wordpress关键字及网页描述关系网站对搜索引擎的友好程度，如果自己手动加显然太折腾了，那如何让WordPress博客自动为每篇文章自动关键字及网页描述。每篇文章的内容不同，我们该如何让wordpress自动添加文章描述和关键词呢？下面就让我们来看看如何给wordpress自动添加文章描述和关键词。
重构：首页,分类页,文章页,单页,搜索页面,标签页,专题,快讯页,作者页,404等
add_action ( ‘wp_head’, ‘wp_keywords’ ,1 ); // 添加关键字
add_action ( ‘wp_head’, ‘wp_description’ ,1 ); // 添加页面描述
/**
+———————————————————-
* 站点关键字
+———————————————————-
* @return string
+———————————————————-
*/
function wp_keywords() {
global $s, $post;
$keywords = ”;
if (is_single ()) { //如果是文章页，关键词则是：标签+分类ID
if (get_the_tags ( $post->ID )) {
foreach ( get_the_tags ( $post->ID ) as $tag )
$keywords .= $tag->name . ‘, ‘;
}
foreach ( get_the_category ( $post->ID ) as $category )
$keywords .= $category->cat_name . ‘, ‘;
$keywords = substr_replace ( $keywords, ”, – 2 );
} elseif (is_home ()) {
$keywords = ‘我是主页关键词’; //主页关键词设置
} elseif (is_tag ()) { //标签页关键词设置
$keywords = single_tag_title ( ”, false );
} elseif (is_category ()) {//分类页关键词设置
$keywords = single_cat_title ( ”, false );
} elseif (is_search ()) {//搜索页关键词设置
$keywords = esc_HTML ( $s, 1 );
} else {//默认页关键词设置
$keywords = trim ( wp_title ( ”, false ) );
}
if ($keywords) { //输出关键词
echo “<meta name=\”keywords\” content=\”$keywords\” />\n”;
}
}
/**
+———————————————————-
* 站点描述
+———————————————————-
* @return string
+———————————————————-
*/
function wp_description() {
global $s, $post;
$description = ”;
$blog_name = get_bloginfo ( ‘name’ );
if (is_singular ()) { //文章页如果存在描述字段，则显示描述，否则截取文章内容
if (! empty ( $post->post_excerpt )) {
$text = $post->post_excerpt;
} else {
$text = $post->post_content;
}
$description = trim ( str_replace ( array (
“\r\n”,
“\r”,
“\n”,
“ ”,
” ”
), ” “, str_replace ( “\””, “‘”, strip_tags ( $text ) ) ) );
if (! ($description))
$description = $blog_name . “-” . trim ( wp_title ( ”, false ) );
} elseif (is_home ()) {//首页显示描述设置
$description = $blog_name . “-” . get_bloginfo ( ‘description’ ) .’首页要显示的描述’; // 首頁要自己加
} elseif (is_tag ()) {//标签页显示描述设置
$description = $blog_name . “有关 ‘” . single_tag_title ( ”, false ) . “‘ 的文章”;
} elseif (is_category ()) {//分类页显示描述设置
$description = $blog_name . “有关 ‘” . single_cat_title ( ”, false ) . “‘ 的文章”;
} elseif (is_archive ()) {//文档页显示描述设置
$description = $blog_name . “在: ‘” . trim ( wp_title ( ”, false ) ) . “‘ 的文章”;
} elseif (is_search ()) {//搜索页显示描述设置
$description = $blog_name . “: ‘” . esc_html ( $s, 1 ) . “‘ 的搜索結果”;
} else {//默认其他页显示描述设置
$description = $blog_name . “有关 ‘” . trim ( wp_title ( ”, false ) ) . “‘ 的文章”;
}
//输出描述
$description = mb_substr ( $description, 0, 220, ‘utf-8’ ) . ‘..’;
echo “<meta name=\”description\” content=\”$description\” />\n”;
}
第二种：
//Title标题
function bzg_filter_title( $title ) {
$title[‘site’] = ”;
$title[‘tagline’] = ”;
$title[‘page’] = ”;
return $title;
}
add_filter( ‘document_title_parts’, ‘bzg_filter_title’, 10, 1 );
function bzg_seo_title() {
global $cat, $tag_id, $page, $paged;
$page_num = ”;
if ( $paged >= 2 || $page >= 2 )
$page_num = ‘_’ . sprintf( ‘第%s页’, max( $paged, $page ) );
$title = wp_get_document_title();
if( is_author() )
$title = ‘作者：’ . $title;
if( is_category() && get_term_meta( $cat , ‘seo_title’, true ) )
$title = get_term_meta( $cat , ‘seo_title’, true );
if( is_tag() && get_term_meta( $tag_id , ‘seo_title’, true ) )
$title = get_term_meta( $tag_id , ‘seo_title’, true );
if ( ! is_home() ) {
$title .= $page_num . ‘ – ‘;
$title .= get_option(‘blogname’);
} else {
$description = get_option( ‘blogdescription’ );
$home_title = get_option( ‘home_title’ );
if ( $home_title ) {
$title = $home_title;
} elseif($description) {
$title .= ‘ – ‘ . $description;
}
$title .= $page_num;
}
return $title;
}
function bzg_seo_keywords() {
global $post;
$keywords = ”;
if ( is_home() )
$keywords = get_option( ‘home_keywords’ );
if ( ( is_category() || is_tag() ))
$keywords = single_cat_title(”, false);
if ( is_single() || is_page() ) {
if ( $post->post_excerpt ) {
$keywords = $post->post_excerpt;
} else {
$keywords = $post->post_title;
}
}
return $keywords;
}
//Description标签
function bzg_seo_description() {
global $post;
$description = ”;
if ( is_home() )
$description = get_option( ‘home_description’ );
if ( ( is_category() || is_tag() ) && category_description() )
$description = wp_strip_all_tags( category_description(), true );
if ( is_single() || is_page() ) {
if ( $post->post_excerpt ) {
$description = $post->post_excerpt;
} else {
$description = mb_strimwidth(esc_html(wp_strip_all_tags($post->post_content, true)), 0, 200);
}
}
return $description;
}
header.php 调用：
<head>
<title><?php echo bzg_seo_title(); ?></title>
<?php
$bzg_keywords = bzg_seo_keywords();
if (!empty($bzg_keywords)) {
echo ‘<meta name=”keywords” content=”‘ . $bzg_keywords . ‘” />’;
echo “\n”;
}
$bzg_description = bzg_seo_description();
if (!empty($bzg_description)) {
echo ‘<meta name=”description” content=”‘ . $bzg_description . ‘” />’;
echo “\n”;
}
?>
<?php if (is_home()) : ?>
<?php endif; ?>
</head>