Let’s take a look first, the example calling method:
Rendering:
Let’s take a look at the code. Upload the class first?/*
TITLE : CLASS Upload
FILE : class.upload.php
DESCRIPTION: To provide upload utility,
AUTHOR : Peng Zhang zpadmin()gmail.com http://blog.neten.de
BASED ON : whxbb whxbb()21cn.com
WRITED : 2005 NOV 20
MODIFIED : 2006 MAR 01
modified by psdshow (psdshow(at)yahoo.com.cn) 2007-11-30
LICENCE : GPL
REVISION : V1.0.2
*/
class Upload{
var $saveName;// Save name
var $savePath;// Save path
var $fileFormat = array('gif','jpg','doc','application/octet-stream');//File format & MIME limitation
var $overwrite = 0;//Overwrite mode
var $ maxSize = 0; // Maximum file bytes
var $ext; // File extension
var $thumb = 0; // Whether to generate thumbnails
var $thumbWidth = 130; // Thumbnails Width
var $thumbHeight = 130;//Thumbnail height
var $thumbPrefix = "_thumb_";// Thumbnail prefix
var $errno;//Error code
var $returnArray= array (); // Return information for all files
var $returninfo= array(); // Return information for each file
// Constructor
// @param $savePath File saving path
// @param $fileFormat file format limit array
// @param $maxSize maximum file size
// @param $overwriet whether to overwrite 1, allow overwriting 0, prohibit overwriting
function Upload($savePath, $fileFormat='',$maxSize = 0, $overwrite = 0) {
$this->setSavepath($savePath);
$this->setFileformat($fileFormat );
$this->setMaxsize($maxSize);
$this->setOverwrite($overwrite);
$this->setThumb($this->thumb, $this- >thumbWidth,$this->thumbHeight);
$this->errno = 0;
}
// Upload
// @param $fileInput webpageForm(form )
// @param $changeName Whether to change the file name
function run($fileInput,$changeName = 1){
if(isset($_FILES[$fileInput])){
$fileArr = $_FILES[$fileInput];
if(is_array($fileArr['name'])){//Upload multiple files with the same file domain name
for($i = 0; $ i < count($fileArr['name']); $i++){
$ar['tmp_name'] = $fileArr['tmp_name'][$i];
$ar['name' ] = $fileArr['name'][$i];
$ar['type'] = $fileArr['type'][$i];
$ar['size'] = $fileArr ['size'][$i];
$ar['error'] = $fileArr['error'][$i];
$this->getExt($ar['name'] );//Get the extension and assign it to $this->ext, it will be updated in the next cycle
$this->setSavename($changeName == 1 ? '' : $ar['name']); //Set the save file name
if($this->copyfile($ar)){
$this->returnArray[] = $this->returninfo;
}else{
$this->returninfo['error'] = $this->errmsg();
$this->returnArray[] = $this->returninfo;
}
}
return $this->errno ? false : true;
}else{//Upload a single file
$this->getExt($fileArr['name']);//Get the extension
$this->setSavename($changeName == 1 ? '' : $fileArr['name']);//Set the save file name
if($this->copyfile($fileArr)){
$this->returnArray[] = $this->returninfo;
}else{
$this->returninfo['error'] = $this->errmsg();
$this->returnArray[] = $this->returninfo;
}
return $this->errno ? false : true;
}
return false;
}else{
$this->errno = 10;
return false;
}
}
//Single file upload
// @param $fileArray file information array
function copyfile($fileArray){
$this->returninfo = array();
// Return Information
$this->returninfo['name'] = $fileArray['name'];
$this->returninfo['saveName'] = $this->saveName;
$ this->returninfo['size'] = number_format( ($fileArray['size'])/1024 , 0, '.', ' ');//In KB
$this->returninfo ['type'] = $fileArray['type'];
// Check file format
if (!$this->validateFormat()){
$this->errno = 11;
return false;
}
// Check whether the directory is writable
if(!@is_writable($this->savePath)){
$this->errno = 12;
return false;
}
// If overwriting is not allowed, check if the file already exists
//if($this->overwrite == 0 && @file_exists($this-> savePath.$fileArray['name'])){
// $this->errno = 13;
// return false;
//}
// If there is a size limit, Check if the file exceeds the limit
if ($this->maxSize != 0 ){
if ($fileArray["size"] > $this->maxSize){
$this-> ;errno = 14;
return false;
}
}
// File upload
if(!@move_uploaded_file($fileArray["tmp_name"], $this->savePath. $this->saveName)){
$this->errno = $fileArray["error"];
return false;
}elseif( $this->thumb ){// Create Thumbnail
$CreateFunction = "imagecreatefrom".($this->ext == 'jpg' ? 'jpeg' : $this->ext);
$SaveFunction = "image".($this ->ext == 'jpg' ? 'jpeg' : $this->ext);
if (strtolower($CreateFunction) == "imagecreatefromgif"
&& !function_exists("imagecreatefromgif")) {
$this->errno = 16;
return false;
} elseif (strtolower($CreateFunction) == "imagecreatefromjpeg"
&& !function_exists("imagecreatefromjpeg")) {
$this->errno = 17;
return false;
} elseif (!function_exists($CreateFunction)) {
$this->errno = 18;
return false;
}
$Original = @$CreateFunction($this->savePath.$this->saveName);
if (!$Original) {$this->errno = 19; return false ;}
$originalHeight = ImageSY($Original);
$originalWidth = ImageSX($Original);
$this->returninfo['originalHeight'] = $originalHeight;
$this- >returninfo['originalWidth'] = $originalWidth;
/*
if (($originalHeight < $this->thumbHeight
&& $originalWidth < $this->thumbWidth)) {
// If the thumbnail is smaller than expected, then Copy
move_uploaded_file($this->savePath.$this->saveName,
$this->savePath.$this-> thumbPrefix.$this->saveName);
} else {
if( $originalWidth > $this->thumbWidth ){// width > Set width
$thumbWidth = $this- >thumbWidth ;
$thumbHeight = $this->thumbWidth * ( $originalHeight / $originalWidth );
if($thumbHeight > $this->thumbHeight){// Height> Set height
$thumbWidth = $this->thumbHeight * ( $thumbWidth / $thumbHeight );
$thumbHeight = $this->thumbHeight ;
}
}elseif( $originalHeight > $this ->thumbHeight ){// High> Set height
$thumbHeight = $this->thumbHeight ;
$thumbWidth = $this->thumbHeight * ( $originalWidth / $originalHeight );
if($thumbWidth > $this->thumbWidth){// 宽 > 设定宽度
$thumbHeight = $this->thumbWidth * ( $thumbHeight / $thumbWidth );
$thumbWidth = $this->thumbWidth ;
}
}
*/
$radio=max(($originalWidth/$this->thumbWidth),($originalHeight/$this->thumbHeight));
$thumbWidth=(int)$originalWidth/$radio;
$thumbHeight=(int)$originalHeight/$radio;
if ($thumbWidth == 0) $thumbWidth = 1;
if ($thumbHeight == 0) $thumbHeight = 1;
$createdThumb = imagecreatetruecolor($thumbWidth, $thumbHeight);
if ( !$createdThumb ) {$this->errno = 20; return false;}
if ( !imagecopyresampled($createdThumb, $Original, 0, 0, 0, 0,
$thumbWidth, $thumbHeight, $originalWidth, $originalHeight) )
{$this->errno = 21; return false;}
if ( !$SaveFunction($createdThumb,
$this->savePath.$this->thumbPrefix.$this->saveName) )
{$this->errno = 22; return false;}
}
// 删除临时文件
/*
if(!@$this->del($fileArray["tmp_name"])){
return false;
}
*/
return true;
}
// 文件格式检查,MIME检测
function validateFormat(){
if(!is_array($this->fileFormat)
|| in_array(strtolower($this->ext), $this->fileFormat)
|| in_array(strtolower($this->returninfo['type']), $this->fileFormat) )
return true;
else
return false;
}
// 获取文件扩展名
// @param $fileName 上传文件的原文件名
function getExt($fileName){
$ext = explode(".", $fileName);
$ext = $ext[count($ext) - 1];
$this->ext = strtolower($ext);
}
// 设置上传文件的最大字节限制
// @param $maxSize 文件大小(bytes) 0:表示无限制
function setMaxsize($maxSize){
$this->maxSize = $maxSize;
}
// 设置文件格式限定
// @param $fileFormat 文件格式数组
function setFileformat($fileFormat){
if(is_array($fileFormat)){$this->fileFormat = $fileFormat ;}
}
// 设置覆盖模式
// @param overwrite 覆盖模式 1:允许覆盖 0:禁止覆盖
function setOverwrite($overwrite){
$this->overwrite = $overwrite;
}
// 设置保存路径
// @param $savePath 文件保存路径：以 "/" 结尾，若没有 "/"，则补上
function setSavepath($savePath){
$this->savePath = substr( str_replace("","/", $savePath) , -1) == "/"
? $savePath : $savePath."/";
}
// 设置缩略图
// @param $thumb = 1 产生缩略图 $thumbWidth,$thumbHeight 是缩略图的宽和高
function setThumb($thumb, $thumbWidth = 0,$thumbHeight = 0){
$this->thumb = $thumb;
if($thumbWidth) $this->thumbWidth = $thumbWidth;
if($thumbHeight) $this->thumbHeight = $thumbHeight;
}
// 设置文件保存名
// @param $saveName 保存名，如果为空，则系统自动生成一个随机的文件名
function setSavename($saveName){
if ($saveName == ''){ // 如果未设置文件名，则生成一个随机文件名
$name = date('YmdHis')."_".rand(100,999).'.'.$this->ext;
//判断文件是否存在,不允许重复文件
if(file_exists($this->savePath . $name)){
$name = setSavename($saveName);
}
} else {
$name = $saveName;
}
$this->saveName = $name;
}
// 删除文件
// @param $fileName 所要删除的文件名
function del($fileName){
if(!@unlink($fileName)){
$this->errno = 15;
return false;
}
return true;
}
// 返回上传文件的信息
function getInfo(){
return $this->returnArray;
}
// 得到错误信息
function errmsg(){
$uploadClassError = array(
0 =>'There is no error, the file uploaded with success. ',
1 =>'The uploaded file exceeds the upload_max_filesize directive in php.ini.',
2 =>'The uploaded file exceeds the MAX_FILE_SIZE that was specified in the HTML form.',
3 =>'The uploaded file was only partially uploaded. ',
4 =>'No file was uploaded. ',
6 =>'Missing a temporary folder. Introduced in PHP 4.3.10 and PHP 5.0.3. ',
7 =>'Failed to write file to disk. Introduced in PHP 5.1.0. ',
10 =>'Input name is not unavailable!',
11 =>'The uploaded file is Unallowable!',
12 =>'Directory unwritable!',
13 =>'File exist already!',
14 =>'File is too big!',
15 =>'Delete file unsuccessfully!',
16 =>'Your version of PHP does not appear to have GIF thumbnailing support.',
17 =>'Your version of PHP does not appear to have JPEG thumbnailing support.',
18 =>'Your version of PHP does not appear to have pictures thumbnailing support.',
19 =>'An error occurred while attempting to copy the source image .
Your version of php ('.phpversion().') may not have this image type support.',
20 =>'An error occurred while attempting to create a new image.',
21 =>'An error occurred while copying the source image to the thumbnail image.',
22 =>'An error occurred while saving the thumbnail image to the filesystem.
Are you sure that PHP has been configured with both read and write access on this folder?',
);
if ($this->errno == 0)
return false;
else
return $uploadClassError[$this->errno];
}
}
?>
下面看看是怎么调用 的.:
//如果收到表单传来的参数，则进行上传处理，否则显示表单
if(isset($_FILES['uploadinput'])){
//建目录函数，其中参数$directoryName最后没有"/"，
//要是有的话，以'/'打散为数组的时候，最后将会出现一个空值
function makeDirectory($directoryName) {
$directoryName = str_replace("","/",$directoryName);
$dirNames = explode('/', $directoryName);
$total = count($dirNames) ;
$temp = '';
for($i=0; $i<$total; $i++) {
$temp .= $dirNames[$i].'/';
if (!is_dir($temp)) {
$oldmask = umask(0);
if (!mkdir($temp, 0777)) exit("不能建立目录 $temp");
umask($oldmask);
}
}
return true;
}
if($_FILES['uploadinput']['name'] <> ""){
//Contains upload file class
require_once ('class.upload.php');
//Set the file upload directory
$savePath = "upload";
//Create the directory
makeDirectory($savePath);
//Allowed file types
$fileFormat = array( 'gif','jpg','jpge','png');
//File size limit, unit: Byte, 1KB = 1000 Byte
//0 means no limit, but subject to php.ini Impact of upload_max_filesize setting
$maxSize = 0;
//Will the original file be overwritten? 0 Not allowed 1 Allowed
$overwrite = 0;
//Initialize upload class
$f = new Upload($savePath, $fileFormat, $maxSize, $overwrite);
//If you want To generate a thumbnail, call the member function $f->setThumb();
//Parameter list: setThumb($thumb, $thumbWidth = 0,$thumbHeight = 0)
//$thumb=1 means To generate a thumbnail, when not called, its value is 0
//$thumbWidth Thumbnail width, unit is pixel (px), if left blank, use the default value of 130
//$thumbHeight Thumbnail height, unit is the pixel (px), leave it blank and use the default value 130
$f->setThumb(1);
//The uploadinput in the parameter is the name of the input box for uploading files in the form
//The following 0 means not to change the file name. If it is 1, the system will generate a random file name
if (!$f->run('uploadinput',1)){
//Passed $f->errmsg() can only get the last error information,
//Detailed information can be obtained in $f->getInfo().
echo $f->errmsg()."
n";
}
//The upload result is saved in the array returnArray.
echo "
";<br> print_r($f->getInfo());<br> echo "";
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