Widget register

/*This code for sidebar widget register*/
	
	function widget_areas() {
		register_sidebar( array(
			'name' => 'Left Menu',
			'id' => 'left_sidebar',
			'before_widget' => '<div class="single_sidebar">',
			'after_widget' => '</div>',
			'before_title' => '<h2>',
			'after_title' => '</h2>',
		) );
	}
	add_action('widgets_init', 'widget_areas');
	
	
/*codndition code for widget */	

	<?php if ( ! dynamic_sidebar( 'sidebar_left' ) ) : ?>
	
		<?php endif; ?>