Escaping/encoding single quotes in JSON encoded HTML5 data attributes

Question

In PHP, I use json_encode() to echo arrays in HTML5 data attributes. As JSON requires - and json_encode() generates - values encapsulated by double

Answer 1

You need to HTML escape data echoed into HTML:

printf('
',
    htmlspecialchars(json_encode(array('html5', ...)), ENT_QUOTES, 'UTF-8'));