title: Is there a HTML variant of require_once?
body: <p>In HTML is there such a line of code that will do the same thing as PHP's require_once? I'm just curious because there are some lines of codes that I want to duplicate through multiples sheets without needing to require myself to type it each page. </p>
  
  <p>I know I can do it via PHP, but I am looking for an HTML variant? Is there such a beast or am I barking up the wrong tree? </p>