Add open graph (og:) tags to wordpress for facebook sharing of posts

Add open graph (og:) tags to wordpress for facebook sharing of posts

<?php if( is_single() ) { ?>
	<?php 
		function ogtrimtext($data, $limit) {
		  $arr = explode(" ", $data);
		  $new_arr = array_slice($arr, 0, $limit);
		  return implode(" ", $new_arr);
		}

		global $post;
		$og_post_object = get_post( $post_id ); 
		$og_title = get_the_title($post->ID); 
		$og_content = $post->post_content;
		$og_desc = preg_replace("/<img[^>]+\>/i", "", $og_content);
		$og_excerpt = trim(ogtrimtext($og_desc, 15)); 
		$og_thumburl = wp_get_attachment_url( get_post_thumbnail_id( $post->ID ), 'full' );
		$og_filetype = wp_check_filetype($og_thumburl);

	if(has_post_thumbnail( $post->ID, 'full' )) { ?>
		<meta property="og:image" content="<?php echo $og_thumburl; ?>">
		<meta property="og:image:type" content="<?php echo $og_filetype['type']; ?>">
		<meta property="og:image:width" content="100%">
		<meta property="og:image:height" content="100%">
		<meta property="og:type" content="article">
		<meta property="og:title" content="<?php echo $og_title; ?>">
		<meta property="og:description" content="<?php echo $og_excerpt; ?>">
	<?php } ?>
<?php } ?>