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php实现文件下载和多文件上传

时间:2014-12-16 21:06:13      阅读:293      评论:0      收藏:0      [点我收藏+]

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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:

common.func.php

<?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;


php实现文件下载和多文件上传

标签:des   style   blog   http   ar   io   color   os   sp   

原文地址:http://blog.csdn.net/buyingfei8888/article/details/41923573

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