===PHP PDF Lib===
PDFLIB is not free libre open source so you may prefer to use another PhpPdf library instead

%%(php)
$p = new PDFLib;

$f = $p->begin_document('','');

$fh = $p->open_pdi_document($file,'');

$pages = $p->pcos_get_number($fh, "length:pages");

$w = $p->pcos_get_number($fh, "pages[0]/width");

$h = $p->pcos_get_number($fh, "pages[0]/height");

$pa = $p->open_pdi_page($fh, 1, '');

$p->close_pdi_page($pa);

$p->close_pdi_document($fh);
%%

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REFERRERS
{{backlinks}}