| 1 |
<?php |
| 2 |
/** |
| 3 |
* Plugin Name: Open Graph |
| 4 |
* Plugin URI: https://wordpress.org/plugins/opengraph |
| 5 |
* Description: Adds Open Graph metadata to your pages |
| 6 |
* Author: Will Norris & Matthias Pfefferle |
| 7 |
* Author URI: https://github.com/pfefferle/wordpress-opengraph |
| 8 |
* Version: 2.0.0 |
| 9 |
* License: Apache License, Version 2.0 |
| 10 |
* License URI: http://www.apache.org/licenses/LICENSE-2.0.html |
| 11 |
* Text Domain: opengraph |
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* |
| 13 |
* @package opengraph |
| 14 |
*/ |
| 15 |
|
| 16 |
// If you have the opengraph plugin running alongside jetpack, we assume you'd |
| 17 |
// rather use our opengraph support, so disable jetpack's opengraph functionality. |
| 18 |
add_filter( 'jetpack_enable_opengraph', '__return_false' ); |
| 19 |
add_filter( 'jetpack_enable_open_graph', '__return_false' ); |
| 20 |
|
| 21 |
|
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// Disable strict mode by default. |
| 23 |
defined( 'OPENGRAPH_STRICT_MODE' ) || define( 'OPENGRAPH_STRICT_MODE', false ); |
| 24 |
|
| 25 |
|
| 26 |
/** |
| 27 |
* Add Open Graph XML prefix to <html> element. |
| 28 |
* |
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* @uses apply_filters calls 'opengraph_prefixes' filter on RDFa prefix array |
| 30 |
* |
| 31 |
* @param string $output The current list of prefixes. |
| 32 |
* |
| 33 |
* @return string The updated list of prefixes. |
| 34 |
*/ |
| 35 |
function opengraph_add_prefix( $output ) { |
| 36 |
$prefixes = array( |
| 37 |
'og' => 'http://ogp.me/ns#', |
| 38 |
); |
| 39 |
$prefixes = apply_filters( 'opengraph_prefixes', $prefixes ); |
| 40 |
|
| 41 |
$prefix_str = ''; |
| 42 |
foreach ( $prefixes as $k => $v ) { |
| 43 |
$prefix_str .= $k . ': ' . $v . ' '; |
| 44 |
} |
| 45 |
$prefix_str = trim( $prefix_str ); |
| 46 |
|
| 47 |
if ( preg_match( '/(prefix\s*=\s*[\"|\'])/i', $output ) ) { |
| 48 |
$output = preg_replace( '/(prefix\s*=\s*[\"|\'])/i', '${1}' . $prefix_str, $output ); |
| 49 |
} else { |
| 50 |
$output .= ' prefix="' . esc_attr( $prefix_str ) . '"'; |
| 51 |
} |
| 52 |
|
| 53 |
return $output; |
| 54 |
} |
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add_filter( 'language_attributes', 'opengraph_add_prefix' ); |
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|
| 57 |
|
| 58 |
/** |
| 59 |
* Add additional prefix namespaces that are supported by the opengraph plugin. |
| 60 |
* |
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* @param array $prefixes The current list of prefixes. |
| 62 |
* |
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* @return array The updated list of prefixes. |
| 64 |
*/ |
| 65 |
function opengraph_additional_prefixes( $prefixes ) { |
| 66 |
if ( is_author() ) { |
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$prefixes['profile'] = 'http://ogp.me/ns/profile#'; |
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} |
| 69 |
if ( is_singular() ) { |
| 70 |
$prefixes['article'] = 'http://ogp.me/ns/article#'; |
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} |
| 72 |
|
| 73 |
return $prefixes; |
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} |
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|
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|
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/** |
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* Get the Open Graph metadata for the current page. |
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* |
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* @uses apply_filters() Calls 'opengraph_{$name}' for each property name |
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* @uses apply_filters() Calls 'twitter_{$name}' for each property name |
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* @uses apply_filters() Calls 'opengraph_metadata' before returning metadata array |
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*/ |
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function opengraph_metadata() { |
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$metadata = array(); |
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|
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// Default properties defined at http://ogp.me/. |
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$properties = array( |
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// Required properties. |
| 90 |
'title' => '', |
| 91 |
'type' => '', |
| 92 |
'image' => array(), |
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'url' => '', |
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|
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// Optional properties. |
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'audio' => array(), |
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'description' => '', |
| 98 |
'determiner' => '', |
| 99 |
'locale' => '', |
| 100 |
'site_name' => '', |
| 101 |
'video' => array(), |
| 102 |
); |
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|
| 104 |
foreach ( $properties as $property => $default ) { |
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$filter = 'opengraph_' . $property; |
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|
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/** |
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* Filter the Open Graph metadata. |
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* |
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* @param array $default The default value. |
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*/ |
| 112 |
$metadata[ "og:$property" ] = apply_filters( $filter, $default ); |
| 113 |
} |
| 114 |
|
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$twitter_properties = array( |
| 116 |
'card' => '', |
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'creator' => '', |
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); |
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|
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foreach ( $twitter_properties as $property => $default ) { |
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$filter = 'twitter_' . $property; |
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|
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/** |
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* Filter the Twitter Card metadata. |
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* |
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* @param array $default The default value. |
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*/ |
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$metadata[ "twitter:$property" ] = apply_filters( $filter, $default ); |
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} |
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|
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$fediverse_properties = array( |
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'creator' => array(), |
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); |
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|
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foreach ( $fediverse_properties as $property => $default ) { |
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$filter = 'fediverse_' . $property; |
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|
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/** |
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* Filter the Fediverse metadata. |
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* |
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* @param array $default The default value. |
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*/ |
| 143 |
$metadata[ "fediverse:$property" ] = apply_filters( $filter, $default ); |
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} |
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|
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/** |
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* Filter the Open Graph metadata. |
| 148 |
* |
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* @param array $metadata The metadata array. |
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*/ |
| 151 |
return apply_filters( 'opengraph_metadata', $metadata ); |
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} |
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|
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|
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/** |
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* Register filters for default Open Graph metadata. |
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*/ |
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function opengraph_default_metadata() { |
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// Core metadata attributes. |
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add_filter( 'opengraph_title', 'opengraph_default_title', 5 ); |
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add_filter( 'opengraph_type', 'opengraph_default_type', 5 ); |
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add_filter( 'opengraph_url', 'opengraph_default_url', 5 ); |
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|
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// Image metadata attributes with fallbacks. |
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add_filter( 'opengraph_image', 'opengraph_default_image', 5 ); |
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add_filter( 'opengraph_image', 'opengraph_block_image', 15 ); |
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add_filter( 'opengraph_image', 'opengraph_parsed_image', 25 ); |
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add_filter( 'opengraph_image', 'opengraph_attached_image', 25 ); |
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add_filter( 'opengraph_image', 'opengraph_fallback_image', 35 ); |
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|
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add_filter( 'opengraph_description', 'opengraph_default_description', 5 ); |
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add_filter( 'opengraph_locale', 'opengraph_default_locale', 5 ); |
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add_filter( 'opengraph_site_name', 'opengraph_default_sitename', 5 ); |
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add_filter( 'opengraph_audio', 'opengraph_default_audio', 5 ); |
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add_filter( 'opengraph_video', 'opengraph_default_video', 5 ); |
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|
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// Additional prefixes. |
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add_filter( 'opengraph_prefixes', 'opengraph_additional_prefixes' ); |
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|
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// Additional profile metadata. |
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add_filter( 'opengraph_metadata', 'opengraph_profile_metadata' ); |
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|
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// Additional article metadata. |
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add_filter( 'opengraph_metadata', 'opengraph_article_metadata' ); |
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|
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// twitter card metadata. |
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add_filter( 'twitter_card', 'twitter_default_card', 5 ); |
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add_filter( 'twitter_creator', 'twitter_default_creator', 5 ); |
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|
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// fediverse creator metadata. |
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add_filter( 'fediverse_creator', 'fediverse_default_creator', 5 ); |
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} |
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add_action( 'wp', 'opengraph_default_metadata' ); |
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|
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|
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/** |
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* Default title property, using the page title. |
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* |
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* @param string $title The current title. |
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* |
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* @return string The title. |
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*/ |
| 203 |
function opengraph_default_title( $title ) { |
| 204 |
if ( $title ) { |
| 205 |
return $title; |
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} |
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|
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// Set default title, because twitter is requiring one. |
| 209 |
$title = __( 'Untitled', 'opengraph' ); |
| 210 |
|
| 211 |
if ( is_home() || is_front_page() ) { |
| 212 |
$title = get_bloginfo( 'name' ); |
| 213 |
} elseif ( is_singular() ) { |
| 214 |
$title = get_the_title( get_queried_object_id() ); |
| 215 |
// Fall back to description. |
| 216 |
if ( empty( $title ) ) { |
| 217 |
$title = opengraph_default_description( null, 5 ); |
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} |
| 219 |
} elseif ( is_author() ) { |
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$author = get_queried_object(); |
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$title = $author->display_name; |
| 222 |
} elseif ( is_category() && single_cat_title( '', false ) ) { |
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$title = single_cat_title( '', false ); |
| 224 |
} elseif ( is_tag() && single_tag_title( '', false ) ) { |
| 225 |
$title = single_tag_title( '', false ); |
| 226 |
} elseif ( is_archive() && get_post_format() ) { |
| 227 |
$title = get_post_format_string( get_post_format() ); |
| 228 |
} elseif ( |
| 229 |
is_archive() && |
| 230 |
function_exists( 'get_the_archive_title' ) && |
| 231 |
get_the_archive_title() |
| 232 |
) { // New in version 4.1 to get all other archive titles. |
| 233 |
$title = get_the_archive_title(); |
| 234 |
} |
| 235 |
|
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return wp_strip_all_tags( $title ); |
| 237 |
} |
| 238 |
|
| 239 |
|
| 240 |
/** |
| 241 |
* Default type property. |
| 242 |
* |
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* @param string $type The current type. |
| 244 |
* |
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* @return string The type. |
| 246 |
*/ |
| 247 |
function opengraph_default_type( $type = '' ) { |
| 248 |
if ( empty( $type ) ) { |
| 249 |
if ( is_singular( array( 'post', 'page' ) ) ) { |
| 250 |
$type = 'article'; |
| 251 |
} elseif ( is_author() ) { |
| 252 |
$type = 'profile'; |
| 253 |
} else { |
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$type = 'website'; |
| 255 |
} |
| 256 |
} |
| 257 |
|
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return $type; |
| 259 |
} |
| 260 |
|
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|
| 262 |
/** |
| 263 |
* Default image property, using the post-thumbnail and any attached images. |
| 264 |
* |
| 265 |
* @param array $image The current list of images. |
| 266 |
* |
| 267 |
* @return array The list of images. |
| 268 |
*/ |
| 269 |
function opengraph_default_image( $image = array() ) { |
| 270 |
// Show avatar on profile pages. |
| 271 |
if ( is_author() ) { |
| 272 |
return array( get_avatar_url( get_the_author_meta( 'ID' ), array( 'size' => 512 ) ) ); |
| 273 |
} |
| 274 |
|
| 275 |
if ( count( $image ) >= opengraph_max_images() ) { |
| 276 |
return $image; |
| 277 |
} |
| 278 |
|
| 279 |
if ( is_attachment() && wp_attachment_is_image() ) { |
| 280 |
$id = get_queried_object_id(); |
| 281 |
$image[] = current( wp_get_attachment_image_src( $id, 'large' ) ?: array() ); // phpcs:ignore |
| 282 |
} elseif ( is_singular() && ! is_attachment() ) { |
| 283 |
$id = get_queried_object_id(); |
| 284 |
|
| 285 |
// List post thumbnail first if this post has one. |
| 286 |
if ( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail( $id ) ) { |
| 287 |
$thumbnail_id = get_post_thumbnail_id( $id ); |
| 288 |
$image[] = current( wp_get_attachment_image_src( $thumbnail_id, 'large' ) ?: array() ); // phpcs:ignore |
| 289 |
} |
| 290 |
} |
| 291 |
|
| 292 |
return array_unique( $image ); |
| 293 |
} |
| 294 |
|
| 295 |
|
| 296 |
/** |
| 297 |
* Block image property, using the first image in the post content. |
| 298 |
* |
| 299 |
* @param array $image The current list of images. |
| 300 |
* |
| 301 |
* @return array The list of images. |
| 302 |
*/ |
| 303 |
function opengraph_block_image( $image = array() ) { |
| 304 |
if ( |
| 305 |
! opengraph_site_supports_blocks() || |
| 306 |
count( $image ) >= opengraph_max_images() || |
| 307 |
! is_singular() || |
| 308 |
is_attachment() |
| 309 |
) { |
| 310 |
return $image; |
| 311 |
} |
| 312 |
|
| 313 |
// Get the first image in the post content. |
| 314 |
$blocks = parse_blocks( get_the_content( null, false ) ); |
| 315 |
foreach ( $blocks as $block ) { |
| 316 |
if ( |
| 317 |
'core/image' === $block['blockName'] || |
| 318 |
'core/cover' === $block['blockName'] |
| 319 |
) { |
| 320 |
$id = $block['attrs']['id']; |
| 321 |
$image[] = current( wp_get_attachment_image_src( $id, 'large' ) ?: array() ); // phpcs:ignore |
| 322 |
} |
| 323 |
} |
| 324 |
|
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return array_unique( $image ); |
| 326 |
} |
| 327 |
|
| 328 |
|
| 329 |
/** |
| 330 |
* Parse images in the HTML content. |
| 331 |
* |
| 332 |
* @param array $image The current list of images. |
| 333 |
* |
| 334 |
* @return array The list of images. |
| 335 |
*/ |
| 336 |
function opengraph_parsed_image( $image = array() ) { |
| 337 |
// If someone calls that function directly, bail. |
| 338 |
if ( |
| 339 |
! \class_exists( 'WP_HTML_Tag_Processor' ) || |
| 340 |
! opengraph_site_supports_blocks() || |
| 341 |
count( $image ) >= opengraph_max_images() || |
| 342 |
! is_singular() || |
| 343 |
is_attachment() |
| 344 |
) { |
| 345 |
return $image; |
| 346 |
} |
| 347 |
|
| 348 |
$post_id = get_queried_object_id(); |
| 349 |
$base = wp_upload_dir()['baseurl']; |
| 350 |
$content = get_post_field( 'post_content', $post_id ); |
| 351 |
$tags = new WP_HTML_Tag_Processor( $content ); |
| 352 |
|
| 353 |
// This linter warning is a false positive - we have to re-count each time here as we modify $images. |
| 354 |
// phpcs:ignore Squiz.PHP.DisallowSizeFunctionsInLoops.Found |
| 355 |
while ( $tags->next_tag( 'img' ) && ( count( $image ) <= opengraph_max_images() ) ) { |
| 356 |
$src = $tags->get_attribute( 'src' ); |
| 357 |
|
| 358 |
/* |
| 359 |
* If the img source is in our uploads dir, get the |
| 360 |
* associated ID. Note: if there's a -500x500 |
| 361 |
* type suffix, we remove it, but we try the original |
| 362 |
* first in case the original image is actually called |
| 363 |
* that. Likewise, we try adding the -scaled suffix for |
| 364 |
* the case that this is a small version of an image |
| 365 |
* that was big enough to get scaled down on upload: |
| 366 |
* https://make.wordpress.org/core/2019/10/09/introducing-handling-of-big-images-in-wordpress-5-3/ |
| 367 |
*/ |
| 368 |
if ( null === $src || ! str_starts_with( $src, $base ) ) { |
| 369 |
continue; |
| 370 |
} |
| 371 |
|
| 372 |
$img_id = attachment_url_to_postid( $src ); |
| 373 |
|
| 374 |
if ( 0 === $img_id ) { |
| 375 |
$count = 0; |
| 376 |
$src = strtok( $src, '?' ); |
| 377 |
$img_id = attachment_url_to_postid( $src ); |
| 378 |
} |
| 379 |
|
| 380 |
if ( 0 === $img_id ) { |
| 381 |
$count = 0; |
| 382 |
$src = preg_replace( '/-(?:\d+x\d+)(\.[a-zA-Z]+)$/', '$1', $src, 1, $count ); |
| 383 |
if ( $count > 0 ) { |
| 384 |
$img_id = attachment_url_to_postid( $src ); |
| 385 |
} |
| 386 |
} |
| 387 |
|
| 388 |
if ( 0 === $img_id ) { |
| 389 |
$src = preg_replace( '/(\.[a-zA-Z]+)$/', '-scaled$1', $src ); |
| 390 |
$img_id = attachment_url_to_postid( $src ); |
| 391 |
} |
| 392 |
|
| 393 |
if ( 0 !== $img_id ) { |
| 394 |
$image[] = current( wp_get_attachment_image_src( $img_id, 'large' ) ?: array() ); // phpcs:ignore |
| 395 |
} |
| 396 |
} |
| 397 |
|
| 398 |
return array_unique( $image ); |
| 399 |
} |
| 400 |
|
| 401 |
|
| 402 |
/** |
| 403 |
* Attached images. |
| 404 |
* |
| 405 |
* @param array $image The current list of images. |
| 406 |
* |
| 407 |
* @return array The list of images. |
| 408 |
*/ |
| 409 |
function opengraph_attached_image( $image = array() ) { |
| 410 |
$max_images = opengraph_max_images(); |
| 411 |
|
| 412 |
if ( |
| 413 |
count( $image ) >= $max_images || |
| 414 |
! is_singular() || is_attachment() |
| 415 |
) { |
| 416 |
return $image; |
| 417 |
} |
| 418 |
|
| 419 |
$id = get_queried_object_id(); |
| 420 |
|
| 421 |
$query = new WP_Query( |
| 422 |
array( |
| 423 |
'post_parent' => $id, |
| 424 |
'post_status' => 'inherit', |
| 425 |
'post_type' => 'attachment', |
| 426 |
'post_mime_type' => 'image', |
| 427 |
'order' => 'ASC', |
| 428 |
'orderby' => 'menu_order ID', |
| 429 |
'fields' => 'ids', |
| 430 |
'posts_per_page' => $max_images, |
| 431 |
) |
| 432 |
); |
| 433 |
|
| 434 |
$image_ids = $query->get_posts(); |
| 435 |
|
| 436 |
// Get URLs for each image. |
| 437 |
foreach ( $image_ids as $id ) { |
| 438 |
$thumbnail = wp_get_attachment_image_src( $id, 'large' ); |
| 439 |
if ( $thumbnail ) { |
| 440 |
$image[] = $thumbnail[0]; |
| 441 |
} |
| 442 |
} |
| 443 |
|
| 444 |
return array_unique( $image ); |
| 445 |
} |
| 446 |
|
| 447 |
/** |
| 448 |
* Fallback image property, using the site icon, custom logo, or header images. |
| 449 |
* |
| 450 |
* @param array $image The current list of images. |
| 451 |
* |
| 452 |
* @return array The list of images. |
| 453 |
*/ |
| 454 |
function opengraph_fallback_image( $image = array() ) { |
| 455 |
if ( $image ) { |
| 456 |
return $image; |
| 457 |
} |
| 458 |
|
| 459 |
$max_images = opengraph_max_images(); |
| 460 |
|
| 461 |
// Try site icon. |
| 462 |
if ( function_exists( 'get_site_icon_url' ) && has_site_icon() ) { |
| 463 |
$image[] = get_site_icon_url( 512 ); |
| 464 |
} |
| 465 |
|
| 466 |
// Try custom logo second. |
| 467 |
if ( empty( $image ) ) { |
| 468 |
$custom_logo = get_theme_mod( 'custom_logo' ); |
| 469 |
$image[] = wp_get_attachment_image_src( $custom_logo, 'large' ); |
| 470 |
} |
| 471 |
|
| 472 |
// Try header images. |
| 473 |
if ( empty( $image ) && function_exists( 'get_uploaded_header_images' ) ) { |
| 474 |
if ( is_random_header_image() ) { |
| 475 |
foreach ( get_uploaded_header_images() as $header_image ) { |
| 476 |
$image[] = $header_image['url']; |
| 477 |
if ( count( $image ) >= $max_images ) { |
| 478 |
break; |
| 479 |
} |
| 480 |
} |
| 481 |
} elseif ( get_header_image() ) { |
| 482 |
$image[] = get_header_image(); |
| 483 |
} |
| 484 |
} |
| 485 |
|
| 486 |
return array_unique( $image ); |
| 487 |
} |
| 488 |
|
| 489 |
|
| 490 |
/** |
| 491 |
* Default audio property, using get_attached_media. |
| 492 |
* |
| 493 |
* @param array $audio The current list of audio files. |
| 494 |
* |
| 495 |
* @return array The list of audio files. |
| 496 |
*/ |
| 497 |
function opengraph_default_audio( $audio = array() ) { |
| 498 |
$id = get_queried_object_id(); |
| 499 |
$attachments = get_attached_media( 'audio', $id ); |
| 500 |
|
| 501 |
if ( empty( $attachments ) ) { |
| 502 |
return $audio; |
| 503 |
} |
| 504 |
|
| 505 |
foreach ( $attachments as $attachment ) { |
| 506 |
$audio[] = wp_get_attachment_url( $attachment->ID ); |
| 507 |
} |
| 508 |
|
| 509 |
return $audio; |
| 510 |
} |
| 511 |
|
| 512 |
|
| 513 |
/** |
| 514 |
* Default video property, using get_attached_media. |
| 515 |
* |
| 516 |
* @param array $video The current list of video files. |
| 517 |
* |
| 518 |
* @return array The list of video files. |
| 519 |
*/ |
| 520 |
function opengraph_default_video( $video = array() ) { |
| 521 |
$id = get_queried_object_id(); |
| 522 |
$attachments = get_attached_media( 'video', $id ); |
| 523 |
|
| 524 |
if ( empty( $attachments ) ) { |
| 525 |
return $video; |
| 526 |
} |
| 527 |
|
| 528 |
foreach ( $attachments as $attachment ) { |
| 529 |
$video[] = wp_get_attachment_url( $attachment->ID ); |
| 530 |
} |
| 531 |
|
| 532 |
return $video; |
| 533 |
} |
| 534 |
|
| 535 |
|
| 536 |
/** |
| 537 |
* Default url property, using the permalink for the page. |
| 538 |
* |
| 539 |
* @param string $url The current URL. |
| 540 |
* |
| 541 |
* @return string The URL. |
| 542 |
*/ |
| 543 |
function opengraph_default_url( $url = '' ) { |
| 544 |
if ( empty( $url ) ) { |
| 545 |
if ( is_singular() ) { |
| 546 |
$url = get_permalink(); |
| 547 |
} elseif ( is_author() ) { |
| 548 |
$url = get_author_posts_url( get_queried_object_id() ); |
| 549 |
} |
| 550 |
} |
| 551 |
|
| 552 |
return esc_url( $url ); |
| 553 |
} |
| 554 |
|
| 555 |
|
| 556 |
/** |
| 557 |
* Default site_name property, using the bloginfo name. |
| 558 |
* |
| 559 |
* @param string $name The current site name. |
| 560 |
* |
| 561 |
* @return string The site name. |
| 562 |
*/ |
| 563 |
function opengraph_default_sitename( $name = '' ) { |
| 564 |
if ( empty( $name ) ) { |
| 565 |
$name = get_bloginfo( 'name' ); |
| 566 |
} |
| 567 |
|
| 568 |
return wp_strip_all_tags( $name ); |
| 569 |
} |
| 570 |
|
| 571 |
|
| 572 |
/** |
| 573 |
* Default description property, using the excerpt or content for posts, or the |
| 574 |
* bloginfo description. |
| 575 |
* |
| 576 |
* @param string $description The current description. |
| 577 |
* @param int $length The maximum length of the description. |
| 578 |
* |
| 579 |
* @return string The description. |
| 580 |
*/ |
| 581 |
function opengraph_default_description( $description = '', $length = 55 ) { |
| 582 |
if ( $description ) { |
| 583 |
return $description; |
| 584 |
} |
| 585 |
|
| 586 |
if ( is_singular() ) { |
| 587 |
$post = get_queried_object(); |
| 588 |
if ( post_password_required( $post ) ) { |
| 589 |
$description = __( 'This content is password protected.', 'opengraph' ); |
| 590 |
} elseif ( ! empty( $post->post_excerpt ) ) { |
| 591 |
$description = $post->post_excerpt; |
| 592 |
} else { |
| 593 |
$description = $post->post_content; |
| 594 |
} |
| 595 |
} elseif ( is_author() ) { |
| 596 |
$id = get_queried_object_id(); |
| 597 |
$description = get_user_meta( $id, 'description', true ); |
| 598 |
} elseif ( is_category() && category_description() ) { |
| 599 |
$description = category_description(); |
| 600 |
} elseif ( is_tag() && tag_description() ) { |
| 601 |
$description = tag_description(); |
| 602 |
} elseif ( |
| 603 |
is_archive() && |
| 604 |
function_exists( 'get_the_archive_description' ) && |
| 605 |
get_the_archive_description() |
| 606 |
) { // New in version 4.1 to get all other archive descriptions. |
| 607 |
$description = get_the_archive_description(); |
| 608 |
} else { |
| 609 |
$description = get_bloginfo( 'description' ); |
| 610 |
} |
| 611 |
|
| 612 |
// strip description to first 55 words. |
| 613 |
$description = wp_strip_all_tags( strip_shortcodes( $description ) ); |
| 614 |
$description = opengraph_trim_text( $description, $length ); |
| 615 |
|
| 616 |
return wp_strip_all_tags( $description ); |
| 617 |
} |
| 618 |
|
| 619 |
|
| 620 |
/** |
| 621 |
* Default locale property, using the WordPress locale. |
| 622 |
* |
| 623 |
* @param string $locale The current locale. |
| 624 |
* |
| 625 |
* @return string The locale. |
| 626 |
*/ |
| 627 |
function opengraph_default_locale( $locale = '' ) { |
| 628 |
if ( empty( $locale ) ) { |
| 629 |
$locale = get_locale(); |
| 630 |
} |
| 631 |
|
| 632 |
return $locale; |
| 633 |
} |
| 634 |
|
| 635 |
|
| 636 |
/** |
| 637 |
* Default twitter-card type. |
| 638 |
* |
| 639 |
* @param string $card The current card type. |
| 640 |
* |
| 641 |
* @return string The card type. |
| 642 |
*/ |
| 643 |
function twitter_default_card( $card = '' ) { |
| 644 |
if ( $card ) { |
| 645 |
return $card; |
| 646 |
} |
| 647 |
|
| 648 |
$card = 'summary'; |
| 649 |
$images = apply_filters( 'opengraph_image', array() ); |
| 650 |
|
| 651 |
// Show large image on... |
| 652 |
if ( is_singular() ) { |
| 653 |
if ( |
| 654 |
// Gallery and image posts. |
| 655 |
in_array( get_post_format(), array( 'image', 'gallery' ), true ) || |
| 656 |
// Posts with more than one image. |
| 657 |
( is_array( $images ) && count( $images ) > 1 ) || |
| 658 |
// Posts with a post-thumbnail. |
| 659 |
( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail() ) |
| 660 |
) { |
| 661 |
$card = 'summary_large_image'; |
| 662 |
} |
| 663 |
} |
| 664 |
|
| 665 |
return $card; |
| 666 |
} |
| 667 |
|
| 668 |
|
| 669 |
/** |
| 670 |
* Default twitter-card creator. |
| 671 |
* |
| 672 |
* @see https://developer.twitter.com/en/docs/twitter-for-websites/cards/guides/getting-started |
| 673 |
* |
| 674 |
* @param string $creator The current creator. |
| 675 |
* |
| 676 |
* @return string The creator. |
| 677 |
*/ |
| 678 |
function twitter_default_creator( $creator = '' ) { |
| 679 |
if ( $creator || ! is_singular() ) { |
| 680 |
return $creator; |
| 681 |
} |
| 682 |
|
| 683 |
$post = get_queried_object(); |
| 684 |
$author = $post->post_author; |
| 685 |
$twitter = get_the_author_meta( 'twitter', $author ); |
| 686 |
|
| 687 |
if ( ! $twitter ) { |
| 688 |
return $creator; |
| 689 |
} |
| 690 |
|
| 691 |
// Check if twitter-account matches "http://twitter.com/username". |
| 692 |
if ( preg_match( '/^http:\/\/twitter\.com\/(#!\/)?(\w+)/i', $twitter, $matches ) ) { |
| 693 |
$creator = '@' . $matches[2]; |
| 694 |
} elseif ( preg_match( '/^@?(\w+)$/i', $twitter, $matches ) ) { // Check if twitter-account matches "(@)username". |
| 695 |
$creator = '@' . $matches[1]; |
| 696 |
} |
| 697 |
|
| 698 |
return $creator; |
| 699 |
} |
| 700 |
|
| 701 |
|
| 702 |
/** |
| 703 |
* Default fediverse creator. |
| 704 |
* |
| 705 |
* @see https://github.com/mastodon/mastodon/pull/30398 |
| 706 |
* |
| 707 |
* @param string $creator The current creator. |
| 708 |
* |
| 709 |
* @return string The creator. |
| 710 |
*/ |
| 711 |
function fediverse_default_creator( $creator = '' ) { |
| 712 |
if ( ! is_singular() ) { |
| 713 |
return $creator; |
| 714 |
} |
| 715 |
|
| 716 |
$post = get_queried_object(); |
| 717 |
$author = $post->post_author; |
| 718 |
$webfinger = get_the_author_meta( 'fediverse', $author ); |
| 719 |
|
| 720 |
if ( ! $webfinger ) { |
| 721 |
return $creator; |
| 722 |
} |
| 723 |
|
| 724 |
$webfinger = ltrim( $webfinger, '@' ); |
| 725 |
$webfinger = str_replace( 'acct:', '', $webfinger ); |
| 726 |
|
| 727 |
return $webfinger; |
| 728 |
} |
| 729 |
|
| 730 |
|
| 731 |
/** |
| 732 |
* Output Open Graph <meta> tags in the page header. |
| 733 |
*/ |
| 734 |
function opengraph_meta_tags() { |
| 735 |
$metadata = opengraph_metadata(); |
| 736 |
foreach ( $metadata as $key => $value ) { |
| 737 |
if ( empty( $key ) || empty( $value ) ) { |
| 738 |
continue; |
| 739 |
} |
| 740 |
$value = (array) $value; |
| 741 |
|
| 742 |
foreach ( $value as $v ) { |
| 743 |
// Skip empty values. |
| 744 |
if ( empty( $v ) ) { |
| 745 |
continue; |
| 746 |
} |
| 747 |
|
| 748 |
// Check if "strict mode" is enabled. |
| 749 |
if ( OPENGRAPH_STRICT_MODE === true ) { |
| 750 |
if ( // Use "name" attribute for Twitter Cards. |
| 751 |
str_starts_with( $key, 'twitter:' ) || |
| 752 |
str_starts_with( $key, 'fediverse:' ) |
| 753 |
) { |
| 754 |
printf( |
| 755 |
'<meta name="%1$s" content="%2$s" />' . PHP_EOL, |
| 756 |
esc_attr( $key ), |
| 757 |
esc_attr( $v ) |
| 758 |
); |
| 759 |
} else { // Use "property" attribute for Open Graph. |
| 760 |
printf( |
| 761 |
'<meta property="%1$s" content="%2$s" />' . PHP_EOL, |
| 762 |
esc_attr( $key ), |
| 763 |
esc_attr( $v ) |
| 764 |
); |
| 765 |
} |
| 766 |
} else { |
| 767 |
// Use the "property" and "name" attributes. |
| 768 |
printf( |
| 769 |
'<meta property="%1$s" name="%1$s" content="%2$s" />' . PHP_EOL, |
| 770 |
esc_attr( $key ), |
| 771 |
esc_attr( $v ) |
| 772 |
); |
| 773 |
} |
| 774 |
} |
| 775 |
} |
| 776 |
} |
| 777 |
add_action( 'wp_head', 'opengraph_meta_tags' ); |
| 778 |
|
| 779 |
|
| 780 |
/** |
| 781 |
* Include profile metadata for author pages. |
| 782 |
* |
| 783 |
* @link http://ogp.me/#type_profile |
| 784 |
* |
| 785 |
* @param array $metadata The current metadata. |
| 786 |
* |
| 787 |
* @return array The updated metadata. |
| 788 |
*/ |
| 789 |
function opengraph_profile_metadata( $metadata ) { |
| 790 |
if ( is_author() ) { |
| 791 |
$id = get_queried_object_id(); |
| 792 |
|
| 793 |
$metadata['profile:first_name'] = get_the_author_meta( 'first_name', $id ); |
| 794 |
$metadata['profile:last_name'] = get_the_author_meta( 'last_name', $id ); |
| 795 |
$metadata['profile:username'] = get_the_author_meta( 'nicename', $id ); |
| 796 |
} |
| 797 |
|
| 798 |
return $metadata; |
| 799 |
} |
| 800 |
|
| 801 |
|
| 802 |
/** |
| 803 |
* Include article metadata for posts and pages. |
| 804 |
* |
| 805 |
* @link http://ogp.me/#type_article |
| 806 |
* |
| 807 |
* @param array $metadata The current metadata. |
| 808 |
* |
| 809 |
* @return array The updated metadata. |
| 810 |
*/ |
| 811 |
function opengraph_article_metadata( $metadata ) { |
| 812 |
if ( ! is_singular() ) { |
| 813 |
return $metadata; |
| 814 |
} |
| 815 |
|
| 816 |
$post = get_queried_object(); |
| 817 |
$author = $post->post_author; |
| 818 |
|
| 819 |
// Check if page/post has tags. |
| 820 |
$tags = wp_get_object_terms( $post->ID, 'post_tag' ); |
| 821 |
if ( $tags && is_array( $tags ) ) { |
| 822 |
foreach ( $tags as $tag ) { |
| 823 |
$metadata['article:tag'][] = $tag->name; |
| 824 |
} |
| 825 |
} |
| 826 |
|
| 827 |
// Check if page/post has categories. |
| 828 |
$categories = wp_get_object_terms( $post->ID, 'category' ); |
| 829 |
if ( $categories && is_array( $categories ) ) { |
| 830 |
$metadata['article:section'][] = current( $categories )->name; |
| 831 |
} |
| 832 |
|
| 833 |
$metadata['article:published_time'] = get_the_time( 'c', $post->ID ); |
| 834 |
$metadata['article:modified_time'] = get_the_modified_time( 'c', $post->ID ); |
| 835 |
$metadata['article:author'][] = get_author_posts_url( $author ); |
| 836 |
|
| 837 |
$facebook = get_the_author_meta( 'facebook', $author ); |
| 838 |
|
| 839 |
if ( ! empty( $facebook ) ) { |
| 840 |
$metadata['article:author'][] = $facebook; |
| 841 |
} |
| 842 |
|
| 843 |
return $metadata; |
| 844 |
} |
| 845 |
|
| 846 |
|
| 847 |
/** |
| 848 |
* Add "twitter" as a contact method |
| 849 |
* |
| 850 |
* @param array $user_contactmethods The current list of contact methods. |
| 851 |
* |
| 852 |
* @return array The updated list of contact methods. |
| 853 |
*/ |
| 854 |
function opengraph_user_contactmethods( $user_contactmethods = array() ) { |
| 855 |
$user_contactmethods['twitter'] = __( 'Twitter', 'opengraph' ); |
| 856 |
$user_contactmethods['facebook'] = __( 'Facebook (Profile URL)', 'opengraph' ); |
| 857 |
$user_contactmethods['fediverse'] = __( 'Fediverse (username@host.tld)', 'opengraph' ); |
| 858 |
|
| 859 |
return $user_contactmethods; |
| 860 |
} |
| 861 |
add_filter( 'user_contactmethods', 'opengraph_user_contactmethods', 1 ); |
| 862 |
|
| 863 |
|
| 864 |
/** |
| 865 |
* Add 512x512 icon size |
| 866 |
* |
| 867 |
* @param array $sizes Sizes available for the site icon. |
| 868 |
* |
| 869 |
* @return array updated list of icons. |
| 870 |
*/ |
| 871 |
function opengraph_site_icon_image_sizes( $sizes ) { |
| 872 |
$sizes[] = 512; |
| 873 |
|
| 874 |
return array_unique( $sizes ); |
| 875 |
} |
| 876 |
add_filter( 'site_icon_image_sizes', 'opengraph_site_icon_image_sizes' ); |
| 877 |
|
| 878 |
|
| 879 |
/** |
| 880 |
* Helper function to trim text using the same default values for length and |
| 881 |
* 'more' text as wp_trim_excerpt. |
| 882 |
* |
| 883 |
* @param string $text The text to trim. |
| 884 |
* @param int $length The maximum number of words to include. |
| 885 |
* |
| 886 |
* @return string The trimmed text. |
| 887 |
*/ |
| 888 |
function opengraph_trim_text( $text, $length = 55 ) { |
| 889 |
$excerpt_length = apply_filters( 'excerpt_length', $length ); |
| 890 |
$excerpt_more = apply_filters( 'excerpt_more', ' [...]' ); |
| 891 |
|
| 892 |
return wp_trim_words( $text, $excerpt_length, $excerpt_more ); |
| 893 |
} |
| 894 |
|
| 895 |
/** |
| 896 |
* Get the maximum number of images to include in Open Graph metadata. |
| 897 |
* |
| 898 |
* @return int The maximum number of images to include. |
| 899 |
*/ |
| 900 |
function opengraph_max_images() { |
| 901 |
/** |
| 902 |
* Filter the maximum number of images to include in Open Graph metadata. |
| 903 |
* |
| 904 |
* As of July 2014, Facebook seems to only let you select from the first 3 images. |
| 905 |
* |
| 906 |
* @param int $max_images The maximum number of images to include. |
| 907 |
*/ |
| 908 |
$max_images = apply_filters( 'opengraph_max_images', 3 ); |
| 909 |
|
| 910 |
// Max images can't be negative or zero. |
| 911 |
if ( $max_images <= 0 ) { |
| 912 |
$max_images = 1; |
| 913 |
} |
| 914 |
|
| 915 |
return $max_images; |
| 916 |
} |
| 917 |
|
| 918 |
/** |
| 919 |
* Check if a site supports the block editor. |
| 920 |
* |
| 921 |
* @return boolean True if the site supports the block editor, false otherwise. |
| 922 |
*/ |
| 923 |
function opengraph_site_supports_blocks() { |
| 924 |
$return = true; |
| 925 |
|
| 926 |
if ( version_compare( get_bloginfo( 'version' ), '5.9', '<' ) ) { |
| 927 |
$return = false; |
| 928 |
} elseif ( function_exists( 'classicpress_version' ) ) { |
| 929 |
$return = false; |
| 930 |
} elseif ( |
| 931 |
! function_exists( 'register_block_type_from_metadata' ) || |
| 932 |
! function_exists( 'do_blocks' ) |
| 933 |
) { |
| 934 |
$return = false; |
| 935 |
} |
| 936 |
|
| 937 |
/** |
| 938 |
* Allow plugins to disable block editor support, |
| 939 |
* thus disabling blocks registered by the OpenGraph plugin. |
| 940 |
* |
| 941 |
* @param boolean $supports_blocks True if the site supports the block editor, false otherwise. |
| 942 |
*/ |
| 943 |
return apply_filters( 'opengraph_site_supports_blocks', $return ); |
| 944 |
} |
| 945 |
|
| 946 |
|
| 947 |
if ( ! function_exists( 'str_starts_with' ) ) { |
| 948 |
/** |
| 949 |
* `str_starts_with` function for PHP < 8.0. |
| 950 |
* |
| 951 |
* @see https://www.php.net/manual/en/function.str-starts-with |
| 952 |
* |
| 953 |
* @param string $haystack The string to search in. |
| 954 |
* @param string $needle The string to search for. |
| 955 |
* |
| 956 |
* @return bool True if the string starts with the needle, false otherwise. |
| 957 |
*/ |
| 958 |
function str_starts_with( $haystack, $needle ) { |
| 959 |
return 0 === strncmp( $haystack, $needle, \strlen( $needle ) ); |
| 960 |
} |
| 961 |
} |
| 962 |
|
