Get the Number of All Posts in WordPress

Use the wp_count_posts() function to get the posts count.
The code:

<?php
  $count_posts = wp_count_posts();
  $count_pages = wp_count_posts('page');
  echo "<li><a href=" . get_option('home') . ">";
  echo $count_posts->publish . " Posts, " . $count_pages->publish . " Pages";
  echo "</a></li>"
?>