Widget Starter Code

widget-starter.php

<?php
/******************************************************************************************
* Class sensl_whistles_widget
* Builds the widget for adding post content to widgetized area extending WP_Widget
******************************************************************************************/
class MDW_Widget extends WP_Widget {
    
    function mdw_widget() {
        
        $widget_ops = array(
        	'classname' => 'mdw_widget',
        	'description' => __( "Description of widget apearing on widgets page in admin.")
        );
        
        $this->WP_Widget(
        	'mdw_widget',
        	__( 'Widget Display Title in Admin', 'mdw_widget' ),
        	$widget_ops
        );
        
    }
    
    /*************************************************************
    * build the widget output to the widget area
    *************************************************************/
    function widget( $args, $instance ) {
    	
    	extract( $args );
		
		/* output the before widget content declared when sidebar is registered */
		echo $before_widget;
				
		// widget front end output here
		
		/* output the after widget content declared when sidebar is registered */
		echo $after_widget; 
		        
    } // end widget output
    
    /*************************************************************
    * widget update function
    *************************************************************/
    function update( $new_instance, $old_instance ) {
        
        $instance = $old_instance;
        $instance[ 'title' ] = strip_tags( $new_instance[ 'title' ] );
		
		/*************************************************************
		* repeat the above for any other form fields you have used
		*************************************************************/
		
        return $instance;
        
    }
    
    /*************************************************************
    * widget dashboard output
    *************************************************************/
    function form( $instance ) {
    
    	if( isset( $instance[ 'title' ] ) ) {
	    	$title = esc_attr( $instance[ 'title' ] );
    	} else {
	    	$title = '';
    	}
		
		/*************************************************************
		* repeat the above for any other form fields you have used
		*************************************************************/
		
		/*************************************************************
	    * html markup to output widget form in admin
	    *************************************************************/
       	?>
       	
        <p><label for="<?php echo $this->get_field_id( 'title' ); ?>">
        <?php _e( 'Title for whistle:' ); ?>
        <input class="widefat" id="<?php echo $this->get_field_id( 'title'); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo $title; ?>" /></label></p>
 		        		
    <?php
    }

} // ends class
?>