<?php
$connection = mysqli_connect('127.0.0.1','root','','test_db');
if( $connection == false )
{
echo 'Не удалось поключиться к базе данных!<br>';
echo mysqli_connect_error();
exit();
}
$result = mysqli_query($connection,"SELECT * FROM articles_categories");
?>
<ul>
<?php
while( ($cat = mysqli_fetch_assoc($result)) )
{
echo '<li>' . $cat['title'] . '</li>';
}
?>
</ul>>
<?php
mysqli_close($connection);
?>