As far as I can tell all the semi colons are there. I get no error messages. but print_r($query); get me nothing...don't understand what I got wrong?

PHP Code:
<?php
//a_db my database
//tab01 my table
//title one of the rows in my table

$config ['db']    = array(
'host'        =>'localhost',
'username'    =>'root',
'password'    =>'',
'dbname'    =>'a_db'
);
 
$db = new PDO('mysql:host'.$config['db']['host'].';dbname'.$config['db']['dbname'],$config['db']['username'], $config['db']['password']);
$query $db->query("SELECT `tab01`.`title` FROM `tab01`");

print_r($query);
  
?>