Custom Post Type Archive Description Field

custom-post-type-description

//http://wpsettingsapi.jeroensormani.com/
add_action( 'admin_menu', 'tsumtour_add_admin_menu' );
add_action( 'admin_init', 'tsumtour_settings_init' );
function tsumtour_add_admin_menu(  ) { 
	add_submenu_page( 'edit.php?post_type=tour', 'Tour', 'Intro', 'manage_options', 'tour', 'tsumtour_options_page' );
}
function tsumtour_settings_init(  ) { 
	register_setting( 'pluginPage', 'tsumtour_settings' );
	add_settings_section(
		'tsumtour_pluginPage_section', 
		__( 'Introduction', 'tsum_tour' ), 
		'tsumtour_settings_section_callback', 
		'pluginPage'
	);
	add_settings_field( 
		'tsumtour_textarea_field_0', 
		__( '', 'tsum_tour' ), 
		'tsumtour_textarea_field_0_render', 
		'pluginPage', 
		'tsumtour_pluginPage_section' 
	);
}
function tsumtour_textarea_field_0_render(  ) { 
	$options = get_option( 'tsumtour_settings' );
	?>
	<textarea cols='80' rows='15' name='tsumtour_settings[tsumtour_textarea_field_0]'> 
		<?php echo $options['tsumtour_textarea_field_0']; ?>
 	</textarea>
	<?php
}