The CMS system Example Created in php and mysql web Development (Third Edition) About mysql Error?

  question

The database has been established for the problems arising from the implementation of the index.php document.
Error tip:

Warning: mysqli::mysqli() [mysqli.mysqli]: (HY000/2003): Can’t connect to MySQL server on ‘localhost’ (10061) in D:\apmxe\htdocs\28\db_fns.php on line 5

Warning: mysqli::query() [mysqli.query]: Couldn’t fetch mysqli in D:\apmxe\htdocs\28\index.php on line 8

Fatal error: Call to a member function fetch_assoc() on a non-object in D:\apmxe\htdocs\28\index.php on line 12

Development environment: apmeexpress

How can these problems be solved?

Supplement: index.php Connection Database Part Code

$handle = db_connect();

  $pages_sql = 'select * from pages order by code';
  $pages_result = $handle->query($pages_sql);

  echo '<table border="0" width="400">';
      
  while ($pages = $pages_result->fetch_assoc()) 
  {
    $story_sql = "select * from stories
                  where page = '{$pages['code']}'
                  and published is not null
                  order by published desc";
   
    $story_result = $handle->query($story_sql);
    
    if ($story_result->num_rows) 
    {
      $story = $story_result->fetch_assoc();
      echo "<tr>
            <td>
              <h2>{$pages['description']}</h2>
              <p>{$story['headline']}</p>
              <p align='right' class='morelink'>
                <a href='page.php?page={$pages['code']}'>
                Read more {$pages['code']} ...
                </a>
              </p>
            </td>
            <td width='100'>";
/*db_connect函数功能*/
function db_connect()
{
   $handle = new mysqli('localhost', 'content', 'password', 'content'); 
   if (!$handle)
   {
     return false;
   }
   return $handle;
}

index.php执行出错界面

Is the password and account of mysqli link correct? ? ? ?