WordPress的文章自动添加关键词及关键词的SEO优化

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";
}
}

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 (
"rn","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 ( $description,220,'utf-8' ) . '..';
echo "<meta name="description" content="$description" />n";
}

'.$sr.'',$text); } return $text; } add_filter('the_excerpt','wps_highlight_results'); add_filter('the_title','wps_highlight_results');