如何按ID显示标签中的帖子数？

Question

Trying

<?php
$number = 'apartamenty';

$terms = get_terms('post_tag', "number=$number");
if($terms){
foreach ($terms as $t){
    echo $t->name.' : '.$t->count;
}
}?>

But this code show two tags...

Answer 1

To get the number of posts that are attached to a specific post tag, such as apartamenty , you would use get_term_by() . This WordPress Core construct lets you grab the WP_Term object for the specific post tag. In your case, you are wanting the post tag of apartamenty .

Okay, you'd have a function (ie to make it reusable) that runs this code and you'd pass in the actual post tag that you want to explore. This function is using the post tag slug.

function render_post_tag_post_count( $post_tag ) {
    $term = get_term_by( 'slug', $post_tag, 'post_tag' );
    if ( ! $term ) {
        return;
    }

    // You get back an WP_Term object
    // You can then use $term->count, which gives you the
    // number of posts attached to this post tag.

    echo (int) $term->count;
}

The property $term->count gives you the number of posts that are attached to that term.

You use it like this:

render_post_tag_post_count( 'apartamenty' );

What if I want to get it by post tag ID?

Take the above code and change the first argument from slug to id . Then you would pass the post tag's ID instead of its slug.

You can learn more about the parameters in WordPress Codex .