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一个简单的php文件上传类，可以自定义文件名，可以设置允许上传的文件类型等，有需要的朋友，可以参考学习下。
代码如下：
<?php
/**
* 文件上传类
* bbs.it-home.org
* */
class UpFile{
private $filePath; //文件目的路径
private $fileField; //默认$_FILES[$fileField],通过$_FILES环境变量获取上传文件信息
private $originName; //源文件名
private $tmpFileName; //临时文件名
private $fileType; //文件类型
private $fileSize; //文件大小
private $newFileName; //新文件名
private $allowType=array('jpg','gif','png'); //
private $maxSize=2000000; //允许文件上传的最大度是2M
private $isUserDefName=false; //是否采用用户自定义名
private $userDefName; //用户定义名称
private $isRandName=true; //是否随机命名
private $randName; //系统随机名称
private $errorNum=0; //错误号
private $isCoverModer=true; //是否覆盖模式
function __construct($options=array()){
$this->setOptions($options); //设置上传时属性列表
}
function uploadFile($filefield){
$this->setOption('errorNum',0); //设置错误位
$this->setOption('fileField',$filefield); //设置fileField
$this->setFiles(); //设置文件信息
$this->checkValid(); //判断合法性
$this->checkFilePath(); //检查文件路径
$this->setNewFileName(); //设置新的文件名
if($this->errorNum<0)
return $this->errorNum;
return $this->copyFile(); //上传文件
}
private function setOptions($options=array()){
foreach ($options as $key=>$val){
if(!in_array($key,array('filePath','fileField','originName','allowType','maxSize','isUserDefName','userDefName','isRandName','randName')))
continue;
$this->setOption($key,$val);
}
}
private function setFiles(){
if($this->getFileErrorFromFILES!=0){
$this->setOptions('errorNum',-1);
return $this->errorNum;
}
$this->setOption('originName',$this->getFileNameFromFILES());
$this->setOption('tmpFileName',$this->getTmpFileNameFromFILES());
$this->setOption('fileType',$this->getFileTypeFromFILES());
$this->setOption('fileSize',$this->getFileSizeFromFILES());
}
private function setOption($key,$val){
$this->$key=$val;
}
private function setNewFileName(){
if($this->isRandName==false&&$this->isUserDefName==false){
$this->setOption('newFileName',$this->originName);
}elseif ($this->isRandName==true&&$this->isUserDefName=false){
$this->setOption('newFileName',$this->proRandName().'.'.$this->fileType);
}elseif ($this->isRandName==false&&$this->isUserDefName=true){
$this->setOption('newFileName',$this->userDefName);
}else {
$this->setOption('errorNum',-4);
}
}
private function checkValid(){
$this->checkFileSize();
$this->checkFileType();
}
private function checkFileType(){
if(!in_array($this->fileType,$this->allowType)){
$this->setOption('errorNum',-2);
}else {
return $this->errorNum;
}
}
private function checkFileSize(){
if($this->fileSize>$this->maxSize){
$this->setOption('errorNum',-3);
}else {
return $this->errorNum;
}
}
private function checkFilePath(){
if(!file_exists($this->filePath)){
if($this->isCoverModer){
$this->makePath();
}else {
$this->setOption('errorNum',-6);
}
}
}
private function proRandName(){
$tmpStr= "abcdefghijklmnopqrstuvwxyz0123456789";
$str="";
for ($i=0;$i<8;$i++){
$num=rand(0,strlen($tmpStr));
$str.=$tmpStr[$num];
}
return $str;
}
private function makePath(){
if(!@mkdir($this->filePath,0755)){
$this->setOption('errorNum',-7);
}
}
private function copyFile(){
$filePath=$this->filePath;
if($filePath[strlen($filePath)-1]!='/'){
$filePath.='/';
}
$filePath.=$this->newFileName;
if(!@move_uploaded_file($this->tmpFileName,$filePath)){
$this->setOption('errorNum',-5);
}
return $this->errorNum;
}
function getNewFileName(){
return $this->newFileName;
}
private function getFileErrorFromFILES(){
return $this->fileField['error'];
}
private function getFileTypeFromFILES(){
$str=$this->fileField['name'];
$aryStr=split("\.",$str); //将字符串分割到数组中
$ret=strtolower($aryStr[count($aryStr)-1]);
return $ret;
}
private function getFileNameFromFILES(){
return $this->fileField['name'];
}
private function getTmpFileNameFromFILES(){
return $this->fileField['tmp_name'];
}
private function getFileSizeFromFILES(){
return $this->fileField['size'];
}
public function getErrorMsg(){
$str="上传文件出错：";
switch ($this->errorNum){
case -1:
$str.="未知错误！";
break;
case -2:
$str.="未允许类型！";
break;
case -3:
$str.="文件过大！";
break;
case -4:
$str.="产生文件名出错！";
break;
case -5:
$str.="上传失败！";
break;
case -6:
$str.="目录不存在！";
break;
case -7:
$str.="建立目录失败！";
break;
}
return $str;
}
}
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