WordPress：get_the_category并回显到最儿童/最深类别的链接 [英] Wordpress: get_the_category and echo out link to child-most/deepest category

问题描述

我有此代码，位于search.php页面上，它检索每个帖子的所有类别，并在第一个类别的回显中提供链接：

I have this code which is located on the search.php page and retrieves all the categories for each post and echo's out a link to the first category:

    $category = get_the_category(); //print_r($category);
if ($category) {
  echo '<a href="' . get_category_link( $category[0]->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category[0]->name ) . '" ' . '>' . $category[0]->name.'</a> ';

我需要做的是使用类似的代码，但要获得子级最大/最深的类别数组？

What I need to do is use a similar code but that gets the child-most/deepest category in the array?

这是打印出来的数组：

[0] => stdClass Object
    (
        [term_id] => 170
        [name] => ACS Series Suspended & Crane Scales - EC Approved
        [slug] => uwe-acs-series-suspended-crane-scales
        [term_group] => 0
        [term_taxonomy_id] => 170
        [taxonomy] => category
        [description] => 
        [parent] => 3
        [count] => 4
        [object_id] => 1578
        [cat_ID] => 170
        [category_count] => 4
        [category_description] => 
        [cat_name] => ACS Series Suspended & Crane Scales - EC Approved
        [category_nicename] => uwe-acs-series-suspended-crane-scales
        [category_parent] => 3
    )

[1] => stdClass Object
    (
        [term_id] => 3
        [name] => Crane Scales
        [slug] => crane-scales
        [term_group] => 0
        [term_taxonomy_id] => 3
        [taxonomy] => category
        [description] => 
        [parent] => 0
        [count] => 53
        [object_id] => 1578
        [cat_ID] => 3
        [category_count] => 53
        [category_description] => 
        [cat_name] => Crane Scales
        [category_nicename] => crane-scales
        [category_parent] => 0
    )

您可以看到，一个类别的父级-> 3，另一个类别的父级-> 0。如何使用上面的查询仅打印出parent-> 3类别的链接？

As you can see, one category has parent->3 and the other has parent->0. How do I use the above query to print out the link only for a category with parent->3?

它可能很简单，但是有点让人头疼。任何帮助将不胜感激！

Its probably quite simple but its a bit over my head. Any help would be greatly appreciated!

谢谢

戴夫

推荐答案

在您的theme / functions.php文件中添加此功能：

Add this function in you're theme/functions.php file :

function get_deep_child_category( $categories )
{
    $maxId = 0;
    $maxKey = 0;
    foreach ( $categories as $key => $value )
    {
        if ( $value->parent > $maxId )
        {
            $maxId = $value->term_id;
            $maxKey = $key;
        }
    }
    return $categories[$maxKey];
}

然后，假设您在theme / search.php中成为示例

Then let's say as in you're example in theme/search.php you do

$categories = get_the_category();
if ( $categories ) :
    $deepChild = get_deep_child_category( $categories );
    ?>
        <a href="<?php echo get_category_link( $deepChild->term_id ); ?>" title="<?php echo sprintf( __( "View all posts in %s" ), $deepChild->name ); ?>"><?php echo $deepChild->name; ?></a>
    <?php 
endif;

根据我的知识，没有其他方法可以通过get_the_category（）对类别进行排序，但是我可能会误认为如果这样的话，上面的代码将不是最好的方法。

From my knoledge there is no other way of sorting categories thru get_the_category() but i might be mistaken and the code above wouldn't be the best way of doing things if so .

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