function pdf2png($pdf, $filename, $page=0) {          
            if (!extension_loaded('imagick')) {
                exit('no imagick');
                return false;                
            } 
            if (!file_exists($pdf)) {
                return false;
            }  
            $im = new Imagick();
            $im->setResolution(120, 120);
            $im->setCompressionQuality(100);
            $im->readImage($pdf . "[" . $page . "]");
            $im->setImageFormat('png');
            $im->writeImage($filename);
            $im->readImage($filename);
            $im->resizeImage(120, 150, Imagick::FILTER_LANCZOS, 1);
            $im->writeImage($filename);
            return $filename;
        }