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php实现文件上传

2018-02-03 10:37 162 查看
存档：

upload1.html(单文件上传)

<html>
<head>
<title>单个文件上传</title>
</head>
<body>
<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="1000000">
选择文件:<input type="file" name="myfile">
<input type="submit" value="上传文件">
</form>
</body>
</html>


upload2.html(多文件上传)

<html>
<head>
<title>多文件上传</title>
</head>
<body>
<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="1000000">
选择文件1:<input type="file" name="myfile[]"><br>
选择文件2:<input type="file" name="myfile[]"><br>
选择文件3:<input type="file" name="myfile[]"><br>
<input type="submit" value="上传文件">
</form>
</body>
</html>


upload.php

<?php
require "fileupload.class.php";
$up=new FileUpload;
$up ->set('path','./newpath/')
->set('size',1000000)
->set('allowtype',array('gif','jpg','png'))
->set('israndname',false);
if($up->upload('myfile')){
print_r($up->getFileName());
}
else{
print_r($up->getErrorMsg());
}
?>


fileupload.class.php

<?php
class FileUpload{
private $path="./uploads";
private $allowtype=array('jpg','gif','png');
private $maxsize=1000000;
private $israndname=true;
private $originName;
private $tmpFileName;
private $fileType;
private $fileSize;
private $newFileName;
private $errorNum=0;
private $errorMess="";

function set($key,$val){
$key=strtolower($key);
if(array_key_exists($key,get_class_vars(get_class($this)))){
$this->setOption($key,$val);
}
return $this;
}

function upload($fileField){
$return=true;
if(!$this->checkFilePath()){
$this->errorMess=$this->getError();
return false;
}
$name=$_FILES[$fileField]['name'];
$tmp_name=$_FILES[$fileField]['tmp_name'];
$size=$_FILES[$fileField]['size'];
$error=$_FILES[$fileField]['error'];
if(is_Array($name)){
$errors=array();
for($i=0;$i<count($name);$i++){
if($this->setFiles($name[$i],$tmp_name[$i],$size[$i],$error[$i])){
if(!$this->checkFileSize()||!$this->checkFileType()){
$errors[]=$this->getError();
$return=false;
}
}
else{
$errors[]=$this->getError();
$return=false;
}
if(!$return){
$this->setFiles();
}
}
if($return){
$fileNames=array();
for($i=0;$i<count($name);$i++){
if($this->setFiles($name[$i],$tmp_name[$i],$size[$i],$error[$i])){
$this->setNewFileName();
if(!$this->copyFile()){
$errors[]=$this->getError();
$return=false;
}
$fileNames[]=$this->newFileName;
}
}
$this->newFileName=$fileNames;
}
$this->errorMess=$errors;
return $return;
}
else{
if($this->setFiles($name,$tmp_name,$size,$error)){
if($this->checkFileSize()&&$this->checkFileType()){
$this->setNewFileName();
if($this->copyFile()){
return true;
}
else{
$return=false;
}
}
else{
$return=false;
}
}
else{
$return=false;
}
if(!$return){
$this->errorMess=$this->getError();
}
return $return;
}
}

public function getFileName(){
return $this->newFileName;
}

public function getErrorMsg(){
return $this->errorMess;
}

private function getError(){
$str="上传文件<font color='red'>{$this->originName}</font>时出错:";
switch($this->errorNum){
case 4:
$str.="没有文件被上传";
break;
case 3:
$str.="文件只有部分被上传";
break;
case 2:
$str.="上传的文件大小超过了HTML表单中MAX_FILE_SIZE选项指定的值";
break;
case 1:
$str.="上传的文件超过了php.ini中的upload_max_filesize选定限制的值";
break;
case -1:
$str.="未允许类型";
break;
case -2:
$str.="文件过大,上传的文件不能超过{$this->maxsize}个字节";
break;
case -3:
$str.="上传失败";
break;
case -4:
$str.="建立存放上传文件目录失败,请重新指定上传目录";
break;
case -5:
$str.="必须指定上传文件的路径";
break;
default:
$str.="未知错误";
//break;
}
return $str.'<br>';
}

private function setFiles($name="",$tmp_name="",$size=0,$error=0){
$this->setOption('errorNum',$error);
if($error){
return false;
}
$this->setOption('originName',$name);
$this->setOption('tmpFileName',$tmp_name);
$aryStr=explode(".",$name);
$this->setOption('fileType',strtolower($aryStr[count($aryStr)-1]));
$this->setOption('fileSize',$size);
return true;
}

private function setOption($key,$val){
$this->$key=$val;
}

private function setNewFileName(){
if($this->israndname){
$this->setOption('newFileName',$this->proRandName());
}
else{
$this->setOption('newFileName',$this->originName);
}
}

private function checkFileType(){
if(in_array(strtolower($this->fileType),$this->allowtype)){
return true;
}
else{
$this->setOption('errorNum',-1);
return false;
}
}

private function checkFileSize(){
if($this->fileSize>$this->maxsize){
$this->setOption('errorNum',-2);
return false;
}
else{
return true;
}
}

private function checkFilePath(){
if(empty($this->path)){
$this->setOption('errorNum',-5);
return false;
}
if(!file_exists($this->path)||!is_writable($this->path)){
if(!@mkdir($this->path,0755)){
$this->setOption('errorNum',-4);
return false;
}
}
return true;
}

private function proRandName(){
$fileName = date('YmdHis')."_".rand(100,999);
return $fileName.'.'.$this->fileType;
}

private function copyFile(){
if(!$this->errorNum){
$path=rtrim($this->path,'/').'/';
$path.=$this->newFileName;
if(@move_uploaded_file($this->tmpFileName,$path)){
return true;
}
else{
$this->setOption('errorNum',-3);
return false;
}
}
else{
return false;
}
}
}
?>


结果如下：







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