Counting Posts by Category

0
down vote
accepted

I think it would help you to read this => http://wordpress.org/support/topic//display-number-of-posts-per-category

function number_postpercat($idcat) {
    global $wpdb;
    $query = "SELECT count FROM $wpdb->term_taxonomy WHERE term_id = $idcat";
    $num = $wpdb->get_col($query);
    echo $num[0];

}