OLAS/public/PHPWord-0.12.1/samples/Sample_35_InternalLink.php

<?php
include_once 'Sample_Header.php';

// New Word document
echo date('H:i:s'), ' Create new PhpWord object', EOL;
$phpWord = new \PhpOffice\PhpWord\PhpWord();

$section = $phpWord->addSection();
$section->addTitle(htmlspecialchars('This is page 1'), 1);
$linkIsInternal = true;
$section->addLink('MyBookmark', htmlspecialchars('Take me to page 3'), null, null, $linkIsInternal);
$section->addPageBreak();
$section->addTitle(htmlspecialchars('This is page 2'), 1);
$section->addPageBreak();
$section->addTitle(htmlspecialchars('This is page 3'), 1);
$section->addBookmark('MyBookmark');

// Save file
echo write($phpWord, basename(__FILE__, '.php'), $writers);
if (!CLI) {
    include_once 'Sample_Footer.php';
}