Cant get it to work with PHPbb View latest post codes?

I try to show latest post on a widget but many of the plugins dont have the option i want also they arent pretty at my sites theme

i there wanted to use a code there are working on normal pages.

I try to use this code

?php

$connect = mysql_connect('localhost', 'mysql_user', 'mysql_password') or die(mysql_error());
mysql_select_db('databasename') or die(mysql_error());

$query  = "SELECT forum_id, topic_id, post_id, post_subject FROM phpbb_posts WHERE post_approved='1' ORDER BY post_time DESC limit 10";
$result = mysql_query($query) or die(mysql_error());

while($row = mysql_fetch_array($result, MYSQL_ASSOC)) {

    echo "<a href=\"/forum/viewtopic.php?f={$row['forum_id']}&t={$row['topic_id']}&p={$row['post_id']}#p{$row['post_id']}\">".$row['post_subject']."</a><br />";

}

mysql_close($connect);

?>

But it dont show anything.

https://wordpress.org/plugins/php-code-widget/