Question

所以我试着在我的wordpress网站上的导航菜单上工作。我试图从hongkiat.com复制导航菜单（如图所示）。

在Hongkiat的导航菜单中，您将看到五个（5）父类别（设计/开发，技术，灵感，SOcial COmmerce和交易）。一旦用户在父类别上徘徊，它将显示父类别下的最近帖子。

无论如何，我设法编写了下拉菜单，其中显示了父类别以及它的子类别。现在的困境在于如何在用户悬停的父类别下显示最新的帖子（至少3个帖子）。

无论如何，这是我的代码：

HTML / PHP

<ul>
    <?php 

        global $post;
        $myposts = get_posts('numberposts=3&offset=1');
        foreach($myposts as $post) ;


        $args = array(
        'show_option_all'    => '',
        'hide_empty'         => '0',
        'orderby'            => 'name',
        'order'              => 'ASC',
        'style'              => 'list',
        'use_desc_for_title' => 1,
        'child_of'           => 0,
        'hierarchical'       => 1,
        'title_li'           => (''),
        'show_option_none'   => __( '' ),
        'number'             => null,
        'echo'               => 1,
        'depth'              => 2,
        'current_category'   => 0,
        'pad_counts'         => 0,
        'taxonomy'           => 'category',
        'walker'             => null
        );
        wp_list_categories( $args ); 
    ?>
</ul>

CSS

.navone {
    display:inline-block;
    height:35px;
    vertical-align:middle;
    margin:0px auto;
    font-family: "Raleway",san-serif;
    font-feature-settings: normal;
    font-kerning: auto;
    font-language-override: normal;
    font-size: 12px;
    font-size-adjust: none;
    font-stretch: normal;
    font-style: normal;
    font-synthesis: weight style;
    font-variant: normal;
    font-weight: 600 !important;
    letter-spacing: 0.03em;
    text-transform:uppercase;
}

.navone ul {
    margin:0;
    padding:0;
}

.navone ul ul {
    display: none;

}

.navone ul li:hover > ul {
    display: block;
    -webkit-transition: all .25s ease;
    -moz-transition: all .25s ease;
    -ms-transition: all .25s ease;
    -o-transition: all .25s ease;
    transition: all .25s ease;
}

.navone ul {
    list-style: none;
    position: relative;
    display: inline-table;
}

.navone ul:after {
    content: ""; clear: both; display: block;
}

.navone ul li {
    float: left;
    cursor:pointer;
    padding:10px 20px;
}

.navone ul li:hover {
    background:#000;
}

.navone ul li:hover a {
    color: #fff;
}

.navone ul li a {
    display: block;
    color: #FFF;
    text-decoration: none;
}

.navone ul li ul {
    width:200px;
    z-index:9;
}

.navone ul ul {
    background: #000;
    padding: 0;
    position: absolute;
    top:100%;
    left:0;
}

.navone ul ul li {
    float: none; 
    position: relative;
    padding:5px 10px;
}

.navone ul ul li a {
    color: #fff;
}

.navone ul ul li a:hover {
    -webkit-transition: all .25s ease;
    -moz-transition: all .25s ease;
    -ms-transition: all .25s ease;
    -o-transition: all .25s ease;
    transition: all .25s ease;
}

.navone ul ul ul {
    position: absolute; left: 100%; top:0;
}

.navone ul li ul li {
    padding:8px 10px;
    -webkit-transition: all .25s ease;
    -moz-transition: all .25s ease;
    -ms-transition: all .25s ease;
    -o-transition: all .25s ease;
    transition: all .25s ease;
}
.navone ul li ul li:hover {
    border-left:5px solid #F52100;
    padding-left:20px;
    -webkit-transition: all .25s ease;
    -moz-transition: all .25s ease;
    -ms-transition: all .25s ease;
    -o-transition: all .25s ease;
    transition: all .25s ease;
}

.navtwo {
    display:inline;
}

如果有人可以帮助我或指出我错过了什么，因为我的代码不起作用。我的代码没有错误，但我没有实现我想要完成的任务。

任何人都可以伸出援助之手。

Answer 1

<ul>
<?php $args = array(
        'type'                     => 'post',
        'child_of'                 => 0,
        'parent'                   => '',
        'orderby'                  => 'name',
        'order'                    => 'ASC',
        'hide_empty'               => 1,
        'hierarchical'             => 1,
        'exclude'                  => '',
        'include'                  => '',
        'number'                   => '',
        'taxonomy'                 => 'category',
        'pad_counts'               => false

);

$categories = get_categories( $args );

foreach($categories as $cat)
{ 
    if ($cat->category_parent == 0) {

?>
    <li>
        <?php echo $cat->name; $cat_id = $cat->term_id;?>
        <?php $post_args = array(
            'post_type'=>'post',
            'posts_per_page' => 3,
            'cat' => $cat_id
        );
        $the_query = new WP_Query($post_args);
        if($the_query->have_posts()): ?>
        <ul>
            <?php while($the_query->have_posts()): $the_query->the_post(); ?>
                    <li>
                        <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
                    </li>
            <?php endwhile; ?>
        </ul>
        <?php endif; wp_reset_query(); ?>
    </li>
<?php } }?>
</ul>

Answer 2

你可以试试这个：

<ul>
<?php $args = array(
        'type'                     => 'post',
        'child_of'                 => 0,
        'parent'                   => '',
        'orderby'                  => 'name',
        'order'                    => 'ASC',
        'hide_empty'               => 1,
        'hierarchical'             => 1,
        'exclude'                  => '',
        'include'                  => '',
        'number'                   => '',
        'taxonomy'                 => 'category',
        'pad_counts'               => false

);

$categories = get_categories( $args );

foreach($categories as $cat): ?>
    <li>
        <?php echo $cat->$name; $cat_id = $cat->$term_id;?>
        <?php $post_args = array(
            'post_type'=>'post',
            'posts_per_page' => 3,
            'cat' => $cat_id
        );
        $the_query = new WP_Query($post_args);
        if($the_query->have_posts()): ?>
        <ul>
            <?php while($the_query->have_posts()): $the_query->the_post(); ?>
                    <li>
                        <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
                    </li>
            <?php endwhile; ?>
        </ul>
        <?php endif; wp_reset_query(); ?>
    </li>
<?php endforeach; ?>
</ul>

它没有经过测试，但应该可以使用。

Answer 3

您在上面的代码中遗漏了一些东西。

让我们试着让它变得简单。

第1步：在名为$total_categories的数组中获取其下的所有父类别和子类别

您可以看到以下代码，以获取所有父类别和子类别的数组

<?php 
$parent_args = array(
        'type'                     => 'post',
        'parent'                   => '0',
        'orderby'                  => 'name',
        'order'                    => 'ASC',
        'hide_empty'               => 0,
        'hierarchical'             => 1,
        'taxonomy'                 => 'category',
        'pad_counts'               => false
);
$parent_categories = get_categories( $parent_args );

foreach ($parent_categories as $parent_category) {
    $child_args = array(
        'type'                     => 'post',
        'parent'                   => $parent_category->term_id,
        'orderby'                  => 'name',
        'order'                    => 'ASC',
        'hide_empty'               => 0,
        'hierarchical'             => 1,
        'taxonomy'                 => 'category',
        'pad_counts'               => false
    );  
    $cats_arr = array(); 
    $child_categories = get_categories( $child_args ); 
    $cats_arr[] = $parent_category->term_id;
    foreach ($child_categories as $child_category) {
        $cats_arr[] = $child_category->term_id;
    }

    $total_categories[$parent_category->term_id] = $cats_arr;
}
?>

提供的输出是我的案例

上面的数组看起来像 18 是父类别ID，子类别 19和20 加上我们还包括父类别ID （ 18）在数组中以及数组的索引。

Array
(
    [18] => Array
        (
            [0] => 18
            [1] => 19
            [2] => 20
        )

    [15] => Array
        (
            [0] => 15
            [1] => 16
            [2] => 17
        )

    [1] => Array
        (
            [0] => 1
        )

)

现在只需遍历数组$total_categories即可获得该类别下的所有父类别和前3个帖子

<ul>
<?php foreach($total_categories as $total_category_k=>$total_category_v): ?>
        <li>

            <a href=""><?php echo get_the_category_by_ID($total_category_k);?></a>
        <?php $post_args = array(
            'post_type'=>'post',
            'posts_per_page' => 3,
            'orderby'=>'ID',
            'order'=>'DESC',
            'tax_query' => array(
                                array(
                                    'taxonomy' => 'category',
                                    'field'    => 'term_id',
                                    'terms'    => $total_category_v,
                                    'operator' => 'IN'
                                ),
                            ),
            );

        $the_query = new WP_Query($post_args);
        if($the_query->have_posts()): ?>
        <ul>
            <?php while($the_query->have_posts()): $the_query->the_post(); ?>
                    <li>
                        <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
                    </li>
            <?php endwhile; ?>
        </ul>
        <?php endif; wp_reset_query(); ?>
    </li>
<?php endforeach; ?>
</ul>

提供的输出是我的案例

最终它将为您提供所需的HTML，其中包含所需的内容输出，如下所示：

<ul>
        <li>

            <a href="">menu</a>
            </li>
        <li>

            <a href="">test</a>
            </li>
        <li>

            <a href="">Uncategorized</a>
                <ul>
                                <li>
                        <a href="http://localhost/wp/clark_atlanta_university/students-unlock-the-mysteries-of-the-brain-with-nih-scientists/">Students unlock the mysteries of the brain with NIH scientists</a>
                    </li>
                                <li>
                        <a href="http://localhost/wp/clark_atlanta_university/contacts-better-than-permanent-lenses-for-babies-after-cataract-surgery/">Contacts better than permanent lenses for babies after cataract surgery</a>
                    </li>
                                <li>
                        <a href="http://localhost/wp/clark_atlanta_university/nih-announces-recruitment-for-clinical-trial-to-test-new-tinnitus-treatment-device/">NIH announces recruitment for clinical trial to test new tinnitus treatment device</a>
                    </li>
                    </ul>
            </li>
</ul>

您缺少的代码是：

'orderby'=>'ID',
'order'=>'DESC',

要获得前3个帖子，您必须以降序获得帖子按ID排序，当然posts_per_page只能为您提供3条记录

'tax_query' => array(
                                    array(
                                        'taxonomy' => 'category',
                                        'field'    => 'term_id',
                                        'terms'    => $total_category_v,
                                        'operator' => 'IN'
                                    ),
                                ),
                );

获取与类别相关的帖子（无论是父母还是孩子）所以我们传递了包含父节点和子节点的数组类

下拉导航菜单，显示每个类别的最新帖子

3 个答案: