Is there any ways to count posts in categories?

Question

I have nearly 500 categories in my web site. I want to add a function to count posts in each category. Since the categories are too many, i can't try to add posts id or name to each category code. I need wordpress to do it automatically for each category. Is there any way you can show me to do that?

{

                    <a href="<?php echo $collection_link; ?>">
                        <h5 class="text-center card-title">
                            <?php the_category(); ?>
                        </h5>
                    </a>
                    <a href="<?php echo $collection_link; ?>">
                        <p class="text-center d-flex justify-content-center card-text">
                            <?php //this is where post count should be displayed ?>
                        </p>
                    </a>

                </div><!-- end card-body -->}

Answer 1

function count_cat_post($category) {
if(is_string($category)) {
    $catID = get_cat_ID($category);
}
elseif(is_numeric($category)) {
    $catID = $category;
} else {
    return 0;
}
$cat = get_category($catID);
return $cat->count;
}

// Usage
echo  count_cat_post('1');
echo  count_cat_post('General');

Taken from here. A simple google search would have gave your answer!

If you're using the the_category() function, you will need to filter a post count in to that function. This answer on a post over at WordPress Stack Exchange explains how to do that. Please note that the_category() function is actually just echo get_the_categories(); so the filter in the linked answer should work for you.

For completeness, here's the code from the answer linked above.

add_filter('get_the_categories', 'wpse50876_the_counter');

function wpse50876_the_counter($cats){
    foreach($cats as $cat){
        $cat->cat_name = $cat->cat_name.'('.$cat->count.')';
    }
    return $cats;
}

Answer 2

inside category.php that would be

$category = get_queried_object();
$count = $category->category_count;