Jumlah Post dari Sebuah Category atau Tags

<?php
$taxonomy = "category"; // can be category, post_tag, or custom taxonomy name

// Use any one of the three methods below

// Using Term ID
$term_id = 1;
$term = get_term_by('id', $term_id, $taxonomy);

// Using Term Name
$term_name = 'A Category';
$term = get_term_by('name', $term_name, $taxonomy);

// Using Term Slug
$term_slug = 'a-category';
$term = get_term_by('slug', $term_slug, $taxonomy);

// Fetch the count
echo $term->count;
?>


MODIFIKASI:
Jumlah post dari sebuah tags, dimana tags otomatis dari sebuah tanggal.

<?php
$taxonomy = "post_tag"; // can be category, post_tag, or custom taxonomy name
// Using Term Name
$term_name = get_the_date('Ymd');
$term = get_term_by('name', $term_name, $taxonomy);
// Fetch the count
echo $term->count;
?>