PHP Domdocument line break not working using create element

Question

I am trying to create a div element using a PHP dom document and it's working as expected. but when I try to insert a line break it's not working. I have imported the dom document to mpdf for generating PDF. I have tried the following code

$document = new DomDocument();
$value = 'First line<br>Second line';
$all_inputs = $xpath->query( '//input | //textarea | //img | //script' );
$len        = $all_inputs->length;
for ( $i = 0; $i < $len; $i++ ) {
    $input = $all_inputs->item( $i );
     $div   = $document->createElement( 'div' );
$div->textContent = $value;
$input->parentNode->replaceChild( $div, $input );
}

$document->saveHTML();