const SOME_HTML = `<div class="${object.class}"></div>`;const SOME_HTML = '<div class="' . $object['class'] . '"></div>';"<div class=\"$array[key]\"> </div>";
"<div class=\"{$array['key']}\"> </div>";
"<div class=\"$object->property\"> </div>";См. Variable parsing
$html = <<< HTML
<div class="{$object["class"]}"></div>
HTML;$class = $object['class'];
$string = "<div class='{$class}'></div>";