395 lines
14 KiB
PHP
395 lines
14 KiB
PHP
<?php
|
|
/**
|
|
* Open Graph Tags
|
|
*
|
|
* Add Open Graph tags so that Facebook (and any other service that supports them)
|
|
* can crawl the site better and we provide a better sharing experience.
|
|
*
|
|
* @link http://ogp.me/
|
|
* @link http://developers.facebook.com/docs/opengraph/
|
|
*/
|
|
add_action( 'wp_head', 'jetpack_og_tags' );
|
|
|
|
function jetpack_og_tags() {
|
|
/**
|
|
* Allow Jetpack to output Open Graph Meta Tags.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 2.0.0
|
|
* @deprecated 2.0.3 Duplicative filter. Use `jetpack_enable_open_graph`.
|
|
*
|
|
* @param bool true Should Jetpack's Open Graph Meta Tags be enabled. Default to true.
|
|
*/
|
|
if ( false === apply_filters( 'jetpack_enable_opengraph', true ) ) {
|
|
_deprecated_function( 'jetpack_enable_opengraph', '2.0.3', 'jetpack_enable_open_graph' );
|
|
return;
|
|
}
|
|
|
|
// Disable the widont filter on WP.com to avoid stray  s
|
|
$disable_widont = remove_filter( 'the_title', 'widont' );
|
|
|
|
$og_output = "\n<!-- Jetpack Open Graph Tags -->\n";
|
|
$tags = array();
|
|
|
|
/**
|
|
* Filter the minimum width of the images used in Jetpack Open Graph Meta Tags.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param int 200 Minimum image width used in Jetpack Open Graph Meta Tags.
|
|
*/
|
|
$image_width = absint( apply_filters( 'jetpack_open_graph_image_width', 200 ) );
|
|
/**
|
|
* Filter the minimum height of the images used in Jetpack Open Graph Meta Tags.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param int 200 Minimum image height used in Jetpack Open Graph Meta Tags.
|
|
*/
|
|
$image_height = absint( apply_filters( 'jetpack_open_graph_image_height', 200 ) );
|
|
$description_length = 197;
|
|
|
|
if ( is_home() || is_front_page() ) {
|
|
$site_type = get_option( 'open_graph_protocol_site_type' );
|
|
$tags['og:type'] = ! empty( $site_type ) ? $site_type : 'website';
|
|
$tags['og:title'] = get_bloginfo( 'name' );
|
|
$tags['og:description'] = get_bloginfo( 'description' );
|
|
|
|
$front_page_id = get_option( 'page_for_posts' );
|
|
if ( 'page' == get_option( 'show_on_front' ) && $front_page_id && is_home() )
|
|
$tags['og:url'] = get_permalink( $front_page_id );
|
|
else
|
|
$tags['og:url'] = home_url( '/' );
|
|
|
|
// Associate a blog's root path with one or more Facebook accounts
|
|
$facebook_admins = get_option( 'facebook_admins' );
|
|
if ( ! empty( $facebook_admins ) )
|
|
$tags['fb:admins'] = $facebook_admins;
|
|
|
|
} else if ( is_author() ) {
|
|
$tags['og:type'] = 'profile';
|
|
|
|
$author = get_queried_object();
|
|
|
|
$tags['og:title'] = $author->display_name;
|
|
if ( ! empty( $author->user_url ) ) {
|
|
$tags['og:url'] = $author->user_url;
|
|
} else {
|
|
$tags['og:url'] = get_author_posts_url( $author->ID );
|
|
}
|
|
$tags['og:description'] = $author->description;
|
|
$tags['profile:first_name'] = get_the_author_meta( 'first_name', $author->ID );
|
|
$tags['profile:last_name'] = get_the_author_meta( 'last_name', $author->ID );
|
|
|
|
} else if ( is_singular() ) {
|
|
global $post;
|
|
$data = $post; // so that we don't accidentally explode the global
|
|
|
|
$tags['og:type'] = 'article';
|
|
if ( empty( $data->post_title ) ) {
|
|
$tags['og:title'] = ' ';
|
|
} else {
|
|
/** This filter is documented in core/src/wp-includes/post-template.php */
|
|
$tags['og:title'] = wp_kses( apply_filters( 'the_title', $data->post_title, $data->ID ), array() );
|
|
}
|
|
|
|
$tags['og:url'] = get_permalink( $data->ID );
|
|
if ( ! post_password_required() ) {
|
|
if ( ! empty( $data->post_excerpt ) ) {
|
|
$tags['og:description'] = preg_replace( '@https?://[\S]+@', '', strip_shortcodes( wp_kses( $data->post_excerpt, array() ) ) );
|
|
} else {
|
|
$exploded_content_on_more_tag = explode( '<!--more-->', $data->post_content );
|
|
$tags['og:description'] = wp_trim_words( preg_replace( '@https?://[\S]+@', '', strip_shortcodes( wp_kses( $exploded_content_on_more_tag[0], array() ) ) ) );
|
|
}
|
|
}
|
|
if ( empty( $tags['og:description'] ) ) {
|
|
/**
|
|
* Filter the fallback `og:description` used when no excerpt information is provided.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 3.9.0
|
|
*
|
|
* @param string $var Fallback og:description. Default is translated `Visit the post for more'.
|
|
* @param object $data Post object for the current post.
|
|
*/
|
|
$tags['og:description'] = apply_filters( 'jetpack_open_graph_fallback_description', __( 'Visit the post for more.', 'jetpack' ), $data );
|
|
} else {
|
|
// Intentionally not using a filter to prevent pollution. @see https://github.com/Automattic/jetpack/pull/2899#issuecomment-151957382
|
|
$tags['og:description'] = wp_kses( trim( convert_chars( wptexturize( $tags['og:description'] ) ) ), array() );
|
|
}
|
|
|
|
$tags['article:published_time'] = date( 'c', strtotime( $data->post_date_gmt ) );
|
|
$tags['article:modified_time'] = date( 'c', strtotime( $data->post_modified_gmt ) );
|
|
if ( post_type_supports( get_post_type( $data ), 'author' ) && isset( $data->post_author ) ) {
|
|
$publicize_facebook_user = get_post_meta( $data->ID, '_publicize_facebook_user', true );
|
|
if ( ! empty( $publicize_facebook_user ) ) {
|
|
$tags['article:author'] = esc_url( $publicize_facebook_user );
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Allow plugins to inject additional template-specific Open Graph tags.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 3.0.0
|
|
*
|
|
* @param array $tags Array of Open Graph Meta tags.
|
|
* @param array $args Array of image size parameters.
|
|
*/
|
|
$tags = apply_filters( 'jetpack_open_graph_base_tags', $tags, compact( 'image_width', 'image_height' ) );
|
|
|
|
// Re-enable widont if we had disabled it
|
|
if ( $disable_widont )
|
|
add_filter( 'the_title', 'widont' );
|
|
|
|
/**
|
|
* Do not return any Open Graph Meta tags if we don't have any info about a post.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 3.0.0
|
|
*
|
|
* @param bool true Do not return any Open Graph Meta tags if we don't have any info about a post.
|
|
*/
|
|
if ( empty( $tags ) && apply_filters( 'jetpack_open_graph_return_if_empty', true ) )
|
|
return;
|
|
|
|
$tags['og:site_name'] = get_bloginfo( 'name' );
|
|
|
|
// Get image info and build tags
|
|
if ( ! post_password_required() ) {
|
|
$image_info = jetpack_og_get_image( $image_width, $image_height );
|
|
$tags['og:image'] = $image_info['src'];
|
|
|
|
if ( ! empty( $image_info['width'] ) ) {
|
|
$tags['og:image:width'] = $image_info['width'];
|
|
}
|
|
if ( ! empty( $image_info['height'] ) ) {
|
|
$tags['og:image:height'] = $image_info['height'];
|
|
}
|
|
}
|
|
|
|
// Facebook whines if you give it an empty title
|
|
if ( empty( $tags['og:title'] ) )
|
|
$tags['og:title'] = __( '(no title)', 'jetpack' );
|
|
|
|
// Shorten the description if it's too long
|
|
if ( isset( $tags['og:description'] ) ) {
|
|
$tags['og:description'] = strlen( $tags['og:description'] ) > $description_length ? mb_substr( $tags['og:description'], 0, $description_length ) . '…' : $tags['og:description'];
|
|
}
|
|
|
|
// Try to add OG locale tag if the WP->FB data mapping exists
|
|
if ( defined( 'JETPACK__GLOTPRESS_LOCALES_PATH' ) && file_exists( JETPACK__GLOTPRESS_LOCALES_PATH ) ) {
|
|
require_once JETPACK__GLOTPRESS_LOCALES_PATH;
|
|
$_locale = get_locale();
|
|
|
|
// We have to account for w.org vs WP.com locale divergence
|
|
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
|
|
$gp_locale = GP_Locales::by_field( 'slug', $_locale );
|
|
} else {
|
|
$gp_locale = GP_Locales::by_field( 'wp_locale', $_locale );
|
|
}
|
|
}
|
|
|
|
if ( isset( $gp_locale->facebook_locale ) && ! empty( $gp_locale->facebook_locale ) ) {
|
|
$tags['og:locale'] = $gp_locale->facebook_locale;
|
|
}
|
|
|
|
/**
|
|
* Allow the addition of additional Open Graph Meta tags, or modify the existing tags.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param array $tags Array of Open Graph Meta tags.
|
|
* @param array $args Array of image size parameters.
|
|
*/
|
|
$tags = apply_filters( 'jetpack_open_graph_tags', $tags, compact( 'image_width', 'image_height' ) );
|
|
|
|
// secure_urls need to go right after each og:image to work properly so we will abstract them here
|
|
$secure = $tags['og:image:secure_url'] = ( empty( $tags['og:image:secure_url'] ) ) ? '' : $tags['og:image:secure_url'];
|
|
unset( $tags['og:image:secure_url'] );
|
|
$secure_image_num = 0;
|
|
|
|
foreach ( (array) $tags as $tag_property => $tag_content ) {
|
|
// to accommodate multiple images
|
|
$tag_content = (array) $tag_content;
|
|
$tag_content = array_unique( $tag_content );
|
|
|
|
foreach ( $tag_content as $tag_content_single ) {
|
|
if ( empty( $tag_content_single ) )
|
|
continue; // Don't ever output empty tags
|
|
$og_tag = sprintf( '<meta property="%s" content="%s" />', esc_attr( $tag_property ), esc_attr( $tag_content_single ) );
|
|
/**
|
|
* Filter the HTML Output of each Open Graph Meta tag.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param string $og_tag HTML HTML Output of each Open Graph Meta tag.
|
|
*/
|
|
$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
|
|
$og_output .= "\n";
|
|
|
|
if ( 'og:image' == $tag_property ) {
|
|
if ( is_array( $secure ) && !empty( $secure[$secure_image_num] ) ) {
|
|
$og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure[ $secure_image_num ] ) );
|
|
/** This filter is documented in functions.opengraph.php */
|
|
$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
|
|
$og_output .= "\n";
|
|
} else if ( !is_array( $secure ) && !empty( $secure ) ) {
|
|
$og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure ) );
|
|
/** This filter is documented in functions.opengraph.php */
|
|
$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
|
|
$og_output .= "\n";
|
|
}
|
|
$secure_image_num++;
|
|
}
|
|
}
|
|
}
|
|
echo $og_output;
|
|
}
|
|
|
|
function jetpack_og_get_image( $width = 200, $height = 200, $max_images = 4 ) { // Facebook requires thumbnails to be a minimum of 200x200
|
|
$image = '';
|
|
|
|
if ( is_singular() && ! is_home() ) {
|
|
global $post;
|
|
$image = '';
|
|
|
|
// Grab obvious image if $post is an attachment page for an image
|
|
if ( is_attachment( $post->ID ) && 'image' == substr( $post->post_mime_type, 0, 5 ) ) {
|
|
$image = wp_get_attachment_url( $post->ID );
|
|
}
|
|
|
|
// Attempt to find something good for this post using our generalized PostImages code
|
|
if ( ! $image && class_exists( 'Jetpack_PostImages' ) ) {
|
|
$post_images = Jetpack_PostImages::get_images( $post->ID, array( 'width' => $width, 'height' => $height ) );
|
|
if ( $post_images && ! is_wp_error( $post_images ) ) {
|
|
$image = array();
|
|
foreach ( (array) $post_images as $post_image ) {
|
|
$image['src'] = $post_image['src'];
|
|
if ( isset( $post_image['src_width'], $post_image['src_height'] ) ) {
|
|
$image['width'] = $post_image['src_width'];
|
|
$image['height'] = $post_image['src_height'];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else if ( is_author() ) {
|
|
$author = get_queried_object();
|
|
if ( function_exists( 'get_avatar_url' ) ) {
|
|
// Prefer the core function get_avatar_url() if available, WP 4.2+
|
|
$image['src'] = get_avatar_url( $author->user_email, array( 'size' => $width ) );
|
|
}
|
|
else {
|
|
$has_filter = has_filter( 'pre_option_show_avatars', '__return_true' );
|
|
if ( ! $has_filter ) {
|
|
add_filter( 'pre_option_show_avatars', '__return_true' );
|
|
}
|
|
$avatar = get_avatar( $author->user_email, $width );
|
|
if ( ! $has_filter ) {
|
|
remove_filter( 'pre_option_show_avatars', '__return_true' );
|
|
}
|
|
|
|
if ( ! empty( $avatar ) && ! is_wp_error( $avatar ) ) {
|
|
if ( preg_match( '/src=["\']([^"\']+)["\']/', $avatar, $matches ) );
|
|
$image['src'] = wp_specialchars_decode( $matches[1], ENT_QUOTES );
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( empty( $image ) ) {
|
|
$image = array();
|
|
} else if ( ! is_array( $image ) ) {
|
|
$image = array(
|
|
'src' => $image
|
|
);
|
|
}
|
|
|
|
// First fall back, blavatar
|
|
if ( empty( $image ) && function_exists( 'blavatar_domain' ) ) {
|
|
$blavatar_domain = blavatar_domain( site_url() );
|
|
if ( blavatar_exists( $blavatar_domain ) ) {
|
|
$image['src'] = blavatar_url( $blavatar_domain, 'img', $width, false, true );
|
|
$image['width'] = $width;
|
|
$image['height'] = $height;
|
|
}
|
|
}
|
|
|
|
// Second fall back, Site Logo
|
|
if ( empty( $image ) && ( function_exists( 'jetpack_has_site_logo' ) && jetpack_has_site_logo() ) ) {
|
|
$image['src'] = jetpack_get_site_logo( 'url' );
|
|
$image_dimensions = jetpack_get_site_logo_dimensions();
|
|
if ( ! empty( $image_dimensions ) ) {
|
|
$image['width'] = $image_dimensions['width'];
|
|
$image['height'] = $image_dimensions['height'];
|
|
}
|
|
}
|
|
|
|
// Third fall back, Core Site Icon. Added in WP 4.3.
|
|
if ( empty( $image ) && ( function_exists( 'has_site_icon') && has_site_icon() ) ) {
|
|
$image['src'] = get_site_icon_url( 512 );
|
|
$image['width'] = '512';
|
|
$image['height'] = '512';
|
|
}
|
|
|
|
// Finally fall back, blank image
|
|
if ( empty( $image ) ) {
|
|
/**
|
|
* Filter the default Open Graph Image tag, used when no Image can be found in a post.
|
|
*
|
|
* @since 3.0.0
|
|
*
|
|
* @param string $str Default Image URL.
|
|
*/
|
|
$image['src'] = apply_filters( 'jetpack_open_graph_image_default', 'https://s0.wp.com/i/blank.jpg' );
|
|
}
|
|
|
|
return $image;
|
|
}
|
|
|
|
/**
|
|
* @param $email
|
|
* @param $width
|
|
* @return array|bool|mixed|string
|
|
*/
|
|
function jetpack_og_get_image_gravatar( $email, $width ) {
|
|
$image = '';
|
|
if ( function_exists( 'get_avatar_url' ) ) {
|
|
$avatar = get_avatar_url( $email, $width );
|
|
if ( ! empty( $avatar ) ) {
|
|
if ( is_array( $avatar ) )
|
|
$image = $avatar[0];
|
|
else
|
|
$image = $avatar;
|
|
}
|
|
} else {
|
|
$has_filter = has_filter( 'pre_option_show_avatars', '__return_true' );
|
|
if ( !$has_filter ) {
|
|
add_filter( 'pre_option_show_avatars', '__return_true' );
|
|
}
|
|
$avatar = get_avatar( $email, $width );
|
|
|
|
if ( !$has_filter ) {
|
|
remove_filter( 'pre_option_show_avatars', '__return_true' );
|
|
}
|
|
|
|
if ( !empty( $avatar ) && !is_wp_error( $avatar ) ) {
|
|
if ( preg_match( '/src=["\']([^"\']+)["\']/', $avatar, $matches ) )
|
|
$image = wp_specialchars_decode($matches[1], ENT_QUOTES);
|
|
}
|
|
}
|
|
|
|
return $image;
|
|
}
|