php file upload and download source code,
First, File upload
Front page:
DOCTYPE HTML><HTML><Head> <MetaCharSet= "Utf-8"> <title>File Upload
title>
Head><Body><Div> <formMethod= "POST"Action= "upload.php"enctype= "Multipart/form-data" >User name<inputtype= "text"name= "username">
input> <BR>File Brief Introduction<BR><textareaname= "Fileintro"rows= "8"cols= " the">
textarea > < BR > Select File to upload <br><input type= "File" name= "myfile">
input><br > <input type= "Submit" value= "Upload file" >
input >
form>
div>
body >
html>
Background processing:
Php//receive information about submitting a page transfer$name=$_post[' username '];$intro=$_post[' Fileintro '];//information about files in $_files//echo "";//Print_r ($_files);//echo"";//You can limit the size of the file here/*$filesize = $_files[' myfile ' [' Size '];if ($filesize >2*1024*1024) {echo "file too large to upload"; Exit ();}*/ //file types can be restricted /*$filetype = $_files[' myfile ' [' type ']; if ($filetype! = ' image/jpg ' && $filetype! = ' application/pdf ') {echo "File type can only be jpg and PDF"; Exit (); }*/ if(Is_uploaded_file($_files[' MyFile '] [' Tmp_name '])) { //dump the files into the directory you want to store $uploaded=$_files[' MyFile '] [' Tmp_name ']; //Each user dynamically creates a folder $userpath=$_server[' Document_root ']. " /up/".$name; //determine if the user already has a folder if(!file_exists($userpath)){ mkdir($userpath); } //prevents the same user from uploading a file with the same name, adding a timestamp to the file. $moveto = $userpath. " /". Time (). $_files[' myfile ' [' name ']; or modify the file name, but you need to use string processing to intercept the filename suffix . $truename=$_files[' MyFile '] [' Name ']; $moveto=$userpath." /". Time().substr($truename,Strrpos($truename,".")); if(Move_uploaded_file($uploaded,Iconv("Utf-8", "gb2312",$moveto))){ Echo"Upload file".$_files[' MyFile '] [' name ']. " Success; }Else{ Echo"Upload file".$_files[' MyFile '] [' name ']. " Failed; }}Else{ Echo"Upload file".$FILES[' MyFile '] [' name ']. " Failed;}?>
Second, the file download:
Single File Download:
PhpfunctionDown_file ($file _name,$file _path){ //$file _name = Iconv ("Uft-8", "gb2312", $file _name); If the file name is in Chinese, the Chinese name needs to be transcoded gb2312//The file to be downloaded reads into the server's memory//the server returns the file data to the browser//browser writes the file to the user-specified location//1. Determine if a file exists if(!file_exists($file _name)){ Echo"111"; return ; } $fp=fopen($file _name, "R"); $file _size=filesize($file _name); //get file Size//can limit browser download file size via file_size. The returned file Header("Content-type:application/octet-stream"); //return by byte size Header("Accept-ranges:bytes"); //return file Size Header("Accept-length:$file _size"); //Client Pop-up dialog box, corresponding file name Header("Content-disposition:attachment;filename=".$file _name); $buffer= 1024; //define buffers//To download the security, it is best to use the file byte read counter $file _count= 0; //feof used to determine whether a file is read to the end of a document while(!feof($fp) && ($file _size-$file _count>0)){ $file _data=fread($fp,$buffer); //How many bytes did the statistic read ? $file _count+$buffer; Echo $file _data; //send some data to the browser } fclose($fp); //Close File }?>
Multiple file Downloads:
downlist.php:
Down
Down
Down
Down
downprocess.php:
Php$filename=$_request[' filename ']; functionDown_file ($file _name){ if(!file_exists($file _name)){ Echo"111"; return ; } $fp=fopen($file _name, "R"); $file _size=filesize($file _name); Header("Content-type:application/octet-stream"); //return by byte size Header("Accept-ranges:bytes"); //return file Size Header("Accept-length:$file _size"); //Client Pop-up dialog box, corresponding file name Header("Content-disposition:attachment;filename=".$file _name); $buffer= 1024; //Defining Buffers $file _count= 0; //feof used to determine whether a file is read to the end of a document while(!feof($fp) && ($file _size-$file _count>0)){ $file _data=fread($fp,$buffer); //How many bytes did the statistic read ? $file _count+$buffer; Echo $file _data; //send some data to the browser } fclose($fp); } down_file ($filename);?>
http://www.bkjia.com/PHPjc/1131344.html www.bkjia.com true http://www.bkjia.com/PHPjc/1131344.html techarticle php file upload and download source code, a File upload front page:! DOCTYPE HTML HTML head meta charset = "Utf-8" title file upload/Title/head body div Form method = "Post" a ...
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