Widgets Generator

                    class wpturbo_My_Custom_Widget extends WP_Widget {

	// Initialize The Widget.
	function __construct() {
		parent::__construct(
			'wpturbo_My_Custom_Widget',
			esc_html__('My Custom Widget', 'wpturbo')
			array( 'description' => esc_html__('My Awesome Custom Widget', 'wpturbo'), )
		);
	}

	// Widget Fields
	private $widget_fields = array(
		array(
			'label' => 'My Text Field',
			'id' => 'wpturbo-my-text-field',
			'default' => 'My Default Value',
			'type' => 'text',
		),
	);

	// This function generates the front-end content that will be displayed.
	public function widget( $args, $instance ) {
		// Before and after widget  is set by the theme.
		echo $args['before_widget'];

		// Check if user has set a title for this widget
		if ( !empty($instance['title']) ) {
			// Before and after widget title is set by the theme.
			echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'] ) . $args['after_title'];
		}

		// Now, output the generated fields
		echo '<p>' . $instance['wpturbo-my-text-field'] . '</p>';

		echo $args['after_widget'];
	}

	public function field_generator( $instance ) {
		$output = '';
		foreach ( $this->widget_fields as $widget_field ) {
			$default = '';
			if ( isset($widget_field['default']) ) {
				$default = $widget_field['default'];
			}

			$widget_value = ! empty( $instance[$widget_field['id']] ) ? $instance[$widget_field['id']] : esc_html__( $default, 'textdomain' );
			switch ( $widget_field['type'] ) {

				default:
					$output .= '<p>';
					$output .= '<label for="'.esc_attr( $this->get_field_id( $widget_field['id'] ) ).'">'.esc_attr( $widget_field['label'], 'textdomain' ).':</label> ';
					$output .= '<input class="widefat" id="'.esc_attr( $this->get_field_id( $widget_field['id'] ) ).'" name="'.esc_attr( $this->get_field_name( $widget_field['id'] ) ).'" type="'.$widget_field['type'].'" value="'.esc_attr( $widget_value ).'">';
					$output .= '</p>';
			}
		}
	}

	public function form( $instance ) {
		$title = ! empty( $instance['title'] ) ? $instance['title'] : esc_html__( '', 'textdomain' );
		?>
		<p>
			<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php esc_attr_e( 'Title:', 'textdomain' ); ?></label>
			<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>">
		</p>
		<?php
		$this->field_generator( $instance );
	}

	// Sanitize widget form values as they are saved
	public function update( $new_instance, $old_instance ) {
		$instance = array();
		$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
		foreach ( $this->widget_fields as $widget_field ) {
			switch ( $widget_field['type'] ) {
				default:
					$instance[$widget_field['id']] = ( ! empty( $new_instance[$widget_field['id']] ) ) ? strip_tags( $new_instance[$widget_field['id']] ) : '';
			}
		}
		return $instance;
	}
}

function register_wpturbo_My_Custom_Widget_widget() {
	register_widget( 'wpturbo_My_Custom_Widget' );
}
add_action( 'widgets_init', 'register_wpturbo_My_Custom_Widget_widget' );