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Read, add, edit PDF outlines and bookmarks in PHP

Sample PHP code to use PDFTron SDK for programmatically reading and editing existing outline items, and for creating new PDF bookmarks using the high-level API. 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 read and edit existing outline items and create 
// new bookmarks using the high-level API.
//---------------------------------------------------------------------------------------	

function PrintIndent ($item) {
	$ident = $item->GetIndent() - 1;
	for ($i=0; $i<$ident; ++$i) {
		echo "     ";
	}
}

// Prints out the outline tree to the standard output
function PrintOutlineTree($item) {
	for (; $item->IsValid(); $item=$item->GetNext())
	{
		PrintIndent($item);
		echo ($item->IsOpen() ? "- " : "+ ").$item->GetTitle()." ACTION -> ";

		// Print Action
		$action = $item->GetAction();
		if ($action->IsValid()) {
			if ($action->GetType() == Action::e_GoTo) {
				$dest = $action->GetDest();
				if ($dest->IsValid()) {
					$page = $dest->GetPage();
					echo nl2br("GoTo Page #".$page->GetIndex()."\n");
				}
			}
			else {
				echo nl2br("Not a 'GoTo' action\n");
			}
		} else {
			echo nl2br("NULL\n");
		}

		if ($item->HasChildren())	 // Recursively print children sub-trees
		{
			PrintOutlineTree($item->GetFirstChild());
		}
	}
}
	PDFNet::Initialize();

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

	$doc = new PDFDoc($input_path."numbered.pdf");
	$doc->InitSecurityHandler();

	// The following example illustrates how to create and edit the outline tree 
	// using high-level Bookmark methods.
	$doc = new PDFDoc($input_path."numbered.pdf");
	$doc->InitSecurityHandler();

	// Lets first create the root bookmark items. 
	$red = Bookmark::Create($doc, "Red");
	$green = Bookmark::Create($doc, "Green");
	$blue = Bookmark::Create($doc, "Blue");

	$doc->AddRootBookmark($red);
	$doc->AddRootBookmark($green);
	$doc->AddRootBookmark($blue);

	// You can also add new root bookmarks using $bookmark->AddNext("...")
	$blue->AddNext("foo");
	$blue->AddNext("bar");

	// We can now associate new bookmarks with page destinations:

	// The following example creates an 'explicit' destination (see 
	// section '8.2.1 Destinations' in PDF Reference for more details)
	$red_dest = Destination::CreateFit($doc->GetPageIterator()->Current());
	$red->SetAction(Action::CreateGoto($red_dest));

	// Create an explicit destination to the first green page in the document
	$green->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(10)) ));

	// The following example creates a 'named' destination (see 
	// section '8.2.1 Destinations' in PDF Reference for more details)
	// Named destinations have certain advantages over explicit destinations.
	$key = "blue1";
	$blue_action = Action::CreateGoto($key, strlen($key), Destination::CreateFit($doc->GetPage(19)));

	$blue->SetAction($blue_action);

	// We can now add children Bookmarks
	$sub_red1 = $red->AddChild("Red - Page 1");
	$sub_red1->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(1))));
	$sub_red2 = $red->AddChild("Red - Page 2");
	$sub_red2->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(2))));
	$sub_red3 = $red->AddChild("Red - Page 3");
	$sub_red3->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(3))));
	$sub_red4 = $sub_red3->AddChild("Red - Page 4");
	$sub_red4->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(4))));
	$sub_red5 = $sub_red3->AddChild("Red - Page 5");
	$sub_red5->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(5))));
	$sub_red6 = $sub_red3->AddChild("Red - Page 6");
	$sub_red6->SetAction(Action::CreateGoto(Destination::CreateFit($doc->GetPage(6))));
	
	// Example of how to find and delete a bookmark by title text.
	$foo = $doc->GetFirstBookmark()->Find("foo");
	if ($foo->IsValid()) 
	{
		$foo->Delete();
	}
	else 
	{
		assert(false);
	}

	$bar = $doc->GetFirstBookmark()->Find("bar");
	if ($bar->IsValid()) 
	{
		$bar->Delete();
	}
	else 
	{
		assert(false);
	}

	// Adding color to Bookmarks. Color and other formatting can help readers 
	// get around more easily in large PDF documents.
	$red->SetColor(1.0, 0.0, 0.0);
	$green->SetColor(0.0, 1.0, 0.0);
	$green->SetFlags(2);			// set bold font
	$blue->SetColor(0.0, 0.0, 1.0);
	$blue->SetFlags(3);			// set bold and italic

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

	// The following example illustrates how to traverse the outline tree using 
	// Bookmark navigation methods: Bookmark.GetNext(), Bookmark.GetPrev(), 
	// Bookmark.GetFirstChild () and Bookmark.GetLastChild ().

	// Open the document that was saved in the previous code sample
	$doc = new PDFDoc($output_path."bookmark.pdf");
	$doc->InitSecurityHandler();

	$root = $doc->GetFirstBookmark();
	PrintOutlineTree($root);
	echo nl2br("Done.\n");

	// The following example illustrates how to create a Bookmark to a page 
	// in a remote document. A remote go-to action is similar to an ordinary 
	// go-to action, but jumps to a destination in another PDF file instead 
	// of the current file. See Section 8.5.3 'Remote Go-To Actions' in PDF 
	// Reference Manual for details.

	// Open the document that was saved in the previous code sample
	$doc = new PDFDoc($output_path."bookmark.pdf");
	$doc->InitSecurityHandler();

	// Create file specification (the file referred to by the remote bookmark)
	$file_spec = $doc->CreateIndirectDict(); 
	$file_spec->PutName("Type", "Filespec");
	$file_spec->PutString("F", "bookmark.pdf");
	$spec = new FileSpec($file_spec);
	$goto_remote = Action::CreateGotoRemote($spec, 5, true);

	$remoteBookmark1 = Bookmark::Create($doc, "REMOTE BOOKMARK 1");
	$remoteBookmark1->SetAction($goto_remote);
	$doc->AddRootBookmark($remoteBookmark1);

	// Create another remote bookmark, but this time using the low-level SDF/Cos API.
	// Create a remote action
	$remoteBookmark2 = Bookmark::Create($doc, "REMOTE BOOKMARK 2");
	$doc->AddRootBookmark($remoteBookmark2);

	$gotoR = $remoteBookmark2->GetSDFObj()->PutDict("A");
	
	$gotoR->PutName("S","GoToR"); // Set action type
	$gotoR->PutBool("NewWindow", true);

	// Set the file specification
	$gotoR->Put("F", $file_spec);

	// jump to the first page. Note that pages are indexed from 0.
	$dest = $gotoR->PutArray("D");  // Set the destination
	$dest->PushBackNumber(9); 
	$dest->PushBackName("Fit");

	$doc->Save($output_path."bookmark_remote.pdf", SDFDoc::e_linearized);

	echo nl2br("Done. Result saved in bookmark_remote.pdf\n");
?>
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