// og tags
function fb_opengraph() {
	global $post;


	if(is_single()) {
		if(has_post_thumbnail($post->ID)) {
			$img_src = wp_get_attachment_url(get_post_thumbnail_id($post->ID), 'medium');
		} else {
			$img_src = get_stylesheet_directory_uri() . '/img/opengraph_image.jpg';
		}
		if($excerpt = $post->post_excerpt) {
			$excerpt = strip_tags($post->post_excerpt);
			$excerpt = str_replace("", "'", $excerpt);
		} else {
			$excerpt = get_bloginfo('description');
		}
		?>
	<meta property="og:title" content="<?php echo the_title(); ?>"/>
	<meta property="og:description" content="<?php the_field('opis_produktu'); ?>"/>
	<meta property="og:type" content="article"/>
	<meta property="og:url" content="<?php echo the_permalink(); ?>"/>
	<meta property="og:site_name" content="<?php echo get_bloginfo(); ?>"/>
	<meta property="og:image" content="<?php echo $img_src; ?>"/>

  <?php
	} else {
		?>
		  <meta property="og:title" content="<?php echo get_bloginfo('title'); ?>"/>
		  <meta property="og:description" content="Opis w functions php"/>
		  <meta property="og:type" content="article"/>
		  <meta property="og:url" content="<?php echo get_home_url(); ?>"/>
		  <meta property="og:site_name" content="<?php echo get_bloginfo(); ?>"/>
		  <meta property="og:image" content="<?php echo get_template_directory_uri() ?>/img/site_image.jpg"/>

		<?php
	}
  }
  add_action('wp_head', 'fb_opengraph', 5);