search
HomeBackend DevelopmentPHP Tutorialphp实现文件下载和多文件上传

文件下载:

html:

    <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>

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:

    
请选择您要上传的文件:
请选择您要上传的文件:
请选择您要上传的文件:
请选择您要上传的文件:
请选择您要上传的文件:

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:


请选择您要上传的文件:

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;


Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
11 Best PHP URL Shortener Scripts (Free and Premium)11 Best PHP URL Shortener Scripts (Free and Premium)Mar 03, 2025 am 10:49 AM

Long URLs, often cluttered with keywords and tracking parameters, can deter visitors. A URL shortening script offers a solution, creating concise links ideal for social media and other platforms. These scripts are valuable for individual websites a

Introduction to the Instagram APIIntroduction to the Instagram APIMar 02, 2025 am 09:32 AM

Following its high-profile acquisition by Facebook in 2012, Instagram adopted two sets of APIs for third-party use. These are the Instagram Graph API and the Instagram Basic Display API.As a developer building an app that requires information from a

Working with Flash Session Data in LaravelWorking with Flash Session Data in LaravelMar 12, 2025 pm 05:08 PM

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

Build a React App With a Laravel Back End: Part 2, ReactBuild a React App With a Laravel Back End: Part 2, ReactMar 04, 2025 am 09:33 AM

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

Simplified HTTP Response Mocking in Laravel TestsSimplified HTTP Response Mocking in Laravel TestsMar 12, 2025 pm 05:09 PM

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

cURL in PHP: How to Use the PHP cURL Extension in REST APIscURL in PHP: How to Use the PHP cURL Extension in REST APIsMar 14, 2025 am 11:42 AM

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

12 Best PHP Chat Scripts on CodeCanyon12 Best PHP Chat Scripts on CodeCanyonMar 13, 2025 pm 12:08 PM

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

Announcement of 2025 PHP Situation SurveyAnnouncement of 2025 PHP Situation SurveyMar 03, 2025 pm 04:20 PM

The 2025 PHP Landscape Survey investigates current PHP development trends. It explores framework usage, deployment methods, and challenges, aiming to provide insights for developers and businesses. The survey anticipates growth in modern PHP versio

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment