代码
<?php
$Adminroot=dirname(__FILE__);
$path=str_replace("/admin","/upload/indexAd",$Adminroot);
 if(isset($_GET['act'])){
    if($_GET['act']=='rename'){
        $y=$_GET['y'];
        $m=$_GET['m'];
         if(!file_exists($path.'/'.$y)){
            echo "err3文件不存在";
         }
         list($filesname,$kzm)=explode(".",$m); //获取扩展名
        if($kzm=="gif" or $kzm=="jpg" or $kzm=="JPG") { //文件过滤
            if(rename_jpg($y,$m)){
                echo "success1,修改成功";
            }else{
                echo "err1,失败";
            }
            exit;
            
        }else{
            echo "err4图片必须修改成图片扩展名 .gif .jpg .JPG";
            exit;
        }
        
    }
    if($_GET['act']=='upload'){
        //print_r($_FILES['photo']);
    $upTemp=move_uploaded_file($_FILES['photo']['tmp_name'], '../upload/indexAd/'.$_FILES['photo']['name']);    
    if($upTemp){
        echo"<script>alert('上传成功');</script>";
        Header("Location: AdImagesManger.php"); 
        exit;
    }else{
        echo"上传失败";
        exit;
    }
     exit;
    }
  }
  function rename_jpg($y,$m){
    return rename($path.'/'.$y."", $path.'/'.$m."");
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
 <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
  <TITLE>广告图片管理</TITLE>
 </HEAD>
 <script src="js/jquery1_3_2.js" type="text/javascript"></script>
 <BODY>
 <form enctype="multipart/form-data">
  <?php 

 
  $page=$_GET['page'];//获取当前页数

$max=3;//设置每页显示图片最大张数

$handle = opendir($path); //当前目录

    while (false !== ($file = readdir($handle))) { //遍历该php文件所在目录
      list($filesname,$kzm)=explode(".",$file); //获取扩展名

        if($kzm=="gif" or $kzm=="jpg" or $kzm=="JPG") { //文件过滤

          if (!is_dir('./'.$file)) { //文件夹过滤

            //$array[]=$file; //把符合条件的文件名存入数组
             $array[]=array( 'name'=>$file, 'updatetime'=>filemtime($path.'/'.$file));

            $i++;//记录图片总张数

           }

          }

    }

function sort_query($arr1,$arr2)
{ 
    if ($arr1['updatetime'] == $arr2['updatetime']) return 0;
    return ($arr1['updatetime'] > $arr2['updatetime'] ) ? -1 : 1;
}
usort($array, "sort_query"); 
for ($j=$max*$page;$j<($max*$page+$max)&&$j<$i;++$j){//循环条件控制显示图片张数
    echo "<img width=150 height=110 src='http://".$_SERVER['SERVER_NAME']."/public/upload/indexAd/".$array[$j]['name']."'></a><br><input type='text' readonly id='tpy_".$j."' value='".$array[$j]['name']."'><input type='text' id='tpm_".$j."'><input type='button' onclick='editname(".$j.");' value='修改文件名'><br>";
    //echo date("Y-m-d h:m:s",$array[$j]['updatetime'])."<br>";
}

$Previous_page=$page-1;
$next_page=$page+1;
if ($Previous_page<0){

    echo "上页";

    echo "<a href=?page=$next_page>下页</a>";

}

    else if ($page<=$i/$max){

      echo "<a href=?page=$Previous_page>上页</a>";

      echo "<a href=?page=$next_page>下页</a>";}

        else{

          echo " <a href=?page=$Previous_page>上页</a>";

          echo "下页";

        }
  ?>
  <label>
 
  </label>
 </form>
 <form name="form2" method="post" action="?act=upload" enctype="multipart/form-data">
  <input type="file" name="photo" id="fileField">
  <label>
  <input type="submit" name="button" id="button" value="提交">
  </label>
 </form>
 <script>
function editname(i){
    tpy='#tpy_'+i;
    tpm='#tpm_'+i;

    $.ajax({
        type:"GET",
        url:'AdImagesManger.php',
        data:"act=rename&y="+$(tpy).val()+"&m="+$(tpm).val(),
        success:function(msg){            
                window.location.reload();
                document.forms[0].reset();
                alert(msg);            
        }
    });
}
  </script>
 </BODY>
</HTML>