PHP之图片上传类实例代码(加了缩略图)

有缩略图功能 但是 感觉不全面，而且有点问题，继续学习，将来以后修改下

<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>

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