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>

以上这篇PHP之图片上传类实例代码(加了缩略图)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。