(PHP 5 >= 5.1.0, PECL pdo >= 0.2.0)
PDOStatement::setFetchMode — Set the default fetch mode for this statement
$mode
   )$PDO::FETCH_COLUMN
   , int $colno
   )$PDO::FETCH_CLASS
   , string $classname
   , array $ctorargs
   )$PDO::FETCH_INTO
   , object $object
   )
modeThe fetch mode must be one of the PDO::FETCH_* constants.
colnoColumn number.
classnameClass name.
ctorargsConstructor arguments.
objectObject.
   Returns TRUE on success or FALSE on failure.
  
Example #1 Setting the fetch mode
The following example demonstrates how PDOStatement::setFetchMode() changes the default fetch mode for a PDOStatement object.
<?php
$sql = 'SELECT name, colour, calories FROM fruit';
try {
  $stmt = $dbh->query($sql);
  $result = $stmt->setFetchMode(PDO::FETCH_NUM);
  while ($row = $stmt->fetch()) {
    print $row[0] . "\t" . $row[1] . "\t" . $row[2] . "\n";
  }
}
catch (PDOException $e) {
  print $e->getMessage();
}
?>
The above example will output:
apple red 150 banana yellow 250 orange orange 300 kiwi brown 75 lemon yellow 25 pear green 150 watermelon pink 90