Consider our persons database table has the following records:
+----+------------+-----------+----------------------+
| id | first_name | last_name | email                |
+----+------------+-----------+----------------------+
|  1 | Peter      | Parker    | peterparker@mail.com |
|  2 | John       | Rambo     | johnrambo@mail.com   |
|  3 | Clark      | Kent      | clarkkent@mail.com   |
|  4 | John       | Carter    | johncarter@mail.com  |
|  5 | Harry      | Potter    | harrypotter@mail.com |
+----+------------+-----------+----------------------+


<br />
<b>Fatal error</b>:  Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in /data02/virt59468/domeenid/www.lorents.ee/htdocs/rakendused/php4/examples/mysql-select-query.php:16
Stack trace:
#0 /data02/virt59468/domeenid/www.lorents.ee/htdocs/rakendused/php4/examples/mysql-select-query.php(16): mysqli_connect('localhost', 'root', Object(SensitiveParameterValue), 'demo')
#1 {main}
  thrown in <b>/data02/virt59468/domeenid/www.lorents.ee/htdocs/rakendused/php4/examples/mysql-select-query.php</b> on line <b>16</b><br />