php 文件上传,下载

文件下载:

html:

<html>
<body>
  <a href="1.rar">下载1.rar</a>
  <br />
  <a href="1.jpg">下载1.jpg</a> <!--会显示文件内容,而不是下载-->
  <br />
  <a href="doDownload.php?filename=1.jpg">通过程序下载1.jpg</a>
  <br />
  <a href="doDownload.php?filename=../upload/nv.jpg">下载nv.jpg</a>
</body>
</html>

php处理:

<?php 
$filename=$_GET['filename'];
//设置下载文件名
header('content-disposition:attachment;filename='.basename($filename));
header('content-length:'.filesize($filename));
readfile($filename);

文件上传:

html代码:

<html>
<body>
  <form action="doAction5.php" method="post" enctype="multipart/form-data">
    请选择您要上传的文件:<input type="file" name='myFile1' /><br/>
    请选择您要上传的文件:<input type="file" name='myFile2' /><br/>
    请选择您要上传的文件:<input type="file" name='myFile[]' /><br/>
    请选择您要上传的文件:<input type="file" name='myFile[]' /><br/>
    请选择您要上传的文件:<input type="file" name='myFile[]' multiple="multiple" /><br/>
    <input type="submit" value="上传文件" />
  </form>
</body>
</html>

php代码:

<?php 
/**
 * 得到文件扩展名
 * @param string $filename
 * @return string
 */
function getExt($filename){
  return strtolower(pathinfo($filename,PATHINFO_EXTENSION));
}

/**
 * 产生唯一字符串
 * @return string
 */
function getUniName(){
  return md5(uniqid(microtime(true),true));
}

upload.func1.php

<?php 

/**
 * 构建上传文件信息
 * @return unknown
 */
function getFiles(){
  $i=0;
  foreach($_FILES as $file){
    if(is_string($file['name'])){
      $files[$i]=$file;
      $i++;
    }elseif(is_array($file['name'])){
      foreach($file['name'] as $key=>$val){
        $files[$i]['name']=$file['name'][$key];
        $files[$i]['type']=$file['type'][$key];
        $files[$i]['tmp_name']=$file['tmp_name'][$key];
        $files[$i]['error']=$file['error'][$key];
        $files[$i]['size']=$file['size'][$key];
        $i++;
      }
    }
  }
  return $files;
  
}
/**
 * 针对于单文件、多个单文件、多文件的上传
 * @param array $fileInfo
 * @param string $path
 * @param string $flag
 * @param number $maxSize
 * @param array $allowExt
 * @return string
 */
function uploadFile($fileInfo,$path='./uploads',$flag=true,$maxSize=1048576,$allowExt=array('jpeg','jpg','png','gif')){
  //$flag=true;
  //$allowExt=array('jpeg','jpg','gif','png');
  //$maxSize=1048576;//1M
  //判断错误号
  if($fileInfo['error']===UPLOAD_ERR_OK){
    //检测上传得到小
    if($fileInfo['size']>$maxSize){
      $res['mes']=$fileInfo['name'].'上传文件过大';
    }
    $ext=getExt($fileInfo['name']);
    //检测上传文件的文件类型
    if(!in_array($ext,$allowExt)){
      $res['mes']=$fileInfo['name'].'非法文件类型';
    }
    //检测是否是真实的图片类型
    if($flag){
      if(!getimagesize($fileInfo['tmp_name'])){
        $res['mes']=$fileInfo['name'].'不是真实图片类型';
      }
    }
    //检测文件是否是通过HTTP POST上传上来的
    if(!is_uploaded_file($fileInfo['tmp_name'])){
      $res['mes']=$fileInfo['name'].'文件不是通过HTTP POST方式上传上来的';
    }
    if($res) return $res;
    //$path='./uploads';
    if(!file_exists($path)){
      mkdir($path,0777,true);
      chmod($path,0777);
    }
    $uniName=getUniName();
    $destination=$path.'/'.$uniName.'.'.$ext;
    if(!move_uploaded_file($fileInfo['tmp_name'],$destination)){
      $res['mes']=$fileInfo['name'].'文件移动失败';
    }
    $res['mes']=$fileInfo['name'].'上传成功';
    $res['dest']=$destination;
    return $res;
    
  }else{
    //匹配错误信息
    switch ($fileInfo ['error']) {
      case 1 :
        $res['mes'] = '上传文件超过了PHP配置文件中upload_max_filesize选项的值';
        break;
      case 2 :
        $res['mes'] = '超过了表单MAX_FILE_SIZE限制的大小';
        break;
      case 3 :
        $res['mes'] = '文件部分被上传';
        break;
      case 4 :
        $res['mes'] = '没有选择上传文件';
        break;
      case 6 :
        $res['mes'] = '没有找到临时目录';
        break;
      case 7 :
      case 8 :
        $res['mes'] = '系统错误';
        break;
    }
    return $res;
  }
}

doAction5.php

<?php 
//print_r($_FILES);
header("content-type:text/html;charset=utf-8");
require_once 'upload.func1.php';
require_once 'common.func.php';
$files=getFiles();
// print_r($files);
foreach($files as $fileInfo){
  $res=uploadFile($fileInfo);
  echo $res['mes'],'<br/>';
  $uploadFiles[]=$res['dest'];
}
$uploadFiles=array_values(array_filter($uploadFiles));
print_r($uploadFiles);

上面是通过函数实现,下载封装成为类:

html:

<html xmlns="http://www.w3.org/1999/xhtml">
<body>
<form action="doAction6.php" method="post" enctype="multipart/form-data">
    请选择您要上传的文件:<input type="file" name='myFile1' />
    <input type="submit" value="上传文件" />
</form>
</body>
</html>

upload.class.php

<?php 
class upload{
  protected $fileName;
  protected $maxSize;
  protected $allowMime;
  protected $allowExt;
  protected $uploadPath;
  protected $imgFlag;
  protected $fileInfo;
  protected $error;
  protected $ext;
  /**
   * @param string $fileName
   * @param string $uploadPath
   * @param string $imgFlag
   * @param number $maxSize
   * @param array $allowExt
   * @param array $allowMime
   */
  public function __construct($fileName='myFile',$uploadPath='./uploads',$imgFlag=true,$maxSize=5242880,$allowExt=array('jpeg','jpg','png','gif'),$allowMime=array('image/jpeg','image/png','image/gif')){
    $this->fileName=$fileName;
    $this->maxSize=$maxSize;
    $this->allowMime=$allowMime;
    $this->allowExt=$allowExt;
    $this->uploadPath=$uploadPath;
    $this->imgFlag=$imgFlag;
    $this->fileInfo=$_FILES[$this->fileName];
  }
  /**
   * 检测上传文件是否出错
   * @return boolean
   */
  protected function checkError(){
    if(!is_null($this->fileInfo)){
      if($this->fileInfo['error']>0){
        switch($this->fileInfo['error']){
          case 1:
            $this->error='超过了PHP配置文件中upload_max_filesize选项的值';
            break;
          case 2:
            $this->error='超过了表单中MAX_FILE_SIZE设置的值';
            break;
          case 3:
            $this->error='文件部分被上传';
            break;
          case 4:
            $this->error='没有选择上传文件';
            break;
          case 6:
            $this->error='没有找到临时目录';
            break;
          case 7:
            $this->error='文件不可写';
            break;
          case 8:
            $this->error='由于PHP的扩展程序中断文件上传';
            break;
            
        }
        return false;
      }else{
        return true;
      }
    }else{
      $this->error='文件上传出错';
      return false;
    }
  }
  /**
   * 检测上传文件的大小
   * @return boolean
   */
  protected function checkSize(){
    if($this->fileInfo['size']>$this->maxSize){
      $this->error='上传文件过大';
      return false;
    }
    return true;
  }
  /**
   * 检测扩展名
   * @return boolean
   */
  protected function checkExt(){
    $this->ext=strtolower(pathinfo($this->fileInfo['name'],PATHINFO_EXTENSION));
    if(!in_array($this->ext,$this->allowExt)){
      $this->error='不允许的扩展名';
      return false;
    }
    return true;
  }
  /**
   * 检测文件的类型
   * @return boolean
   */
  protected function checkMime(){
    if(!in_array($this->fileInfo['type'],$this->allowMime)){
      $this->error='不允许的文件类型';
      return false;
    }
    return true;
  }
  /**
   * 检测是否是真实图片
   * @return boolean
   */
  protected function checkTrueImg(){
    if($this->imgFlag){
      if(!@getimagesize($this->fileInfo['tmp_name'])){
        $this->error='不是真实图片';
        return false;
      }
      return true;
    }
  }
  /**
   * 检测是否通过HTTP POST方式上传上来的
   * @return boolean
   */
  protected function checkHTTPPost(){
    if(!is_uploaded_file($this->fileInfo['tmp_name'])){
      $this->error='文件不是通过HTTP POST方式上传上来的';
      return false;
    }
    return true;
  }
  /**
   *显示错误 
   */
  protected function showError(){
    exit('<span style="color:red">'.$this->error.'</span>');
  }
  /**
   * 检测目录不存在则创建
   */
  protected function checkUploadPath(){
    if(!file_exists($this->uploadPath)){
      mkdir($this->uploadPath,0777,true);
    }
  }
  /**
   * 产生唯一字符串
   * @return string
   */
  protected function getUniName(){
    return md5(uniqid(microtime(true),true));
  }
/**
   * 上传文件
   * @return string
   */
public function uploadFile(){
if($this->checkError()&&$this->checkSize()&&$this->checkExt()&&$this->checkMime()&&$this->checkTrueImg()&&$this->checkHTTPPost()){
  $this->checkUploadPath();
  $this->uniName=$this->getUniName();
  $this->destination=$this->uploadPath.'/'.$this->uniName.'.'.$this->ext;
if(@move_uploaded_file($this->fileInfo['tmp_name'], $this->destination)){
return  $this->destination;
  }else{
  $this->error='文件移动失败';
  $this->showError();
  }
  }else{
  $this->showError();
  }
  }
}

doAction6.php

<?php 
header('content-type:text/html;charset=utf-8');
require_once 'upload.class.php';
$upload=new upload('myFile1','imooc');
$dest=$upload->uploadFile();
echo $dest;
posted on 2015-03-11 09:03  清明-心若淡定  阅读(433)  评论(0编辑  收藏  举报