info.php

<?php
$pdo = new PDO(
    'mysql:host=localhost;dbname=yiitest',
    '',
    ''
);
$sth = $pdo->prepare("SELECT * FROM bit_values");
$sth->execute();
$r = $sth->fetchAll(PDO::FETCH_ASSOC);
echo '<pre>'; var_dump($r); echo '</pre>'; die();

/**
 array(2) {
  [0]=>
  array(2) {
    ["id"]=>
    string(1) "1"
    ["val"]=>
    string(1) ""
  }
  [1]=>
  array(2) {
    ["id"]=>
    string(1) "2"
    ["val"]=>
    string(1) ""
  }
}
 */