WordPress默認的搜索功能不只搜索文章標題，而且還會搜索文章內(nèi)容，這樣當(dāng)讀者搜索網(wǎng)站時會把一些文章內(nèi)容也包含關(guān)鍵字的文章也搜索出來，這樣有時讀者看到搜索出來這樣的文章會感覺很迷惑。所以我們可以把文章內(nèi)容搜索禁止掉，只搜索文章標題來使得搜索結(jié)果保持關(guān)聯(lián)性更高。將下面的代碼添加到主題的 functions.php 文件即可：

//SearchOnlyPostTitle
function wpyou_search_by_title_only( $search, &$wp_query )
{
global $wpdb;

if ( empty( $search ) )
return $search; // skip processing – no search term in query

$q = $wp_query->query_vars;
$n = ! empty( $q[‘exact’] ) ? ” : ‘%’;

$search =
$searchand = ”;

foreach ( (array) $q[‘search_terms’] as $term ) {
$term = esc_sql( like_escape( $term ) );
$search .= “{$searchand}($wpdb->posts.post_title LIKE ‘{$n}{$term}{$n}’)”;
$searchand = ‘ AND ‘;
}

if ( ! empty( $search ) ) {
$search = ” AND ({$search}) “;
if ( ! is_user_logged_in() )
$search .= ” AND ($wpdb->posts.post_password = ”) “;
}

return $search;
}
add_filter( ‘posts_search’, ‘wpyou_search_by_title_only’, 500, 2 );