讓WordPress分類/標簽等存檔頁也能置頂文章

WordPress有原生的文章置頂功能，不過隻支援在首頁讓置頂文章在頂部顯示，其他如分類頁、標簽頁、作者頁和日期頁等存檔頁面，就沒法讓置頂文章在頂部顯示瞭，隻能按默認的順序顯示。如何才能實現存檔頁面置頂文章呢？今天分享來自 @露兜部落格 的方法。

將下面的代碼添加到主題的 functions.php 文件即可：

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add_filter('the_posts',  'putStickyOnTop' );
function putStickyOnTop( $posts ) {
  if(is_home() || !is_main_query() || !is_archive())
    return $posts;
 
  global $wp_query;
 
  $sticky_posts = get_option('sticky_posts');
 
  if ( $wp_query->query_vars['paged'] <= 1 && is_array($sticky_posts) && !empty($sticky_posts) && !get_query_var('ignore_sticky_posts') ) {        $stickies1 = get_posts( array( 'post__in' => $sticky_posts ) );
    foreach ( $stickies1 as $sticky_post1 ) {
      // 判斷當前是否分類頁 
      if($wp_query->is_category == 1 && !has_category($wp_query->query_vars['cat'], $sticky_post1->ID)) {
        // 去除不屬於本分類的文章
        $offset1 = array_search($sticky_post1->ID, $sticky_posts);
        unset( $sticky_posts[$offset1] );
      }
      if($wp_query->is_tag == 1 && has_tag($wp_query->query_vars['tag'], $sticky_post1->ID)) {
        // 去除不屬於本標簽的文章
        $offset1 = array_search($sticky_post1->ID, $sticky_posts);
        unset( $sticky_posts[$offset1] );
      }
      if($wp_query->is_year == 1 && date_i18n('Y', strtotime($sticky_post1->post_date))!=$wp_query->query['m']) {
        // 去除不屬於本年份的文章
        $offset1 = array_search($sticky_post1->ID, $sticky_posts);
        unset( $sticky_posts[$offset1] );
      }
      if($wp_query->is_month == 1 && date_i18n('Ym', strtotime($sticky_post1->post_date))!=$wp_query->query['m']) {
        // 去除不屬於本月份的文章
        $offset1 = array_search($sticky_post1->ID, $sticky_posts);
        unset( $sticky_posts[$offset1] );
      }
      if($wp_query->is_day == 1 && date_i18n('Ymd', strtotime($sticky_post1->post_date))!=$wp_query->query['m']) {
        // 去除不屬於本日期的文章
        $offset1 = array_search($sticky_post1->ID, $sticky_posts);
        unset( $sticky_posts[$offset1] );
      }
      if($wp_query->is_author == 1 && $sticky_post1->post_author != $wp_query->query_vars['author']) {
        // 去除不屬於本作者的文章
        $offset1 = array_search($sticky_post1->ID, $sticky_posts);
        unset( $sticky_posts[$offset1] );
      }
    }
 
    $num_posts = count($posts);
    $sticky_offset = 0;
    // Loop over posts and relocate stickies to the front.
    for ( $i = 0; $i < $num_posts; $i++ ) {
      if ( in_array($posts[$i]->ID, $sticky_posts) ) {
        $sticky_post = $posts[$i];
        // Remove sticky from current position
        array_splice($posts, $i, 1);
        // Move to front, after other stickies
        array_splice($posts, $sticky_offset, 0, array($sticky_post));
        // Increment the sticky offset. The next sticky will be placed at this offset.
        $sticky_offset++;
        // Remove post from sticky posts array
        $offset = array_search($sticky_post->ID, $sticky_posts);
        unset( $sticky_posts[$offset] );
      }
    }
 
    // If any posts have been excluded specifically, Ignore those that are sticky.
    if ( !empty($sticky_posts) && !empty($wp_query->query_vars['post__not_in'] ) )
      $sticky_posts = array_diff($sticky_posts, $wp_query->query_vars['post__not_in']);
 
    // Fetch sticky posts that weren't in the query results
    if ( !empty($sticky_posts) ) {
      $stickies = get_posts( array(
        'post__in' => $sticky_posts,
        'post_type' => $wp_query->query_vars['post_type'],
        'post_status' => 'publish',
        'nopaging' => true
      ) );
 
      foreach ( $stickies as $sticky_post ) {
        array_splice( $posts, $sticky_offset, 0, array( $sticky_post ) );
        $sticky_offset++;
      }
    }
  }
 
  return $posts;
}

add_filter(‘the_posts’, ‘putStickyOnTop’ );
function putStickyOnTop( $posts ) {
if(is_home() || !is_main_query() || !is_archive())
return $posts;
global $wp_query; $sticky_posts = get_option(‘sticky_posts’);
if ( $wp_query->query_vars[‘paged’] <= 1 && is_array($sticky_posts) && !empty($sticky_posts) && !get_query_var(‘ignore_sticky_posts’) ) { $stickies1 = get_posts( array( ‘post__in’ => $sticky_posts ) );
foreach ( $stickies1 as $sticky_post1 ) {
// 判斷當前是否分類頁
if($wp_query->is_category == 1 && !has_category($wp_query->query_vars[‘cat’], $sticky_post1->ID)) {
// 去除不屬於本分類的文章
$offset1 = array_search($sticky_post1->ID, $sticky_posts);
unset( $sticky_posts[$offset1] );
}
if($wp_query->is_tag == 1 && has_tag($wp_query->query_vars[‘tag’], $sticky_post1->ID)) {
// 去除不屬於本標簽的文章
$offset1 = array_search($sticky_post1->ID, $sticky_posts);
unset( $sticky_posts[$offset1] );
}
if($wp_query->is_year == 1 && date_i18n(‘Y’, strtotime($sticky_post1->post_date))!=$wp_query->query[‘m’]) {
// 去除不屬於本年份的文章
$offset1 = array_search($sticky_post1->ID, $sticky_posts);
unset( $sticky_posts[$offset1] );
}
if($wp_query->is_month == 1 && date_i18n(‘Ym’, strtotime($sticky_post1->post_date))!=$wp_query->query[‘m’]) {
// 去除不屬於本月份的文章
$offset1 = array_search($sticky_post1->ID, $sticky_posts);
unset( $sticky_posts[$offset1] );
}
if($wp_query->is_day == 1 && date_i18n(‘Ymd’, strtotime($sticky_post1->post_date))!=$wp_query->query[‘m’]) {
// 去除不屬於本日期的文章
$offset1 = array_search($sticky_post1->ID, $sticky_posts);
unset( $sticky_posts[$offset1] );
}
if($wp_query->is_author == 1 && $sticky_post1->post_author != $wp_query->query_vars[‘author’]) {
// 去除不屬於本作者的文章
$offset1 = array_search($sticky_post1->ID, $sticky_posts);
unset( $sticky_posts[$offset1] );
}
}
$num_posts = count($posts);
$sticky_offset = 0;
// Loop over posts and relocate stickies to the front.
for ( $i = 0; $i < $num_posts; $i++ ) {
if ( in_array($posts[$i]->ID, $sticky_posts) ) {
$sticky_post = $posts[$i];
// Remove sticky from current position
array_splice($posts, $i, 1);
// Move to front, after other stickies
array_splice($posts, $sticky_offset, 0, array($sticky_post));
// Increment the sticky offset. The next sticky will be placed at this offset.
$sticky_offset++;
// Remove post from sticky posts array
$offset = array_search($sticky_post->ID, $sticky_posts);
unset( $sticky_posts[$offset] );
}
} // If any posts have been excluded specifically, Ignore those that are sticky.
if ( !empty($sticky_posts) && !empty($wp_query->query_vars[‘post__not_in’] ) )
$sticky_posts = array_diff($sticky_posts, $wp_query->query_vars[‘post__not_in’]); // Fetch sticky posts that weren’t in the query results
if ( !empty($sticky_posts) ) {
$stickies = get_posts( array(
‘post__in’ => $sticky_posts,
‘post_type’ => $wp_query->query_vars[‘post_type’],
‘post_status’ => ‘publish’,
‘nopaging’ => true
) ); foreach ( $stickies as $sticky_post ) {
array_splice( $posts, $sticky_offset, 0, array( $sticky_post ) );
$sticky_offset++;
}
}
}
return $posts;
}

代碼說明

1、如果你想讓存檔頁也都顯示全部置頂文章，那麼就刪掉11-43行的代碼；

2、如果不想在某分類頁顯示置頂文章，將第 3 行的

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if(

if(

改成：

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// abc是分類名稱
 
if ( is_category( 'abc' ) ||

// abc是分類名稱 if ( is_category( ‘abc’ ) ||

3、如果不想某標簽頁顯示置頂文章，將第 3 行的

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if(

if(

改成：

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// abc是標簽名稱
 
if ( is_tag( 'abc' ) ||

// abc是標簽名稱 if ( is_tag( ‘abc’ ) ||

4、如果不想某作者頁顯示置頂文章，將第 3 行的

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if(

if(

改成：

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// abc是作者昵稱
 
if ( is_author( 'abc' ) ||

// abc是作者昵稱 if ( is_author( ‘abc’ ) ||

5、以上代碼隻對主循環有效，如果你在存檔頁使用WP_Query或query_posts來獲取文章列表，又像讓這些列表頂部顯示置頂文章，可以把第3行代碼中的以下代碼刪掉(註意：可能會導致文章顯示數量跟你設置的不一樣)：

1

|| !is_main_query()

|| !is_main_query()

置頂樣式

如果你想給置頂文章添加樣式，將以下代碼添加到functions.php中，會給置頂文章添加一個名為 sticky 的class。具體的css代碼，再自行自定義：

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add_filter('post_class',  'addStickyClass' ,10,3 );
function addStickyClass( $classes, $class, $post_id ){
  if( is_sticky() && is_category() && !isset( $classes['sticky'] ) ){
    $classes[] = 'sticky';
  }
 
  return $classes;
}

add_filter(‘post_class’, ‘addStickyClass’ ,10,3 );
function addStickyClass( $classes, $class, $post_id ){
if( is_sticky() && is_category() && !isset( $classes[‘sticky’] ) ){
$classes[] = ‘sticky’;
}
return $classes;
}

參考資料：http://www.ludou.org/wordpress-sticky-posts-in-archive.html

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