public function upload(string $sFile)
	{
		if ($_FILES[$sFile]['error'] > 0) {

			$this->_sError = "Error while the upload";
			return false;
		}

		if ($_FILES[$sFile]['size'] > $this->_iMaxFile) {

			$this->_sError = "The file is too big";
			return false;
		}

		$sExtension = strtolower(substr(strrchr($_FILES[$sFile]['name'], '.'), 1));

		if (count($this->_aAllowExtension) > 0 && !in_array($sExtension ,$this->_aAllowExtension)) {

			$this->_sError = "The extension is not good";
			return false;
		}

		$sPath = str_replace('bundles'.DIRECTORY_SEPARATOR.'lib',
			'data'.DIRECTORY_SEPARATOR.'upload'.DIRECTORY_SEPARATOR, __DIR__);

		if ($this->_sExtension === null) { $this->setExtension($sExtension); }

		if ($this->_sName) { $sName = $sPath.$this->_sName.'.'.$this->_sExtension; }
		else { $sName = $sPath.md5(uniqid(rand(), true)).'.'.$this->_sExtension;}

		if ($this->_bProportion === true && ($this->_iWidth || $this->_iHeight)) {

			$aImageSizes = getimagesize($_FILES[$sFile]['tmp_name']);

			$fRatio = min($aImageSizes[0] / $this->_iWidth, $aImageSizes[1] / $this->_iHeight);
    		$iHeight =  $aImageSizes[1] / $fRatio;
    		$iWidth =  $aImageSizes[0] / $fRatio;
    		$fY = ($iHeight - $this->_iHeight) / 2 * $fRatio;
    		$fX = ($iWidth - $this->_iWidth) / 2 * $fRatio;

			$rNewImage = imagecreatefromjpeg($_FILES[$sFile]['tmp_name']);

			$rNewImgTrueColor = imagecreatetruecolor($this->_iWidth , $this->_iHeight);
			imagecopyresampled($rNewImgTrueColor , $rNewImage, 0, 0, $fX, $fY, $this->_iWidth, $this->_iHeight, $iWidth * $fRatio - $fX * 2, $iHeight * $fRatio - $fY * 2);

			imagejpeg($rNewImgTrueColor , $sName, 100);
		}
		else {

			$bResultat = move_uploaded_file($_FILES[$sFile]['tmp_name'], $sName);

			if ($bResultat) { return true; }
		}


	}