php - number of pages in a pdf file

Question

Does anyone know how I can count the number of pages in a pdf file using php? Thanks!

Answer 1

Based on R Ubben's answer I found the following PHP code to give good results:

function count_pages($pdfname) {
  $pdftext = file_get_contents($pdfname);
  $num = preg_match_all("//PageW/", $pdftext, $dummy);
  return $num;
}

W matches any non-alphanumeric character and excludes things like /Pages, /PageMode etc.