Split PDF pages in PHP

To split a PDF document into multiple pages.

$doc = new PDFDoc($filename);
$page_num = $doc->GetPageCount();
for ($i = 1; $i <= $page_num; ++$i)
{
  $new_doc = new PDFDoc();
  $new_doc->InsertPages(0, $doc, $i, $i, PDFDoc::e_none);
  $new_doc->Save($output_filename."_split_page_".$i.".pdf", SDFDoc::e_linearized);
  $new_doc->Close();
}

Merge, Copy, Delete, and Rearrange PDF Pages
Full code sample which illustrates how to copy pages from one document to another, how to delete, and rearrange pages and how to use ImportPages().