PHP/PDF/pdf place image

Embedding Images in PDF Documents

   <source lang="html4strict">

<?php

   define("PAGE_WIDTH", 612);
   define("PAGE_HEIGHT", 792);
   $pdf = pdf_new();
   pdf_begin_document($pdf, "", "");
   pdf_begin_page($pdf, PAGE_WIDTH, PAGE_HEIGHT);
   $gd_logo = imagecreatefromjpeg("logo.jpg");
   $logo = pdf_open_memory_image($pdf, $gd_logo);
   $logo_w = pdf_get_value($pdf, "imagewidth", $logo);
   imagedestroy($gd_logo);
   pdf_place_image($pdf, $logo, PAGE_WIDTH/2 - ($logo_w/2), PAGE_HEIGHT/2, 1.0);
   pdf_close_image($pdf, $logo);
   pdf_end_page($pdf);
   pdf_end_document($pdf, "");
   $data = pdf_get_buffer($pdf);
   header("Content-type: application/pdf");
   header("Content-disposition: inline; filename=example1.pdf");
   header("Content-length: " . strlen($data));
   echo $data;

?>

 </source>