display_header() │ WP 2.5.0

Display installation header.

No Hooks.

Return

null. Nothing (null).

Usage

display_header( $body_classes );
$body_classes(string)
-
Default: ''

Changelog

Since 2.5.0 Introduced.

display_header() code WP 6.6.2

wp-admin/install.php 
<?php
function display_header( $body_classes = '' ) {
	header( 'Content-Type: text/html; charset=utf-8' );
	if ( is_rtl() ) {
		$body_classes .= 'rtl';
	}
	if ( $body_classes ) {
		$body_classes = ' ' . $body_classes;
	}
	?>
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
	<meta name="viewport" content="width=device-width" />
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="robots" content="noindex,nofollow" />
	<title><?php _e( 'WordPress &rsaquo; Installation' ); ?></title>
	<?php wp_admin_css( 'install', true ); ?>
</head>
<body class="wp-core-ui<?php echo $body_classes; ?>">
<p id="logo"><?php _e( 'WordPress' ); ?></p>

	<?php
} // End display_header().