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<?php
/**
** Generic Widget
** Version 1.0.0
**/
define( 'GENERIC_WIDGET_VERSION', 1 );
class Generic_Widget extends WP_Widget {
const OPTION_VERSION = 'generic_widget_version';
const SCRIPTS_VERSION = 1;
private $version = false;
/* Define and register singleton */
private static $instance = false;
public static function instance() {
if( ! self::$instance ) {
self::$instance = new Generic_Widget;
}
return self::$instance;
}
/**
* Clone
*
* @since 1.0.0
*/
private function __clone() { }
/**
* Add actions and filters
*
* @uses add_action, add_filter
* @since 1.0.0
*/
function __construct() {
global $wp_version;
// Version Checking
if( $version = get_option( self::OPTION_VERSION, false ) ) {
$this->version = $version;
} else {
$this->version = GENERIC_WIDGET_VERSION;
add_option( self::OPTION_VERSION, $this->version );
}
}
/**
* Version Checking
*
* @since 1.0.0
*/
function action_init_check_version() {
// Check if the version has changed and if so perform the necessary actions
if ( ! isset( $this->version ) || $this->version < GENERIC_WIDGET_VERSION ) {
// Do version upgrade tasks here
update_option( self::OPTION_VERSION, GENERIC_WIDGET_VERSION );
}
}
/**
* Outputs the content of the widget
*
* @since 1.0.0
*/
public function widget( $args, $instance ) {
// outputs the content of the widget
}
/**
* Outputs the options form on admin
*
* @since 1.0.0
*/
public function form( $instance ) {
// outputs the options form on admin
}
/**
* Processes widget options to be saved
*
* @since 1.0.0
*/
public function update( $new_instance, $old_instance ) {
// processes widget options to be saved
}
} // Class
Generic_Widget::instance();
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