图片存放文件夹, 如 "../itgoos" or "任意目录/itgoos/". // 如果图片和本文件在同意目录下为空，否则添入. $folder = ''; // 文件扩展名以空格分隔. $exts = 'jpg jpeg png gif'; $files = array(); $i = -1; if ('' == $folder) $folder = './'; $handle = opendir($folder); $exts = explode(' ', $exts); while (false !== ($file = readdir($handle))) { foreach($exts as $ext) { if (preg_match('/\.'.$ext.'$/i', $file, $test)) { $files[] = $file; ++$i; } } } closedir($handle); mt_srand((double)microtime()*1000000); $rand = mt_rand(0, $i); header('Location: '.$folder.$files[$rand]); ?>
PHP: <?php $dir="imagetop/";//图片目录 $imgwidth=0;//图片宽度,为0则为原始大小 $iforder=0;//顺序显示还是随机显示,1为顺序显示,0为随机显示 session_start(); if($imgwidth==0){$imgwidth=="";}else{$imgwidth=="width='".$imgwidth."'";} $handle=opendir($dir); while ($file_name=readdir($handle)){ if(($file_name!==".")&&($file_name!=="..")){$file_list[]=$file_name; } } closedir($handle); if($iforder==1){ if(isset($_SESSION['sess_suijitupian'])){ if($_SESSION['sess_suijitupian']<count($file_list)-1){ $i=$_SESSION['sess_suijitupian'];$_SESSION['sess_suijitupian']=$_SESSION['sess_suijitupian']+1; }else{ $i=0;$_SESSION['sess_suijitupian']=1; } }else{$i=0;$_SESSION['sess_suijitupian']=1;} }else{ $num=count($file_list)-1; $i=rand(0,$num); } readfile($dir.$file_list[$i]); ?>
readrand.php(此程序实际上是生成一句javascript语言) PHP: <? $arrayall=file("tp.txt");读出tp.txt内容到数组 $arrays=count($arrayall); if ($arrays==1){//because rand(0,0) is wrong $selectrand=0; }else{ srand((double)microtime()*1000000);//设定随机数种子 $selectrand=rand(0,$arrays-1); } $exstr=explode(chr(9),$arrayall[$selectrand]);//从全部中随机取出一个并分割 ?> document.write('<a href="<? echo $exstr[1];?>" target="new"><img src="<? echo $exstr[2];?>" width="200" height="50" alt="<? echo $exstr[0];?>" ></a>'); HTML文件 <html> <body> <script language='javascript' src='readrand.php'> </script> </body> </html> (你可以把scripty放到你需要的位置，并可以加入setTimeout()函数以实现定时刷新)