wp-admin/includes/template.php:2658Prints out the beginning of the admin HTML header.
One hook fires while _wp_admin_html_begin() runs, in this order:
Fires inside the HTML tag in the admin header.
function _wp_admin_html_begin() { global $is_IE; $admin_html_class = ( is_admin_bar_showing() ) ? 'wp-toolbar' : ''; if ( $is_IE ) { header( 'X-UA-Compatible: IE=edge' ); } ?><!DOCTYPE html><html class="<?php echo $admin_html_class; ?>" <?php /** * Fires inside the HTML tag in the admin header. * * @since 2.2.0 */ do_action( 'admin_xml_ns' ); language_attributes(); ?>><head><meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php echo get_option( 'blog_charset' ); ?>" /> <?php}Introduced in 3.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.