site_admin_notice()

Displays an admin notice to upgrade all sites after a core upgrade.

Return

(false) False if the current user is not a super admin.

Source

File: wp-admin/includes/ms.php 

function site_admin_notice() {
	global $wp_db_version, $pagenow;

	if ( ! current_user_can( 'upgrade_network' ) ) {
		return false;
	}

	if ( 'upgrade.php' == $pagenow ) {
		return;
	}

	if ( get_site_option( 'wpmu_upgrade_site' ) != $wp_db_version ) {
		echo "<div class='update-nag'>" . sprintf( __( 'Thank you for Updating! Please visit the <a href="%s">Upgrade Network</a> page to update all your sites.' ), esc_url( network_admin_url( 'upgrade.php' ) ) ) . "</div>";
	}
}

Expand Source Code View on GitHub

Related

Uses

Uses
Uses Description
wp-includes/l10n.php: __()

Retrieve the translation of $text.
wp-includes/link-template.php: network_admin_url()

Retrieves the URL to the admin area for the network.
wp-includes/capabilities.php: current_user_can()

Whether the current user has a specific capability.
wp-includes/option.php: get_site_option()

Retrieve an option value for the current network based on name of option.
wp-includes/formatting.php: esc_url()

Checks and cleans a URL.

Changelog

Changelog
Version Description
WP-3.0.0 Introduced.