如果我們有需要給WordPress添加Open Graph標(biāo)簽的話，我們可以直接在頭部添加代碼，或者是用 Open Graph 插件，有些SEO插件也是有自帶的。對(duì)于Open Graph標(biāo)簽來說，谷歌等海外的搜索引擎應(yīng)該是比較友好的，看很多外貿(mào)網(wǎng)站有用到，如果我們有谷歌優(yōu)化的外貿(mào)網(wǎng)站建議還是用上，不管是你用代碼還是插件。

實(shí)際上，Open Graph 標(biāo)簽較多部分還是添加在內(nèi)容頁，如果我們有需要的話，可以直接設(shè)定內(nèi)容頁，當(dāng)然也可以用判斷語句設(shè)置home首頁。這里找到一段代碼還是可用的，是國內(nèi)的網(wǎng)友修改的。

1、原版代碼

/**
* WordPress OG協(xié)議 來自 aidiyu
*/
add_action('wp_head', 'starfire',0);
if(!function_exists('starfire')){
function starfire(){

global $wpdb;
$post_id = ( null === $post_id ) ? get_the_ID() : $post_id;
$copy = get_post_meta($post_id , 'author', true);
if (is_singular() && empty($copy)) {date_default_timezone_set('PRC');echo '
<meta property="og:type" content="article"/>
<meta property="article:published_time" content="'.get_the_date('c').'"/>
<meta property="og:release_date" content="'.get_the_date('c').'"/>
<meta property="article:author" content="';bloginfo('name'); echo '" />'; echo '
<meta property="og:author" content="';bloginfo('name');echo '" />'; echo '
<meta property="og:url" content="';the_permalink(); echo '"/>'; echo '
<meta property="og:title" content="'.trim(wp_title('',0)).' | '; bloginfo('name'); echo '" />'; echo '
<meta property="article:published_first" content="';bloginfo('name');echo ','; the_permalink(); echo '" />
<meta property="og:description" content="'.get_the_excerpt().'" />
<meta property="og:image" content="'.get_mypost_thumbnail($post_id).'" />
<meta itemprop="image" content="' . get_mypost_thumbnail($post_id) . '" />';
}
}
}
/**
* WordPress 獲取文章摘要整理版
*/
function get_mypost_excerpt($post_ID,$len){
if (!function_exists('utf8Substr')) {
function utf8Substr($str, $from, $len) {
return preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$from.'}'.
'((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s',
'$1',$str);
}
}
if(!$post_content){
$post = get_post($post_ID);
$post_content = $post->post_content;
}
if ($post->post_excerpt) {
$description = $post->post_excerpt;
} else {
if(preg_match('/<p>(.*)<\/p>/iU',trim(strip_tags($post->post_content,"<p>")),$result)){
$post_content = $result['1'];
} else {
$post_content_r = explode("\n",trim(strip_tags($post->post_content)));
$post_content = $post_content_r['0'];
}
$description = utf8Substr($post_content,0,$len);
return $description;
}
}
/**
* WordPress 獲取文章圖片加強(qiáng)版
*/
function get_mypost_thumbnail($post_ID){
if (has_post_thumbnail()) {
$timthumb_src = wp_get_attachment_image_src( get_post_thumbnail_id($post_ID), 'full' );
$url = $timthumb_src[0];
} else {
if(!$post_content){
$post = get_post($post_ID);
$post_content = $post->post_content;
}
preg_match_all('|<img.*?src=[\'"](.*?)[\'"].*?>|i', do_shortcode($post_content), $matches);
if( $matches && isset($matches[1]) && isset($matches[1][0]) ){
$url = $matches[1][0];
}else{
$url = '';
}
}
return $url;
}

這里還算是比較齊全的，只是設(shè)定在內(nèi)容頁。其實(shí)大部分無需要這么多的標(biāo)簽，我們可以精簡一下。

2、精簡版代碼

//WordPress OG 協(xié)議 cnwper.com 精簡版
add_action('wp_head', 'starfire',0);
function starfire(){
global $wpdb;
$post_id = ( null === $post_id ) ? get_the_ID() : $post_id;
$copy = get_post_meta($post_id , 'author', true);
if (is_singular() && empty($copy)) {date_default_timezone_set('PRC');echo '
<meta property="og:type" content="article"/>
<meta property="og:site_name" content="';bloginfo('name'); echo '" />'; echo '
<meta property="article:published_time" content="'.get_the_date('c').'"/>
<meta property="og:url" content="';the_permalink(); echo '"/>'; echo '
<meta property="og:title" content="'.trim(wp_title('',0)).' - '; bloginfo('name'); echo '" />'; echo '
<meta property="og:description" content="'.get_the_excerpt().'" />
<meta property="og:image" content="'.get_mypost_thumbnail($post_id).'" />';
}
}
/**
* WordPress 獲取文章摘要整理版
*/
function get_mypost_excerpt($post_ID,$len){
if (!function_exists('utf8Substr')) {
function utf8Substr($str, $from, $len) {
return preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$from.'}'.
'((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s',
'$1',$str);
}
}
if(!$post_content){
$post = get_post($post_ID);
$post_content = $post->post_content;
}
if ($post->post_excerpt) {
$description = $post->post_excerpt;
} else {
if(preg_match('/<p>(.*)<\/p>/iU',trim(strip_tags($post->post_content,"<p>")),$result)){
$post_content = $result['1'];
} else {
$post_content_r = explode("\n",trim(strip_tags($post->post_content)));
$post_content = $post_content_r['0'];
}
$description = utf8Substr($post_content,0,$len);
return $description;
}
}
/**
* WordPress 獲取文章圖片加強(qiáng)版
*/
function get_mypost_thumbnail($post_ID){
if (has_post_thumbnail()) {
$timthumb_src = wp_get_attachment_image_src( get_post_thumbnail_id($post_ID), 'full' );
$url = $timthumb_src[0];
} else {
if(!$post_content){
$post = get_post($post_ID);
$post_content = $post->post_content;
}
preg_match_all('|<img.*?src=[\'"](.*?)[\'"].*?>|i', do_shortcode($post_content), $matches);
if( $matches && isset($matches[1]) && isset($matches[1][0]) ){
$url = $matches[1][0];
}else{
$url = '';
}
}
return $url;
}

這里，我只用到幾個(gè)常用的META標(biāo)簽頭部。