PHP之图片上传类实例代码(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>