WP: Customize the Dashboard

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add_action('wp_dashboard_setup', 'my_custom_dashboard_widgets');

function my_custom_dashboard_widgets() {
	global $wp_meta_boxes;

	// Remove these dashboard widgets...

	unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
	
	// Add a custom widget called 'Help and Support'
	wp_add_dashboard_widget('custom_help_widget', 'Help and Support', 'custom_dashboard_help');

}

// This is the content for your custom widget

function custom_dashboard_help() {
	echo '<p>Lorum ipsum delor sit amet et nunc</p>';
}