<?php    
    session_start();
$url=‘http://‘.$_SERVER[‘HTTP_HOST‘].$_SERVER[‘PHP_SELF‘];
$save_dir="images";
$file_current_dir=dirname(__FILE__).‘/‘.$save_dir;
$filepath=‘http://‘.$_SERVER[‘HTTP_HOST‘].‘/‘.$save_dir;


/**
 * [file_upload 文件上传函数，支持单文件，多文件]
 * Author: 程威明
 * @param  string $name         input表单中的name
 * @param  string $save_dir         文件保存路径，相对于当前目录
 * @param  array  $allow_suffix 允许上传的文件后缀
 * @return array                array() {
 *                                         ["status"]=> 全部上传成功为true，全部上传失败为false，部分成功为成功数量
 *                                         ["path"]=>array() {已成功的文件路径}
 *                                         ["error"]=>array() {失败信息}
 *                                      }
 */
function files_upload($name="photo",$filename=‘file‘,$save_dir="images",$allow_suffix=array(‘jpg‘,‘jpeg‘,‘gif‘,‘png‘),$random_keys=‘A‘)
{
    //如果是单文件上传，改变数组结构
    if(!is_array($_FILES[$name][‘name‘])){
        $list = array();
        foreach($_FILES[$name] as $k=>$v){
            $list[$k] = array($v);
        }
        $_FILES[$name] = $list;
    }

    $response = array();
    $response[‘status‘] = array();
    $response[‘path‘] = array();
    $response[‘error‘] = array();

    //拼接保存目录
    $save_dir = ‘./‘.trim(trim($save_dir,‘.‘),‘/‘).‘/‘;

    //判断保存目录是否存在
    if(!file_exists($save_dir))
    {
        //不存在则创建
        if(false==mkdir($save_dir,0777,true))
        {
            $response[‘status‘] = false;
            $response[‘error‘][] = ‘文件保存路径错误,路径 "‘.$save_dir.‘" 创建失败‘;
        }
    }

    $num = count($_FILES[$name][‘tmp_name‘]);

    $success = 0;

    //循环处理上传
    for($i=0;$i <$num;$i++)
    {
        //判断是不是post上传
        if(!is_uploaded_file($_FILES[$name][‘tmp_name‘][$i]))
        {
            $response[‘error‘][] = ‘非法上传，文件 "‘.$_FILES[$name][‘name‘][$i].‘" 不是post获得的‘;
            continue;
        }

        //判断错误
        if($_FILES[$name][‘error‘][$i]>0)
        {
            $response[‘error‘][] = ‘文件 "‘.$_FILES[$name][‘name‘][$i].‘" 上传错误,error下标为 "‘.$_FILES[$name][‘error‘][$i].‘"‘;
            continue;
        }

        //获取文件后缀
        $suffix = ltrim(strrchr($_FILES[$name][‘name‘][$i],‘.‘),‘.‘);

        //判断后缀是否是允许上传的格式
        if(!in_array($suffix,$allow_suffix))
        {
            $response[‘error‘][] = ‘file "‘.$_FILES[$name][‘name‘][$i].‘"   types that are not allowed to upload ‘;
            continue;
        }

       if(empty($_SESSION[‘array‘][$filename])) {
            $_SESSION[‘array‘][$filename]=array("A"=>"A","B"=>"B","C"=>"C","D"=>"D","E"=>"E",‘F‘=>"F",‘G‘=>"G",‘H‘=>"H",‘I‘=>"I",‘J‘=>"J",‘K‘=>"K");
       }
        $random_keys=array_shift($_SESSION[‘array‘][$filename]);
        unset($_SESSION[‘array‘][$filename][$random_keys]);
 
        //得到上传后文件名
        $new_file_name =$filename.$random_keys.‘.‘.$suffix;
        
        //拼接完整路径
        $new_path = $save_dir.$new_file_name;

        //上传文件 把tmp文件移动到保存目录中
        if(!move_uploaded_file($_FILES[$name][‘tmp_name‘][$i],$new_path))
        {
            $response[‘error‘][] = ‘文件 "‘.$_FILES[$name][‘name‘][$i].‘" 从临时文件夹移动到保存目录时发送错误‘;
            continue;
        }

        //返回由图片文件路径组成的数组
        $response[‘path‘][] =$save_dir.$new_file_name;

        $success++;
    }

    if(0==$success){
        $success = false;
    }elseif($success==$num){
        $success = true;
    }

    $response[‘status‘] = $success;
    


    return $response;
}
        
        
        if(empty($_SESSION[‘filename‘])){
            $_SESSION[‘filename‘]=‘‘;
        }
        

    //文件改名
    if(@$_POST[‘action‘]==‘rename‘)
    {
        $oldname=$_POST[‘oldname‘];
        //$oldname=str_replace(substr($oldname,strrpos($oldname,‘.‘)),‘‘,$oldname);
        $oldname=$save_dir."/".$oldname;
        $newname=$save_dir."/".$_POST[‘newfilename‘].‘.‘.$_POST[‘ext‘];
       
        $result=rename($oldname,$newname);
        if($result==true){
            header(‘Location: ‘.$url);
        }
    }
    
    //文件删除
    if(@$_POST[‘action‘]==‘del‘)
    {
        $result=0;
        $file = $save_dir."/".$_POST[‘filename‘]; 
        echo $file;
        $result = @unlink($file) or die(‘dsd‘);; 
        if ($result == true) { 
            $result=1; 
        }  
        echo $result;
    }
    
    if(@$_POST[‘action‘]==‘upload‘){
        $filename=$_POST[‘filename‘];
        $_SESSION[‘filename‘]=$filename;
        $aa=files_upload(‘file‘,$filename,‘images‘,array(‘jpg‘,‘jpeg‘,‘gif‘,‘png‘),$random_keys);
         
        if($aa[‘status‘]==true){
            header(‘Location: ‘.$url);
        } else {
            echo $aa[‘error‘][0];
        }
    } else {
        $dir = $file_current_dir;
        // Open a known directory, and proceed to read its contents
        if (is_dir($dir)) {
            if ($dh = opendir($dir)) {
                $i=0;
                while (($file = readdir($dh)) !== false) {
                    $size = intval((filesize($dir.‘/‘.$file)/1000)).‘k‘;
                    list($filesname,$kzm)=explode(".",$file);//获取扩展名  
                    if($kzm=="gif" or $kzm=="jpg" or $kzm=="JPG" or $kzm=="png") { //文件过滤  ?>
                    filename: <?php echo $file;?> <?php echo $size;?>  <img src="http://www.mamicode.com/<?php echo $filepath.‘/‘.$file ;?> " width="50px" height="50px"> <?php echo $filepath.‘/‘.$file;?> <a onclick="return rename(‘<?php echo $i;?>‘,‘<?php echo $file;?>‘,)" href=http://www.mamicode.com/‘#‘>rename</a> 
                        <form method="post" id="form_<?php echo $i;?>" action="1.php" style="display:none">
                        <input type="text" name="newfilename"  id="newfilename" > 
                        <input type="hidden" name="oldname"  id="oldname" value="http://www.mamicode.com/<?php echo $file;?>" > 
                        <input type="hidden" name="action" id="action" value="http://www.mamicode.com/rename">
                        <input type="hidden" name="ext" id="ext" value="http://www.mamicode.com/<?php echo $kzm;?>">
                        <input type="submit" name="submit" value="http://www.mamicode.com/Submit" />
                        </form>
                        <a onclick="return deldel(‘<?php echo $file;?>‘)" href=http://www.mamicode.com/‘#‘ >del 
"color: #000000">php
                        $i++;
                     }
                } 
                closedir($dh);
            }
        }
    ?>
<html>
<body>
<br>
<br>
<br>
<form action="1.php" method="post" enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" /> 
    <br />
    <label for="file">name</label>
<input type="text" name="filename" id="filename" value="http://www.mamicode.com/<?php echo $_SESSION[‘filename‘];?>">
<input type="hidden" name="action" value="http://www.mamicode.com/upload">
<br />
<input type="submit" name="submit" value="http://www.mamicode.com/Submit" />
</form>

</body>
</html>
    <?php
    }
    ?>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script>
    function rename(formid,filename)
    {
        $("#form_"+formid).toggle();
 
    }
    
    function deldel(filename)
    {
        var del=‘del‘;
         if(confirm(‘confirm del‘)){
              $.ajax({ 
                  type:‘post‘, 
                  url:‘<?php echo $url;?>‘, 
                  data: {action:del, filename:filename},      
                  success:function(data){ 
                      alert(‘del success‘);
                      location.reload();
                  }, 
                  error:function(){ 
                    alert(‘del fail，check file mod‘);
                  } 
                }); 
         }
        
    }    
</script>