php获取文件夹路径内的图片以及分页显示示例

<div style="width: 90%; margin: 10px auto; border: 1px solid #c; text-align: center">
    <?php
    $page=isset($_GET['page'])?$_GET['page']:0;//从零开始
    $imgnums = 10;    //每页显示的图片数
    $path="upload";   //图片保存的目录
    $handle = opendir($path);
    $i=0;
    while (false !== ($file = readdir($handle))) {
       list($filesname,$ext)=explode(".",$file);
       if($ext=="gif" or $ext=="jpg" or $ext=="JPG" or $ext=="GIF" ) {
           if (!is_dir('./'.$file)) {
              $array[]=$file;//保存图片名称
              ++$i;
           }
       }
    }

    if($array){
       rsort($array);//修改日期倒序排序
    }
    for($j=$imgnums$page; $j<($imgnums$page+$imgnums)&&$j<$i; ++$j){
       echo '<div>';
       echo $array[$j],'<br />';
       echo "<img src=".$path."/".$array[$j]."><br />";
       echo '</div>';
    }
    $realpage = @ceil($i / $imgnums) - 1;
    $Prepage = $page-1;
    $Nextpage = $page+1;
    if($Prepage<0){
       echo "上一页 ";
       echo "<a href=?page=$Nextpage>下一页</a> ";
       echo "<a href=?page=$realpage>最末页</a> ";
    }elseif($Nextpage >= $realpage){
       echo "<a href=?page=0>首页</a> ";
       echo " <a href=?page=$Prepage>上一页</a> ";
       echo " 下一页";
    }else{
       echo "<a href=?page=0>首页</a> ";
       echo "<a href=?page=$Prepage>上一页</a> ";
       echo "<a href=?page=$Nextpage>下一页</a> ";
       echo "<a href=?page=$realpage>最末页</a> ";
    }
    ?>
</div>