Get the number of pages in a PDF document

Question

This question is for referencing and comparing. The solution is the accepted answer below.

Many hours have I searched for a fast and easy, but mostly a

Answer 1

Simplest of all is using ImageMagick

here is a sample code

$image = new Imagick();
$image->pingImage('myPdfFile.pdf');
echo $image->getNumberImages();

otherwise you can also use PDF libraries like MPDF or TCPDF for PHP