<?php
phpinfo();
exit;
$pdf = './manual.pdf';
$fp_pdf = fopen($pdf, 'rb');
$img = new imagick();
// [0] can be used to set page number
$img->setResolution(300, 300);
$img->readImageFile($fp_pdf);
$img->setImageFormat("jpg");
$img->setImageCompression(imagick::COMPRESSION_JPEG);
$img->setImageCompressionQuality(90);
$img->setImageUnits(imagick::RESOLUTION_PIXELSPERINCH);
$data = $img->getImageBlob();
