SNSの流入を増やすOGP設定のスニペット3種

<meta property="og:title" content="タイトル">
<meta property="og:type" content="website か blog。もしくはarticle。">
<meta property="og:description" content="ページの簡単な説明">
<meta property="og:url" content="ページのURL">
<meta property="og:site_name" content="サイト名">
<meta property="og:image" content="サムネイル画像のURL>
<meta property="fb:app_id" content="XXXXXXXXX">

//OGP
add_action('wp_head','my_meta_ogp');

function my_meta_ogp() {
	if( is_front_page() || is_home() || is_singular() ){
		global $post;
		$ogp_title = '';
		$ogp_descr = '';
		$ogp_url = '';
		$ogp_img = '';
		$insert = '';

		if (is_front_page() || is_home()) { //トップページの場合
			$ogp_title = get_bloginfo('name');
			$ogp_descr = get_bloginfo('description');
			$ogp_url = home_url();
		} elseif(is_singular()) { //投稿か固定ページの場合
			setup_postdata($post);
			$ogp_title = $post->post_title;
			$ogp_descr = mb_substr(get_the_excerpt(), 0, 100);
			$ogp_url = get_permalink();
			wp_reset_postdata();
		}

		//og:type
		$ogp_type = (is_front_page() || is_home()) ? 'website' : 'article';

		//og:image
		if (is_singular() && has_post_thumbnail()) {
			$ps_thumb = wp_get_attachment_image_src(get_post_thumbnail_id(), 'full');
			$ogp_img = $ps_thumb[0];
		} else {
			$ogp_img = '【アイキャッチ画像が無い場合の画像のパス】';
		}

		//出力するOGPタグ
		$insert .= '<meta property="og:title" content="'.esc_attr($ogp_title).'">' . "\n";
		$insert .= '<meta property="og:description" content="'.esc_attr($ogp_descr).'">' . "\n";
		$insert .= '<meta property="og:type" content="'.$ogp_type.'">' . "\n";
		$insert .= '<meta property="og:url" content="'.esc_url($ogp_url).'">' . "\n";
		$insert .= '<meta property="og:image" content="'.esc_url($ogp_img).'">' . "\n";
		$insert .= '<meta property="og:site_name" content="'.esc_attr(get_bloginfo('name')).'">' . "\n";
		$insert .= '<meta name="twitter:card" content="summary_large_image">' . "\n";
		$insert .= '<meta name="twitter:site" content="【@XXXXXXX(Twitterのアカウント)】">' . "\n";
		$insert .= '<meta property="og:locale" content="ja_JP">' . "\n";

		echo $insert;
	}
}

<!-- BEGIN:OGP -->
<?php if (is_single() || is_page()) { ?>
<?php while (have_posts()) : the_post(); ?>
<meta property="og:title" content="<?php the_title(); ?>｜<?php bloginfo('name'); ?>" />
<meta property="og:type" content="article" />
<meta property="og:description" content="<?php $summary = strip_tags($post->post_content); $summary = preg_replace("/[[a-z,/]*]|n|r/", "", $summary); $summary = mb_substr($summary, 0, 80). "…"; echo $summary; ?>" />
<meta property="og:image" content="<?php if (has_post_thumbnail()) { $thumbnail = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID)); echo $thumbnail[0]; } else { echo 'ここにダミー用画像の場所を絶対パスで'; } ?>" />
<meta property="og:url" content="<?php the_permalink(); ?>" />
<?php endwhile; ?>
<?php } elseif (is_home()) { ?>
<meta property="og:title" content="<?php bloginfo('name'); ?>" />
<meta property="og:type" content="blog" />
<meta property="og:url" content="<?php bloginfo('url'); ?>" />
<meta property="og:description" content="<?php bloginfo('description'); ?>" />
<?php } else { ?>
<meta property="og:title" content="<?php wp_title('|', true, 'right'); ?><?php bloginfo('name'); ?>" />
<meta property="og:type" content="article" />
<meta property="og:image" content="<?php echo get_template_directory_uri(); ?>/ogp_default.jpg">" />
<meta property="og:url" content="<?php echo get_bloginfo('url').$_SERVER['REQUEST_URI']; ?>" />
<meta property="og:description" content="<?php bloginfo('description'); ?>" />
<?php } ?>
<meta property="og:site_name" content="<?php bloginfo('name'); ?>" />
<meta property="fb:app_id" content="XXXXXXXXX">
<!-- END:OGP -->