set_option("searchpath={" . $searchpath . "}"); /* This means we must check return values of load_font() etc. */ $p->set_option("errorpolicy=return"); if ($p->begin_document($outfile, "") == 0) throw new Exception("Error: " . $p->get_errmsg()); $p->set_info("Creator", "PDFlib Cookbook"); $p->set_info("Title", $title); /* Load the font. */ $font = $p->load_font("NotoSerif-Regular", "unicode", ""); if ($font == 0) throw new Exception("Error: " . $p->get_errmsg()); /* Load the image */ $image = $p->load_image("auto", $imagefile, "page=1"); if ($image == 0) throw new Exception("Error: " . $p->get_errmsg()); /* Start page */ $p->begin_page_ext(0, 0, "width=a4.width height=a4.height"); /* Place the image */ $p->fit_image($image, 0, 0, "boxsize={595 842} fitmethod=meet"); $p->close_image($image); /* Save the current graphics state */ $p->save(); /* Set the text rendering mode to "invisible text" */ $p->set_text_option("textrendering=3"); /* Output the text invisibly on top of the image with the rendering * mode set to "invisible text" above. (The text can be output * on top of the image or below the image.) The following text * resembles text retrieved from the scanned page via OCR. */ $p->setfont($font, 21); $p->fit_textline("PDFlib GmbH München, Germany", 130, 750, ""); $p->fit_textline("www.pdflib.com", 215, 710, ""); $p->setfont($font, 28); $p->fit_textline("Tutorial for", 120, 480, ""); $p->fit_textline("PDFlib, PDI, and PPS", 120, 445, ""); $p->setfont($font, 21); $p->fit_textline("General Edition for", 195, 125, ""); $p->fit_textline("Cobol, C, C++, Java, Perl", 165, 95, ""); $p->fit_textline("PHP, Phyton, RPG, Ruby, and Tcl", 140, 70, ""); /* Restore the current graphics state */ $p->restore(); $p->end_page_ext(""); $p->end_document(""); $buf = $p->get_buffer(); $len = strlen($buf); header("Content-type: application/pdf"); header("Content-Length: $len"); header("Content-Disposition: inline; filename=invisible_text.pdf"); print $buf; } catch (PDFlibException $e) { echo("PDFlib exception occurred:\n". "[" . $e->get_errnum() . "] " . $e->get_apiname() . ": " . $e->get_errmsg() . "\n"); } catch (Throwable $e) { echo("PHP exception occurred: " . $e->getMessage() . "\n"); } $p = 0; ?>