PHP之图片上传类（加了缩略图）

<form action="<?php $_SERVER['PHP_SELF']; ?>" enctype="multipart/form-data" method="post" ><input type="text" name="name" /><input type="file" name="file" /><input type="submit"  name='submit' value="提交" ></form>

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2016/6/28
 * Time: 21:04
 */

class upload{
      protected  $fileMine;//文件上传类型
      protected  $filepath;//文件上传路径
      protected  $filemax;//文件上传大小
      protected  $fileExt;//文件上传格式
      protected  $filename;//文件名
      protected  $fileerror;//文件出错设置
      protected  $fileflag;//文件检测
      protected  $fileinfo; //FILES
      protected  $ext;  //文件扩展
      protected  $path;

    //文件上传
    public function __construct($filename="file",$filemax=20000000,$filepath="./Uploads",$fileflag=true,$fileExt=array('jpg','exe'),$fileMine=array('image/jpeg'))
    {
        $this->filename=$filename;
        $this->fileinfo=$_FILES[$this->filename];
        $this->filemax=$filemax;
        $this->filepath=$filepath;
        $this->fileflag=$fileflag;
        $this->fileExt=$fileExt;
        $this->fileMine=$fileMine;

        //var_dump($this->filename);

    }

    //错误判断
    public function UpError(){

            if($this->fileinfo['error']>0){
                switch($this->fileinfo['error'])
                {
                    case 1:
                    $this->fileerror="上传文件大小超过服务器允许上传的最大值，php.ini中设置upload_max_filesize选项限制的值 ";
                        break;
                    case 2:
                        $this->fileerror="上传文件大小超过HTML表单中隐藏域MAX_FILE_SIZE选项指定的值";
                        break;
                    case 3:
                        $this->fileerror="文件部分被上传";
                        break;
                    case 4:
                        $this->fileerror="没有选择上传文件";
                        break;
                    case 5:
                        $this->fileerror="未找到临时目录";
                        break;
                    case 6:
                        $this->fileerror="文件写入失败";
                        break;
                    case 7:
                        $this->fileerror="php文件上传扩展没有打开 ";
                        break;
                    case 8:
                        $this->fileerror="";
                        break;

                }
                return false;
            }
            return true;

    }

    //检测文件类型
    public function UpMine(){
        if(!in_array($this->fileinfo['type'],$this->fileMine)) {
            $this->error="文件上传类型不对";
            return false;
        }
        return true;

    }
    //检测文件格式
    public function UpExt(){
        $this->ext=pathinfo($this->fileinfo['name'],PATHINFO_EXTENSION);
        //var_dump($ext);
        if(!in_array($this->ext,$this->fileExt)){
            $this->fileerror="文件格式不对";
            return false;
        }
       return true;
    }
    //检测文件路径
    public function UpPath(){
        if(!file_exists($this->filepath)){
            mkdir($this->filepath,0777,true);
        }
    }
    //检测文件大小
    public function UpSize(){
        $max=$this->fileinfo['size'];
        if($max>$this->filemax){
            $this->fileerror="文件过大";
            return false;
        }
        return true;
    }
    //检测文件是否HTTP
    public function UpPost(){
        if(!is_uploaded_file($this->fileinfo['tmp_name'])){
            $this->fileerror="恶意上偿还";
            return false;
        }
        return true;
    }
    //文件名防止重复
    public function Upname(){
        return md5(uniqid(microtime(true),true));
    }

    //图片缩略图
    public function Smallimg($x=100,$y=100){
        $imgAtt=getimagesize($this->path);
        //图像宽，高，类型
        $imgWidth=$imgAtt[0];
        $imgHeight=$imgAtt[1];
        $imgext=$imgAtt[2];
        //等比列缩放

        if(($x/$imgWidth)>($y/$imgHeight)){
            $bl=$y/$imgHeight;
        }else{
            $bl=$x/$imgWidth;
        }
        $x=floor($imgWidth*$bl);  //缩放后
        $y=floor($imgHeight*$bl);
        $images=imagecreatetruecolor($x,$y);
        $big=imagecreatefromjpeg($this->path);
        imagecopyresized($images,$big,0,0,0,0,$x,$y,$imgWidth,$imgWidth);
        switch($imgext){
            case 1:
                $imageout=imagecreatefromgif($this->path);
                break;
            case 2:
                $imageout=imagecreatefromjpeg($this->path);
                break;
            case 3:
                $imageout=imagecreatefromgif($this->path);
                break;
        }
        $im=imagejpeg($images,$this->path);




    }

    //文件双传
    public function uploads()
    {
        if($this->UpError()&&$this->UpMine()&&$this->UpExt()&&$this->UpSize()&&$this->UpPost()){
            $this->UpPath();
            $names=$this->Upname();
            $this->path=$this->filepath.'/'. $names.'.'.$this->ext;

            if(move_uploaded_file($this->fileinfo['tmp_name'], $this->path)){
                return  $this->path;
            }else{
                $this->fileerror="上传失败";
            }
        }else{
            exit("<b>".$this->fileerror."</b>");
        }
    }





}




?>

<?php 
   header("content-type:imagejpeg");
header("Content-type:text/html;charset=utf-8");
  require 'list.php';
  $u=new upload();
  $a=$u->uploads();

  $c=$u->Smallimg();
echo "<img src={$a} />";
echo "<img src={$c} />";

?>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Examples</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
</head>
<body>
    <form action="ce.php" enctype="multipart/form-data" method="post" >
    <input type="text" name="name" /><input type="file" name="file" />
    <input type="submit"  name='submit' value="提交" >
    </form>
</body>
</html>