set density parameter for imagick with php

Question

I want to convert a pdf page to a png image with Imagick.

I tried with PHP, but the image quality was very low.
When I tried with command line, the result was pe

Answer 1

From the manual http://php.net/manual/en/imagick.setresolution.php

Imagick::setResolution() must be called before loading or creating an image.

See this answer Pdf to image using php-imagick api