PHP PDOStatement::setFetchMode讲解

bool PDOStatement::setFetchMode ( int $mode )
bool PDOStatement::setFetchMode ( int $PDO::FETCH_COLUMN , int $colno )
bool PDOStatement::setFetchMode ( int $PDO::FETCH_CLASS , string $classname , array $ctorargs )
bool PDOStatement::setFetchMode ( int $PDO::FETCH_INTO , object $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();
}
?>