SIMPLE CLASS D'UPLOAD D'IMAGE

upload.class.php

class upload
{
private $img;
private $dir;

function __construct($img,$dir)
{
       $this->tmp_img = $_FILES[$img]['tmp_name'];
       $this->nom_img = $_FILES[$img]['name'];
       $this->type_img =$_FILES[$img]['type'];
	   $this->dossier=$dir;
}

function upload_image()
{
	if( !is_uploaded_file($this->tmp_img) )
    {   
	    $msg="vous avez rien uploader";
        return $msg;
    }
    elseif( !strstr($this->type_img, 'jpg') && !strstr($this->type_img, 'jpeg') && !strstr($this->type_img, 'bmp') && ! strstr($this->type_img, 'gif') )
    {
        $msg="le fichier n'est pas une image";
		return $msg;
    }
    elseif( !move_uploaded_file($this->tmp_img, $this->dossier . $this->nom_img) )
    {
	   $msg="impssible de copier le fichier";
       return $msg;
    }
	
	$msg="image envoyé";
	return $msg;
}
}//class

upload.php

session_start();
include "upload.class.php";
if(isset($_FILES['img']))
{
  
  $img='img';
  $dir='./dir/';
  $koko = new upload($img,$dir);
  $er= $koko->upload_image();
  
  $_SESSION['er']=$er;
  header("location: upload-img.php");
}