真正支持单文件和多文件上传类代码，修正了$_FILES[$field]['name']中的$field不能用变量只能和表单中的文件名name="userfile"一致的缺点$_FILES['userfile']['name']，这里<input type="file" name="userfile"> 中的文件名可以随意取。
//index.htm
1、单文件上传
<form method="post" action="./upload.php" name="frmUpload" enctype="multipart/form-data" >
<input type="file" name="userfile" style="WIDTH: 282px">
<input type="submit" align="center" name="upfiles" value="确定"></form>
2、多文件上传
<form method="post" action="./upload.php" name="frmUpload" enctype="multipart/form-data" >
<input type="file" name="userfile[]" style="WIDTH: 282px">
<input type="file" name="userfile[]" style="WIDTH: 282px">
<input type="file" name="userfile[]" style="WIDTH: 282px">
<input type="submit" align="center" name="upfiles" value="确定">
</form>
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//upload.php
<?php
class File_upload{
public $upload_path='./upload/';//上传文件的路径
public $allow_type=array();//允许上传的文件类型
public $max_size='20480';//允许的最大文件大小
public $overwrite=false;//是否设置成覆盖模式
public $renamed=false;//是否直接使用上传文件的名称，还是系统自动命名
/**
* 私有变量
*/
private $upload_file=array();//保存上传成功文件的信息
private $upload_file_num=0;//上传成功文件的数目
private $succ_upload_file=array();//成功保存的文件信息
/**
* 构造器
*
* @param string $upload_path
* @param string $allow_type
* @param string $max_size
*/
public function __construct($upload_path='./upload/',$allow_type='jpg|bmp|png|gif|jpeg',$max_size='204800')
{
$this->set_upload_path($upload_path);
$this->set_allow_type($allow_type);
$this->max_size=$max_size;
$this->get_upload_files();
}
/**
* 设置上传路径，并判定
*
* @param string $path
*/
public function set_upload_path($path)
{
if(file_exists($path)){
if(is_writeable($path)){
$this->upload_path=$path;
}else{
if(@chmod($path,'0666'))
$this->upload_path=$path;
}
}else{
if(@mkdir($path,'0666')){
$this->upload_path=$path;
}
}
}
//设置上传文件类型
public function set_allow_type($types){
$this->allow_type=explode("|",$types);
}
//上传文件
public function get_upload_files()
{
foreach ($_FILES AS $key=>$field)
{
$this->get_upload_files_detial($key);
}
}
//上传文件数据存放到数组中
public function get_upload_files_detial($field){
if(is_array($_FILES["$field"]['name']))
{
for($i=0;$i<count($_FILES[$field]['name']);$i++)
{
if(0==$_FILES[$field]['error'][$i])
{
$this->upload_file[$this->upload_file_num]['name']=$_FILES[$field]['name'][$i];
$this->upload_file[$this->upload_file_num]['type']=$_FILES[$field]['type'][$i];
$this->upload_file[$this->upload_file_num]['size']=$_FILES[$field]['size'][$i];
$this->upload_file[$this->upload_file_num]['tmp_name']=$_FILES[$field]['tmp_name'][$i];
$this->upload_file[$this->upload_file_num]['error']=$_FILES[$field]['error'][$i];
$this->upload_file_num++;
}
}
}
else {
if(0==$_FILES["$field"]['error'])
{
$this->upload_file[$this->upload_file_num]['name']=$_FILES["$field"]['name'];
$this->upload_file[$this->upload_file_num]['type']=$_FILES["$field"]['type'];
$this->upload_file[$this->upload_file_num]['size']=$_FILES["$field"]['size'];
$this->upload_file[$this->upload_file_num]['tmp_name']=$_FILES["$field"]['tmp_name'];
$this->upload_file[$this->upload_file_num]['error']=$_FILES["$field"]['error'];
$this->upload_file_num++;
}
}
}
/**
* 检查上传文件是构满足指定条件
*
*/
public function check($i)
{
if(!empty($this->upload_file[$i]['name'])){
//检查文件大小
if($this->upload_file[$i]['size']>$this->max_size*1024)$this->upload_file[$i]['error']=2;
//设置默认服务端文件名
$this->upload_file[$i]['filename']=$this->upload_path.$this->upload_file[$i]['name'];
//获取文件路径信息
$file_info=pathinfo($this->upload_file[$i]['name']);
//获取文件扩展名
$file_ext=$file_info['extension'];
//检查文件类型
if(!in_array($file_ext,$this->allow_type))$this->upload_file[$i]['error']=5;
//需要重命名的
if($this->renamed){
list($usec, $sec) = explode(" ",microtime());
$this->upload_file[$i]['filename']=$sec.substr($usec,2).'.'.$file_ext;
unset($usec);
unset($sec);
}
//检查文件是否存在
if(file_exists($this->upload_file[$i]['filename'])){
if($this->overwrite){
@unlink($this->upload_file[$i]['filename']);
}else{
$j=0;
do{
$j++;
$temp_file=str_replace('.'.$file_ext,'('.$j.').'.$file_ext,$this->upload_file[$i]['filename']);
}while (file_exists($temp_file));
$this->upload_file[$i]['filename']=$temp_file;
unset($temp_file);
unset($j);
}
}
//检查完毕
} else $this->upload_file[$i]['error']=6;
}
/**
* 上传文件
*
* @return true
*/
public function upload()
{
$upload_msg='';
for($i=0;$i<$this->upload_file_num;$i++)
{
if(!empty($this->upload_file[$i]['name']))
{
//检查文件
$this->check($i);
if (0==$this->upload_file[$i]['error'])
{
//上传文件
if(!@move_uploaded_file($this->upload_file[$i]['tmp_name'],$this->upload_file[$i]['filename']))
{
$upload_msg.='上传文件'.$this->upload_file[$i]['name'].' 出错:'.$this->error($this->upload_file[$i]['error']).'!<br>';
}else
{
$this->succ_upload_file[]=$this->upload_file[$i]['filename'];
$upload_msg.='上传文件'.$this->upload_file[$i]['name'].' 成功了<br>';
}
}else $upload_msg.='上传文件'.$this->upload_file[$i]['name'].' 出错:'.$this->error($this->upload_file[$i]['error']).'!<br>';
}
}
echo $upload_msg;
}
//错误信息
public function error($error)
{
switch ($error) {
case 1:
return '文件大小超过php.ini 中 upload_max_filesize 选项限制的值';
break;
case 2:
return '文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值';
break;
case 3:
return '文件只有部分被上传';
break;
case 4:
return '没有文件被上传';
break;
case 5:
return '这个文件不允许被上传';
break;
case 6:
return '文件名为空';
break;
default:
return '出错';
break;
}
}
//获取成功的数据信息为数组(备用)
public function get_succ_file(){
return $this->succ_upload_file;
}
}
$upload=new File_upload('./upload/','jpg|bmp|png|gif|jpeg');
$upload->upload();
$t=$upload->get_succ_file();
print_r($t);
?>