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Search & replace PDF text or images in PHP

Sample PHP code to use PDFTron SDK for searching and replacing text strings and images inside existing PDF files (e.g. business cards and other PDF templates). Unlike PDF forms, the ContentReplacer works on actual PDF content and is not limited to static rectangular annotation regions. Learn more about our PDF Editing & Manipulation Library.

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

include("../../../PDFNetC/Lib/PDFNetPHP.php");

//-----------------------------------------------------------------------------------------
// The sample code illustrates how to use the ContentReplacer class to make using 
// 'template' pdf documents easier.
//-----------------------------------------------------------------------------------------
	PDFNet::Initialize();
	
	// Relative path to the folder containing the test files.
	$input_path = getcwd()."/../../TestFiles/";
	$output_path = $input_path."Output/";

	//--------------------------------------------------------------------------------
	// Example 1) Update a business card template with personalized info
	$doc = new PDFDoc($input_path."BusinessCardTemplate.pdf");
	$doc->InitSecurityHandler();

	// first, replace the image on the first page
	$replacer = new ContentReplacer();
	$page = $doc->GetPage(1);
	$img = Image::Create($doc->GetSDFDoc(), $input_path."peppers.jpg");
	$replacer->AddImage($page->GetMediaBox(), $img->GetSDFObj());
	// next, replace the text place holders on the second page
	$replacer->AddString("NAME", "John Smith");
	$replacer->AddString("QUALIFICATIONS", "Philosophy Doctor"); 
	$replacer->AddString("JOB_TITLE", "Software Developer"); 
	$replacer->AddString("ADDRESS_LINE1", "#100 123 Software Rd"); 
	$replacer->AddString("ADDRESS_LINE2", "Vancouver, BC"); 
	$replacer->AddString("PHONE_OFFICE", "604-730-8989"); 
	$replacer->AddString("PHONE_MOBILE", "604-765-4321"); 
	$replacer->AddString("EMAIL", "info@pdftron.com"); 
	$replacer->AddString("WEBSITE_URL", "http://www.pdftron.com"); 
	// finally, apply
	$replacer->Process($page);
	
	$doc->Save($output_path."BusinessCard.pdf", 0);
	echo nl2br("Done. Result saved in BusinessCard.pdf\n");

	//--------------------------------------------------------------------------------
	// Example 2) Replace text in a region with new text
	$doc = new PDFDoc($input_path."newsletter.pdf");
	$doc->InitSecurityHandler();

	$replacer = new ContentReplacer();
	$page = $doc->GetPage(1);
	$target_region = $page->GetMediaBox();
	$replacer->AddText($target_region, "hello hello hello hello hello hello hello hello hello hello");
	$replacer->Process($page);

	$doc->Save($output_path."ContentReplaced.pdf", 0);
	echo nl2br("Done. Result saved in ContentReplaced.pdf\n");

	echo nl2br("Done.\n");
?>
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