public function getPropHeight($width)
    {
        $ratio = (int) $width / $this->width;

        return $this->height * $ratio;
    }
public function getPropHeight($width)
    {
        $ratio = (int) $width / $this->width;

        return $this->height * $ratio;
    }
public function getPropHeight ( $ width ) { $ ratio = ( int ) $ width / $ this -> width ; return $ this -> height * $ ratio ; }
Gets proportional height of image from width value.

@access public
@param int $width
@return int
Gets proportional height of image from width value .