/**
* Get a preview thumbnail for a pdf
* @param string $blob
* @param integer $width
* @param integer $height
*
* @return blob
*/
public static function thumbnailPDF($blob, $width, $height)
{
try {
$im = new imagick();
$im->readimageblob($blob);
$im->setiteratorindex(0);
$im->setImageFormat("png");
$im->scaleimage($width, $height);
} catch (ImagickException $e) {
$im = new imagick();
$im->readimage(realpath(__DIR__ . '/media/default_pdf_logo.png'));
$im->scaleimage($width, $height);
}
return $im->getimageblob();
}