function nskw_ogp_output()
{
$installed = get_option('nskw_ogp_id_select');
if (!$installed) {
return;
}
// remove ogp tags by jetpack plugin
add_filter('jetpack_enable_opengraph', '__return_false', 11);
$og_title = $og_type = $og_url = $og_img = $og_sitename = $og_locale = $og_description = '';
// og:site_name
$sitename = get_bloginfo('name');
$og_sitename = $sitename;
// og:title
if (is_front_page() || is_home()) {
$og_title = $sitename;
} elseif (is_singular()) {
$og_title = get_the_title() . ' - ' . $sitename;
} elseif (is_search()) {
$og_title = wp_title('-', false, 'right');
} else {
$og_title = __('Archive of: ', 'nskw-ogp-generator') . wp_title('-', false, 'right');
}
// og:type
if (is_home()) {
$og_type = 'blog';
} elseif (is_front_page()) {
$og_type = 'website';
} else {
$og_type = 'article';
}
// og:url
if (is_single()) {
$og_url = get_permalink();
} elseif (is_front_page()) {
$og_url = home_url();
} elseif (is_home()) {
if ($blog_page = get_option('page_for_posts')) {
$og_url = get_permalink($blog_page);
} else {
$og_url = home_url();
}
}
// og:img
$user_set_image = get_option('nskw_ogp_img');
$user_set_image = apply_filters('nskw_ogp_user_set_image', $user_set_image);
if (is_singular() && !is_front_page() && !is_home()) {
if (has_post_thumbnail()) {
$ogimage_id = get_post_thumbnail_id();
$ogimage_url = wp_get_attachment_image_src($ogimage_id, 'full', true);
$og_img = $ogimage_url[0];
} else {
$id = get_the_ID();
$attachments = get_children(array('post_parent' => $id, 'post_type' => 'attachment', 'post_mime_type' => 'image', 'orderby' => 'menu_order'));
foreach ($attachments as $attachment) {
$image_src = wp_get_attachment_image_src($attachment->ID, 'full', true);
$og_img = isset($image_src[0]) ? $image_src[0] : '';
break;
}
if ('' == $og_img) {
global $post;
if (preg_match_all('/<img .*src=[\'"]([^\'"]+)[\'"]/', $post->post_content, $matches, PREG_SET_ORDER)) {
$og_img = $matches[0][1];
}
}
}
}
if ('' == $og_img) {
$og_img = $user_set_image;
}
// og:locale
$og_locale = get_locale();
if ('ja' == $og_locale) {
$og_locale = 'ja_JP';
} elseif ('th' == $og_locale) {
$og_locale = 'th_TH';
}
// og:description
if (is_singular() && !is_front_page() && !is_home()) {
global $post;
if ($post->post_excerpt) {
$description = $post->post_excerpt;
} else {
$description = $post->post_content;
}
$description = wp_strip_all_tags($description);
$description = strip_shortcodes($description);
$og_description = wp_trim_words($description, 100, '');
} else {
$og_description = get_bloginfo('description');
}
$og_description = apply_filters('nskw_og_description', $og_description);
// about ids
$property = get_option('nskw_ogp_id_select');
$content = esc_attr(get_option('nskw_ogp_app_id'));
if ('' != $content && in_array($property, get_nskw_white_list())) {
?>
<meta property="<?php
echo esc_attr($property);
?>
" content="<?php
echo $content;
?>
" /><?php
echo "\n";
}
// let's out put the meta tags.
$ogp_tags = array('og:title' => $og_title, 'og:type' => $og_type, 'og:url' => $og_url, 'og:image' => $og_img, 'og:site_name' => $og_sitename, 'og:locale' => $og_locale, 'og:description' => $og_description);
foreach ($ogp_tags as $property => $content) {
if ('' != $content) {
?>
<meta property="<?php
echo $property;
?>
" content="<?php
echo esc_attr($content);
?>
" />
<?php
}
}
}
function nskw_white_list($text)
{
$fff = get_nskw_white_list();
return in_array($text, $fff) ? $text : false;
}
