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wordpress-stuff.php

get_category($category_id)->count //items in category


//just posts in category
$query = new WP_Query( array('posts_per_page' => -1, 'category__in' => $category) );
$count = $query->post_count;
echo 'count: ' . $count;


INSIDE LOOP
the_permalink();    get_the_permalink();
the_title();        get_the_title();
the_date();         get_the_date();
the_content();      get_the_content();


THE LOOP:
<?php
  global $post;
  $args = array( 'posts_per_page' => -1, 'posts_per_page' => 5, 'category__in' => $category_id);
  $myposts = get_posts( $args );
  foreach ( $myposts as $post ) : 
    setup_postdata( $post );
?>

<?php the_title(); ?>

<?php endforeach;
  wp_reset_postdata(); 
?>