PHP

Ex.

Upload.class.php
<?php
 
class MyUpload{    

  var $cls_upload_dir = "";         // Directory to upload to.
  var $cls_filename = "";           // Name of the upload file.
  var $cls_tmp_filename = "";       // TMP file Name Upload.
  var $cls_arr_ext_accepted = array(".gif", ".jpg", ".jpeg", ".png" );
  var $cls_file_rename_to = '';     // New name for the file after upload.

  function MyUpload($file_name, $tmp_file_name, 
     $file_size, $file_rename_to = ''){
  
    $this->cls_filename = $file_name;
    $this->cls_tmp_filename = $tmp_file_name;
    $this->cls_filesize = $file_size;
    $this->cls_file_rename_to = $file_rename_to;
  }

 function isUploadedFile(){
   if(is_uploaded_file( $this->cls_tmp_filename) != true){
      return "IS_UPLOADED_FILE_FAILURE";
   } else {
      return 1;
   }
 }

  function checkExtensionDir($dir){
    
    if(!is_writable($dir) ){
      return "DIRECTORY_FAILURE";
    } else { 
      $this->cls_upload_dir = $dir;
      return 1;
    }
  }

  function checkExtension(){

    if(!in_array(strtolower(strrchr($this->cls_filename, ".")), 
         $this->cls_arr_ext_accepted)){
      return "EXTENSION_FAILURE";
    } else {
      return 1;
    }
  }

  function move(){
    
     if(move_uploaded_file($this->cls_tmp_filename, 
        $this->cls_upload_dir . $this->cls_filename) == false){
        return "MOVE_UPLOADED_FILE_FAILURE";
     } else {
        return 1;
     }
  }

  function checkFileExists(){
    
    if(file_exists($this->cls_upload_dir . $this->cls_filename) ){
      return "FILE_EXISTS_FAILURE";
    } else {
      return 1;
    }
  } 

  function upload( $dir ){
  
    $ret = $this->checkExtension();   //ตรวจสอบนามสกุลไฟล์
    if( $ret != 1 ){
      return $this->resultUpload($ret);
    }   
	
    $ret = $this->isUploadedFile();    //ตรวจสอบไฟล์
    if($ret != 1){
      return $this->resultUpload($ret);
    }

    $ret = $this->checkExtensionDir($dir);	//ตรวจสอบ Dirtory
    if($ret != 1){
      return $this->resultUpload($ret);
    }
    
      $ret = $this->checkFileExists();	//ตรวจสอบไฟล์ซ้ำ
      if($ret != 1){
        return $this->resultUpload( $ret );    
      }

    $ret = $this->move();		//ทำการ Upload 
    if( $ret != 1 ){
      return $this->resultUpload($ret);    
    }
    return $this->resultUpload("SUCCESS");	  //ทำได้สำเร็จ
  }

  function resultUpload($flag){

    switch($flag){
      case "IS_UPLOADED_FILE_FAILURE" : 
	  return "The file could not be uploaded 
	     to the tmp directory of the web server.";
        break;
      case "DIRECTORY_FAILURE" : 
	  return "The file could not be uploaded, 
	     the directory is not writable.";
        break;
      case "EXTENSION_FAILURE" : 
	  return "The file could not be uploaded, 
	     this type of file is not accepted.";
        break;
      case "FILE_SIZE_FAILURE" : 
	  return "The file could not be uploaded, 
	     this file is too big.";
        break;
      case "FILE_EXISTS_FAILURE" :  
	  return "The file could not be uploaded, 
	     a file with the same name already exists.";
        break;
      case "MOVE_UPLOADED_FILE_FAILURE" : 
	  return "The file could not be uploaded, 
	     the file could not be copied to destination directory.";
        break;
      case "SUCCESS" :
	  return "Upload was successful!";
        break;
    }
  }

}; // end class

?> 


การเรียกใช้
<?php
  include_once("Upload.class.php");

if( $_POST['submit'] != '' ){
  $up = new MyUpload($_FILES['image']['name'], 
       $_FILES['image']['tmp_name'], $_FILES['image']['size'], 
	"thisname");
  $result = $up->upload( "./" );
  print $result;
}

print "<br><br> \n";
print "<form enctype='multipart/form-data' 
     method='post' action='". $PHP_SELF ."'> \n";
print "<input type='file' name='image'> \n";
print "<input type='submit' value='Upload' name='submit'> \n";
print "</form> \n";

?> 

  ที่มา:=> จำไม่ได้ว่านำมาจากที่ใด  PHP ที่ทดสอบ v4.3.4