PHP HTML to PDF converter

<?php
//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2022 by PDFTron Systems Inc. All Rights Reserved.
// Consult LICENSE.txt regarding license information.
//---------------------------------------------------------------------------------------
if(file_exists("../../../PDFNetC/Lib/PDFNetPHP.php"))
include("../../../PDFNetC/Lib/PDFNetPHP.php");
include("../../LicenseKey/PHP/LicenseKey.php");

// Relative path to the folder containing the test files.
$input_path = getcwd()."/../../TestFiles/";
$output_path = $input_path."Output/";

//---------------------------------------------------------------------------------------
// The following sample illustrates how to convert HTML pages to PDF format using
// the HTML2PDF class.
// 
// 'pdftron.PDF.HTML2PDF' is an optional PDFNet Add-On utility class that can be 
// used to convert HTML web pages into PDF documents by using an external module (html2pdf).
//
// html2pdf modules can be downloaded from http://www.pdftron.com/pdfnet/downloads.html.
//
// Users can convert HTML pages to PDF using the following operations:
// - Simple one line static method to convert a single web page to PDF. 
// - Convert HTML pages from URL or string, plus optional table of contents, in user defined order. 
// - Optionally configure settings for proxy, images, java script, and more for each HTML page. 
// - Optionally configure the PDF output, including page size, margins, orientation, and more. 
// - Optionally add table of contents, including setting the depth and appearance.
//---------------------------------------------------------------------------------------

	$output_path = "../../TestFiles/Output/html2pdf_example";
	$host = "https://www.pdftron.com";
	$page0 = "/";
	$page1 = "/support";
	$page2 = "/blog";

	// The first step in every application using PDFNet is to initialize the 
	// library and set the path to common PDF resources. The library is usually 
	// initialized only once, but calling Initialize() multiple times is also fine.
	PDFNet::Initialize($LicenseKey);
	PDFNet::GetSystemFontList();    // Wait for fonts to be loaded if they haven't already. This is done because PHP can run into errors when shutting down if font loading is still in progress.

	// For HTML2PDF we need to locate the html2pdf module. If placed with the 
	// PDFNet library, or in the current working directory, it will be loaded
	// automatically. Otherwise, it must be set manually using HTML2PDF.SetModulePath.
	HTML2PDF::SetModulePath("./../../../PDFNetC/Lib");
	if(!HTML2PDF::IsModuleAvailable()) {
		echo "Unable to run HTML2PDFTest: PDFTron SDK HTML2PDF module not available.\n
			---------------------------------------------------------------\n
			The HTML2PDF module is an optional add-on, available for download\n
			at https://www.pdftron.com/. If you have already downloaded this\n
			module, ensure that the SDK is able to find the required files\n
			using the HTML2PDF::SetModulePath() function.\n";
		return;
	}

	//--------------------------------------------------------------------------------
	// Example 1) Simple conversion of a web page to a PDF doc. 

	$doc = new PDFDoc();

	// now convert a web page, sending generated PDF pages to doc
	$converter = new HTML2PDF();
	$converter->InsertFromURL($host.$page0);
	if ( $converter->Convert($doc) ) {
		$doc->Save($output_path."_01.pdf", SDFDoc::e_linearized);
	}
	else {
		echo printf("Conversion failed. HTTP Code: %d\n%s", $converter->GetHTTPErrorCode(), $converter->GetLog());
	}
	$doc->Close();

	//--------------------------------------------------------------------------------
	// Example 2) Modify the settings of the generated PDF pages and attach to an
	// existing PDF document. 

	// open the existing PDF, and initialize the security handler
	$doc = new PDFDoc("../../TestFiles/numbered.pdf");
	$doc->InitSecurityHandler();

	// create the HTML2PDF converter object and modify the output of the PDF pages
	$converter = new HTML2PDF();
	$converter->SetPaperSize(PrinterMode::e_11x17);

	// insert the web page to convert
	$converter->InsertFromURL($host.$page0);

	// convert the web page, appending generated PDF pages to doc
	if ( $converter->Convert($doc) ) {
		$doc->Save($output_path."_02.pdf", SDFDoc::e_linearized);
	}
	else {
		echo printf("Conversion failed. HTTP Code: %d\n%s", $converter->GetHTTPErrorCode(), $converter->GetLog());
	}
	$doc->Close();

	//--------------------------------------------------------------------------------
	// Example 3) Convert multiple web pages, adding a table of contents, and setting
	// the first page as a cover page, not to be included with the table of contents outline. 

	$doc = new PDFDoc();

	$converter = new HTML2PDF();
	$header = "<div style='width:15%;margin-left:0.5cm;text-align:left;font-size:10px;color:#0000FF'><span class='date'></span></div><div style='width:70%;direction:rtl;white-space:nowrap;overflow:hidden;text-overflow:clip;text-align:center;font-size:10px;color:#0000FF'><span>PDFTRON HEADER EXAMPLE</span></div><div style='width:15%;margin-right:0.5cm;text-align:right;font-size:10px;color:#0000FF'><span class='pageNumber'></span> of <span class='totalPages'></span></div>";
	$footer = "<div style='width:15%;margin-left:0.5cm;text-align:left;font-size:7px;color:#FF00FF'><span class='date'></span></div><div style='width:70%;direction:rtl;white-space:nowrap;overflow:hidden;text-overflow:clip;text-align:center;font-size:7px;color:#FF00FF'><span>PDFTRON FOOTER EXAMPLE</span></div><div style='width:15%;margin-right:0.5cm;text-align:right;font-size:7px;color:#FF00FF'><span class='pageNumber'></span> of <span class='totalPages'></span></div>";
	$converter->SetHeader($header);
	$converter->SetFooter($footer);
	$converter->SetMargins("1cm", "2cm", ".5cm", "1.5cm");
    
	$settings = new WebPageSettings();
	$settings->SetZoom(0.5);
	$converter->InsertFromURL($host.$page0, $settings);
	$is_conversion_0_successful = $converter->Convert($doc);

	//convert page 1 with the same settings, appending generated PDF pages to doc
	$converter->InsertFromURL($host.$page1, $settings);
	$is_conversion_1_successful = $converter->Convert($doc);
	
	//convert page 2 with different settings, appending generated PDF pages to doc
	$another_converter = new HTML2PDF();
	$another_converter->SetLandscape(True);
	$another_settings = new WebPageSettings();
	$another_settings->SetPrintBackground(False);
	$another_converter->InsertFromURL($host.$page2, $another_settings);
	$is_conversion_2_successful = $another_converter->Convert($doc);
    
 	if ($is_conversion_0_successful && $is_conversion_1_successful && $is_conversion_2_successful)
 	{
		$doc->Save($output_path."_03.pdf", SDFDoc::e_linearized);
	}
	else {
		echo printf("Conversion failed. HTTP Code: %d\n%s", $converter->GetHTTPErrorCode(), $converter->GetLog());
	}
	$doc->Close();
	
	//--------------------------------------------------------------------------------
	// Example 4) Convert HTML string to PDF. 

	$doc = new PDFDoc();

	$converter = new HTML2PDF();
	
	// Our HTML data
	$html = "<html><body><h1>Heading</h1><p>Paragraph.</p></body></html>";
		
	// Add html data
	$converter->InsertFromHtmlString($html);
	// Note, InsertFromHtmlString can be mixed with the other Insert methods.
	
	if ( $converter->Convert($doc) ) {
		$doc->Save($output_path."_04.pdf", SDFDoc::e_linearized);
	}
	else {
		echo printf("Conversion failed. HTTP Code: %d\n%s", $converter->GetHTTPErrorCode(), $converter->GetLog());
	}
	$doc->Close();
	PDFNet::Terminate();
?>