php 处理文件上传
<?php
/**
* @todo : 处理文件上传
* @Author : yuguibin
* @date : 2014-03-20
*/
if(!empty($_FILES["file"]))
{
    $files = $_FILES["file"];//文件名称,file框的名称
    if(!empty($files['error'])){//错误信息
         switch ($files['error'])
            {
                case "1": $error = array('status'=>FALSE,'msg'=> "传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值");  break;
                case "2": $error = array('status'=>FALSE,'msg'=> "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值");  break;
                case "3": $error = array('status'=>FALSE,'msg'=> "文件只有部分被上传");  break;
                case "4": $error = array('status'=>FALSE,'msg'=> "没有文件被上传");   break;
                case "6": $error = array('status'=>FALSE,'msg'=> "找不到临时文件夹");  break;
                case "7": $error = array('status'=>FALSE,'msg'=> "文件写入失败");  break;
                default:  $error = array('status'=>FALSE,'msg'=> "未知错误");  break;
            }
             return $error;
    }
    $path = "upload/";//上传路径
    if(!file_exists($path))
    {
        if(! mkdir($path,0700))
        {
            $info = array("status"=>FALSE,"msg"=>"存放文件目录不存在");
            return $info;
        }
    }
    //允许上传的文件格式
    $extension = strtolower(end(explode("/",$files["type"])));
    $tp = array("gif","jpeg","jpg","png","bmp");
    if(!in_array($extension, $tp))
    {
        $info = array("status"=>FALSE,"msg"=>"文件格式错误");
        return $info;
    }
    $filename = $path.date("YmdHis").".".$extension;
    if(@move_uploaded_file($files["tmp_name"], $filename))
    {
        $info = array("status"=>TRUE,"msg"=>$filename);
        return $info;
    }
    else
    {
        $info = array("status"=>FALSE,"msg"=>"移动文件失败");
        return $info;
    }
}
?>