הוספת באנר מתחת לCONTENT

add_filter('the_content', 'gs_extra_content') ; 
function gs_extra_content ($content) {
	if(is_singular('post')): 
		$extra_stuff = "<!-- banner code in functions by Global Solution-->";
		$extra_stuff .= "<div style='text-align: center;'><img style='width: 70%;' src='http://www.ligga.co.il/wp-content/uploads/2018/04/111.jpg'/></div>";
	endif;
	return $content.$extra_stuff;
}