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How add options to your WordPress 2.7 dashboard widgets

Well, in this article, I assume you have read the WP Engineer’s excellent post Add WordPress Dashboard Widgets, because his code will be our start point.

So, we have this code:


// Load up the localization file if we're using WordPress in a different language
// Place it in this plugin's folder and name it "MainFunction-[value in wp-config].mo"
load_plugin_textdomain( 'MainFunction', '/wp-content/plugins/MainFunction' );

/**
 * Content of Dashboard-Widget
 */
function MainFunction() {
	echo 'Test Add Dashboard-Widget';
}
 
/**
 * add Dashboard Widget via function wp_add_dashboard_widget()
 */
function MainFunction_Init() {
	wp_add_dashboard_widget( 'MainFunction', __( 'MainFunction Widget Title' ), 'MainFunction' );
}
 
/**
 * use hook, to integrate new widget
 */
add_action('wp_dashboard_setup', 'MainFunction_Init');

OK, now, remenber the wp_add_dashboard_widget function?

function wp_add_dashboard_widget( $widget_id, $widget_name, $callback, $control_callback = null )

The $control_callback parameter (obviously optional) is our main target. It gives the ‘Configure’ option to our spiffy widget.
So, we need to add a 4th parameter to wp_add_dashboard_widget:

wp_add_dashboard_widget( 'MainFunction', __( 'MainFunction Widget Title' ), 'MainFunction', 'MainFunction_Setup');

The MainFunction_Setup function handles two things: the options (set the default options, recolect new values, etc) and the option’s presentation (i.e. the HTML part)

So, here goes the code:


function MainFunction_Options() {
	$defaults = array( 'items' => 5, 'boolean' => 1);
	if ( ( !$options = get_option( 'MainFunction' ) ) || !is_array($options) )
		$options = array();
	return array_merge( $defaults, $options );
}

function MainFunction_Setup() {

	$options = MainFunction_Options();


	if ( 'post' == strtolower($_SERVER['REQUEST_METHOD']) && isset( $_POST['widget_id'] ) && 'MainFunction' == $_POST['widget_id'] ) {
		foreach ( array( 'items', 'boolean' ) as $key )
				$options[$key] = $_POST[$key];
		update_option( 'MainFunction', $options );
	}
		
?>
	

		
	


   

		
	



As you can see, MainFunction_Options puts the default values (if necessary, of course) and MainFunction_Setup show the current values and let change them. You can merge this two, of course...


Now, we have to get the options and use them in our MainFunction function. Change MainFunction like that:


/**
 * Content of Dashboard-Widget
 */
function MainFunction() {

        $widget_options = MainFunction_Options();

	echo 'Test Add Dashboard-Widget
';
	echo "You have selected $widget_options['items'] items
";
	echo "boolean is $widget_options['boolean']
";

}



The complete code here: 


';
	echo "You have selected $widget_options['items'] items
";
	echo "boolean is $widget_options['boolean']
";
}
 
/**
 * add Dashboard Widget via function wp_add_dashboard_widget()
 */
function MainFunction_Init() {
	wp_add_dashboard_widget( 'MainFunction', __( 'MainFunction Widget Title' ), 'MainFunction' , 'MainFunction_Setup' );
}

function MainFunction_Options() {
	$defaults = array( 'items' => 5, 'boolean' => 1);
	if ( ( !$options = get_option( 'MainFunction' ) ) || !is_array($options) )
		$options = array();
	return array_merge( $defaults, $options );
}

function MainFunction_Setup() {


	$options = MainFunction_Options();


	if ( 'post' == strtolower($_SERVER['REQUEST_METHOD']) && isset( $_POST['widget_id'] ) && 'MainFunction' == $_POST['widget_id'] ) {
		foreach ( array( 'items', 'boolean' ) as $key )
				$options[$key] = $_POST[$key];
		update_option( 'MainFunction', $options );
	}
		
?>
	

		
	


   

		
	





You can view a PHPS version (without PHP crippled tags) here.

536 replies on “How add options to your WordPress 2.7 dashboard widgets”

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