Changes the placeholder text for custom post types.

functions.php

<?php

if (!function_exists('get_input_text')):
function get_input_text($input) {
  global $post_type;

  if (is_admin() && $input == 'Enter title here') {
    switch ($post_type) {
      case 'my_post_type':
        return 'Enter full name here';
      case 'my_post_type_2':
        return 'Enter half name here';
    }
  }
  return $input;
}
add_filter('gettext', 'get_input_text');
endif;