A very classic PHP file upload class sharing,

File upload is a common function in project development, but the process of file upload is relatively cumbersome, as long as Wherever files are uploaded, these complex codes need to be written. In order to reduce the difficulty of writing functions in each development and to save development time, we usually encapsulate these repeatedly used pieces of code into a class.

<&#63;php 
/** 
 +----------------------------------------------------------------------------- 
 * 文件上傳類 
 +----------------------------------------------------------------------------- 
 * @author Administrator 
 +----------------------------------------------------------------------------- 
 */ 
 class FileUpload{ 
   
  private $filepath;  //保存路徑 
  private $allowtype=array('gif','jpg','jpeg','png','txt'); 
  private $maxsize=1000000;  //最大允許上傳大小 
  private $israndname=true; //是否隨機 
  private $orginame; //原始文件名 
  private $tmpname;  //臨時文件名 
  private $newname;  //新文件名 
  private $filetype; //文件類型  
  private $filesize; //文件大小 
  private $errornum=''; //錯誤號 
  private $errormsg; //錯誤信息 
/** 
 +------------------------------------------------------------------------------ 
 *構造函數(shù) 
 +------------------------------------------------------------------------------ 
 * @param string $savepath  保存路徑 
 * @param string $allowtype 允許類型 
 * @param string $maxsize  允許大小 
 * 
 +------------------------------------------------------------------------------ 
 */    
  function __construct($option=array()){ 
     foreach ($option as $key=>$value){ 
        
      if (!in_array($key,get_class_vars(get_class($this)))){ 
        continue; 
       } 
      $this->setOption($key, $value);  
     } 
  } 
  function uploadfile($field) { 
     $return=true; 
    if (!$this->CheckPath()) { 
      $this->errormsg=$this->geterrorNum(); 
      return false; 
    } 
    $name=$_FILES[$field]['name']; 
    $tmpname=$_FILES[$field]['tmp_name']; 
    $filesize=$_FILES[$field]['size']; 
    $error=$_FILES[$field]['error'];  
     if (is_array($name)) { 
      $errors=array(); 
       for ($i=0;$i<count($name);$i++){ 
        if ($this->getFile($name[$i],$tmpname[$i],$filesize[$i],$errors[$i])) { 
          if (!$this->CheckSize() && !$this->CheckType()) { 
            $errors=$this->getErrorNum(); 
            return false; 
            }                                 
        }else{ 
            $errors=$this->getErrorNum(); 
            return false; 
        } 
        if (!$return) { 
          $this->getFile(); 
        } 
       } 
       if ($return) { 
        $fileNames=array(); 
        for ($i=0;$i<count($name);$i++){ 
          if ($this->getFile($name[$i], $tmpname[$i], $filesize[$i], $filesize[$i])) { 
            $this->SetFileName(); 
            if (!$this->MoveFile()) { 
              $errors[]=$this->getErrorNum(); 
              $return=false; 
            }else{ 
              $fileNames[]=$this->getNewName(); 
            } 
          }         
        } 
        $this->newname=$fileNames; 
       } 
        $this->errormsg=$errors; 
        return $return; 
        
     }else{  
      if($this->getFile($name,$tmpname,filesize,$error)){ 
        if(!$this->CheckSize()){ 
          return false; 
        } 
        if(!$this->CheckType()){ 
          return false; 
        } 
         $this->SetFileName(); 
        if ($this->MoveFile()) { 
            return true; 
        }  
      }else{ 
      return false; 
      } 
        
      if (!$return) { 
      $this->setOption('ErrorNum', 0); 
      $this->errormsg=$this->geterrorNum(); 
      } 
     return $return;  
   } 
  } 
  /** 
   +------------------------------------------------------------------------ 
   *設置類屬性值函數(shù) 
   +------------------------------------------------------------------------ 
   * @param mix $key 
   * @param mix $value 
   */ 
  private function setOption($key,$value){ 
    $key=strtolower($key); 
    $this->$key=$value; 
  } 
  /** 
   +--------------------------------------------------------------------------- 
   * 獲取文件變量參數(shù)函數(shù) 
   +--------------------------------------------------------------------------- 
   * @param string $name 
   * @param string $tmp_name 
   * @param number $size 
   * @param number $error 
   */ 
  private function getFile($name,$tmpname,$filetype,$filesize,$error=0){  
     
    $this->setOption('TmpName', $tmpname); 
    $this->setOption('OrgiName', $name); 
    $arrstr=explode('.', $name); 
    $this->setOption('FileType', $arrstr[count($arrstr)-1]);      
    $this->setOption('FileSize', $filesize); 
    return true; 
  } 
  /** 
   +------------------------------------------------------------------------- 
   * 檢查上傳路徑函數(shù) 
   +------------------------------------------------------------------------- 
   * @return boolean 
   */ 
  private function CheckPath(){ 
    if(empty($this->filepath)){ 
      $this->setOption('ErrorNum', -5); 
      return false; 
    } 
    if (!file_exists($this->filepath)||!is_writable($this->filepath)) { 
       if (!@mkdir($this->filepath,0755)) { 
         $this->setOption('ErrorNum',-4); 
         return false; 
       } 
    } 
    return true; 
  } 
  private function Is_Http_Post(){ 
    if (!is_uploaded_file($this->tmpname)) { 
      $this->setOption('ErrorNum',-6);  
      return false; 
    }else{ 
      return true; 
    } 
  } 
  /** 
   +-------------------------------------------------------------------- 
   *檢查文件尺寸函數(shù) 
   +-------------------------------------------------------------------- 
   * @return boolean 
   */ 
  private function CheckSize(){ 
    if ($this->filesize>$this->maxsize) { 
      $this->setOption('ErrorNum', -2); 
      return false; 
    }else{ 
      return true; 
    } 
  } 
  /** 
   +--------------------------------------------------------------- 
   * 檢查文件類型函數(shù) 
   +--------------------------------------------------------------- 
   * @return boolean 
   */ 
  private function CheckType(){ 
    if (in_array($this->filetype, $this->allowtype)) { 
      return true; 
    }else{ 
      $this->setOption('ErrorNum', -1); 
      return false; 
    } 
  } 
  private function SetFileName(){ 
    if ($this->israndname) { 
      $this->setOption('NewName', $this->RandName()); 
    }else{ 
      $this->setOption('NewName',$this->orginame); 
    }  
  } 
  /** 
   +----------------------------------------------------------------- 
   * 獲取新文件名 
   +------------------------------------------------------------------ 
   */ 
  public function getNewName() { 
    return $this->newname; 
  } 
  private function RandName(){ 
    $rule=date("YmdHis").rand(0, 999); 
    return $rule.'.'.$this->filetype; 
  } 
  private function MoveFile(){ 
    if ($this->errornum) { 
      $filepath=rtrim($this->filaepath,'/').'/'; 
      $filepath.=$this->newname; 
      if (@move_uploaded_file($this->tmpname,$filepath)) { 
        return true; 
       }else{ 
        $this->errormsg=$this->setOption('ErrorNum',-3 ); 
       } 
    }else{ 
      return false; 
    } 
  } 
  /** 
   +---------------------------------------------------------------- 
   * 錯誤信息函數(shù) 
   +---------------------------------------------------------------- 
   * @return string 
   */ 
   function getErrorNum() { 
    $erstr="上傳文件<font color='red'>{$this->orginame}</font>出錯"; 
    switch ($this->errornum) { 
      case 4: 
       $erstr.="沒有文件被上傳"; 
        break; 
      case 3: 
       $erstr.="文件只被部分上傳"; 
        break; 
      case 2: 
       $erstr.="上傳文件超過了HTML表單MAX_FILE_SIZE指定的值"; 
        break; 
      case 1: 
       $erstr.="上傳文件超過了php.ini配置文件中upload_max_filesize的值"; 
        break; 
      case 0: 
       $erstr="上傳{$this->orginame}成功"; 
        break;        
      case -1: 
       $erstr="未允許的類型"; 
        break; 
      case -2: 
       $erstr.="文件過大，不能超過{$this->maxsize}個字節(jié)";  
        break; 
      case -3: 
       $erstr.="上傳失敗"; 
        break; 
      case -4: 
       $erstr="創(chuàng)建上傳目錄失敗，請重新指定上傳目錄"; 
        break; 
      case -5: 
       $erstr="未指定上傳路徑"; 
        break; 
      case -6: 
       $erstr="非法操作"; 
        break;                    
      default: 
       $erstr.="未知錯誤"; 
         
    } 
    return $erstr; 
  } 
 } 
&#63;> 

The above is the entire content of this article. I hope it will be helpful to everyone in learning PHP programming.