如何将类应用于PHP行？

I have <?php get_header(); ?> for the header and want to add in class="sticky" so that when it's parsed to HTML it will read <header class=sticky">

Where/how would I do this? Various places I've tried within the PHP line gives me an error message **Parse error: syntax error, unexpected '?' in /home2//public_html/wp-content/themes/conf-theme/page.php on line 1**

Open the header.php file and add the sticky class to

<header id="masthead" class="site-header" role="banner">

The get_header function

Includes the header.php template file from your current theme's directory.

EDIT jQuery

<script type="text/javascript">
$(document).ready(function()
{
    $("header").addClass("sticky");
});
</script>