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Print PDF a File in PHP

Sample PHP code for using PDFTron SDK to print a PDF file using the currently selected default printer. It is possible to use this printing functionality in both client and server applications without dependence on any third party components.

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Step 2: Add the code:

// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
// Consult LICENSE.txt regarding license information.

 * The following sample is a used to illustrate how to print 
 * PDF document using currently selected default printer. In this sample, PDF::Print class 
 * is used to send data to the printer. 
 * Following this function is the more complex way of using PDFDraw directly.
 * The first example uses the new PDF::Print::StartPrintJob function to send a rasterization 
 * of the document with optimal compression to the printer.  If the OS is Windows 7, then the
 * XPS print path will be used to preserve vector quality.
 * The second example uses PDFDraw send unoptimized rasterized data via the GDI print path. 
 * If you would like to rasterize page at high resolutions (e.g. more than 600 DPI), you 
 * should use PDFRasterizer or PDFNet vector output instead of PDFDraw. 
	// Relative path to the folder containing test files.
	$input_path = getcwd()."/../../TestFiles/";
	$doc = new PDFDoc($input_path."tiger.pdf");

	// Set our PrinterMode options
	$printerMode = new PrinterMode();
	$printerMode->SetDPI(600); // regardless of ordering, an explicit DPI setting overrides the OutputQuality setting
	// If the XPS print path is being used, then the printer spooler file will
	// ignore the grayscale option and be in full color
	// $printerMode->SetNUp(2,1);
	// $printerMode->SetScaleType(PrinterMode::e_ScaleType_FitToOutputPage);

	// Print the PDF document to the default printer, using "tiger.pdf" as the document
	// name, send the file to the printer not to an output file, print all pages, set the printerMode
	// and don't provide a cancel flag.
	PDFPrint::StartPrintJob($doc, "", $doc->GetFileName(), "", null, $printerMode, null);