如何在WordPress中替換元標題和元描述？

Question

對不起，如果我的問題是基本或愚蠢的，但請幫我解決這個問題。我試圖在wordpress中動態地更改<title>和<meta name="description" >標籤。所以這是我在function.php文件中試過的。

function changeMeta_2(){ 
    global $wpdb; 
    $cur_url = $_SERVER['REQUEST_URI']; 
    $basename = pathinfo($cur_url); 
    $ebasename = $basename['filename']; 
    if(is_numeric($ebasename)) { 
    $url = explode('/', $basename['dirname']); 
    $basename = explode('.', $url[count($url)-2]); 
    $ebasename = $basename[0]; 
    } 
    $pageName = $ebasename; 



    $arraylist_subcat = array("car","bike","boat","xxxx","yyyy","zzz","mmmm"); 
    $arraylist_maincat = array("aus","ind","usa","uae"); 


    $category_id = get_term_by('slug',$pageName, 'category'); 
    $category_parentid = get_term_by('id', $category_id->parent, 'category'); 
    $parent_slug = $category_parentid->slug; 



    if (is_page()) {   
     if (in_array($pageName,$arraylist_maincat)) {   
       $metaTitle = 'Browse '.$pageName.' | Some txt title | mysite.com'; 
       $metaDescription = 'some of custome blablaaaaa text description '.$pageName.' some of custome blablaaaaa text description ';        
       echo '<title>'.$metaTitle.'</title>'; 
       echo '<meta name="description" content="'.$metaDescription.'"/>';     
     } 
    } 
} 
add_action('wp_head', 'changeMeta_2'); 

在上面的代碼中，我試圖改變與數組值（in_array條件）匹配的術語id的標題標籤和元描述。

一切工作正常，但問題是代替覆蓋（替換）<title>標記追加頭。它沒有改變它追加。請有人幫我解決這個問題。

Answer 1

對於未來有人提出這個問題：這個功能可以使用Yoast SEO plugin來完成。

然而，如果你想還是自己做....

爲了修改標題，而不是wp_head鉤，你需要使用，實際上讓你的過濾器修改標題：wp_title

而且你可以/應該按順序使用wp_head到添加 meta描述（見這裏的文檔：http://codex.wordpress.org/Meta_Tags_in_WordPress）

還要注意有更容易的方法來獲取頁面的標題，下文提到的...

爲標題，您的代碼會看起來像這樣：

function changeTitle($title, $sep, $seplocation){ 
    global $wpdb; 

    // NOTE: This is the HARD way to get the page title, and is unreliable... 
    $cur_url = $_SERVER['REQUEST_URI']; 
    $basename = pathinfo($cur_url); 
    $ebasename = $basename['filename']; 

    if(is_numeric($ebasename)) { 
     $url = explode('/', $basename['dirname']); 
     $basename = explode('.', $url[count($url)-2]); 
     $ebasename = $basename[0]; 
    } 

    $pageName = $ebasename; 

    // NOTE: Why not get pagename this way? 
    global $post; 
    $pageName = $post->post_title; 

    // or if you need the slug... 
    $pageName = $post->post_slug; 

    $arraylist_subcat = array("car","bike","boat","xxxx","yyyy","zzz","mmmm"); 
    $arraylist_maincat = array("aus","ind","usa","uae"); 


    $category_id = get_term_by('slug',$pageName, 'category'); 
    $category_parentid = get_term_by('id', $category_id->parent, 'category'); 
    $parent_slug = $category_parentid->slug; 



    if (is_page()) {   
     if (in_array($pageName,$arraylist_maincat)) {   
       $title = 'Browse '.$pageName.' | Some txt title | mysite.com';     
     } 
    } 

    return $title; 
} 

add_action('wp_title', 'changeTitle', 10, 3);