mixed PDOStatement::fetch ([ int $fetch_style [, int $cursor_orientation = PDO::FETCH_ORI_NEXT [, int $cursor_offset = 0 ]]] )

<"SELECT name, colour FROM fruit");
$sth->execute();
/* 运用 PDOStatement::fetch 风格 */
print("PDO::FETCH_ASSOC: ");
print("Return next row as an array indexed by column name\n");
$result = $sth->fetch(PDO::FETCH_ASSOC);
print_r($result);
print("\n");
print("PDO::FETCH_BOTH: ");
print("Return next row as an array indexed by both column name and number\n");
$result = $sth->fetch(PDO::FETCH_BOTH);
print_r($result);
print("\n");
print("PDO::FETCH_LAZY: ");
print("Return next row as an anonymous object with column names as properties\n");
$result = $sth->fetch(PDO::FETCH_LAZY);
print_r($result);
print("\n");
print("PDO::FETCH_OBJ: ");
print("Return next row as an anonymous object with column names as properties\n");
$result = $sth->fetch(PDO::FETCH_OBJ);
print $result->NAME;
print("\n");
"htmlcode">

PDO::FETCH_ASSOC: Return next row as an array indexed by column name
Array
(
  [NAME] => apple
  [COLOUR] => red
)
PDO::FETCH_BOTH: Return next row as an array indexed by both column name and number
Array
(
  [NAME] => banana
  [0] => banana
  [COLOUR] => yellow
  [1] => yellow
)
PDO::FETCH_LAZY: Return next row as an anonymous object with column names as properties
PDORow Object
(
  [NAME] => orange
  [COLOUR] => orange
)
PDO::FETCH_OBJ: Return next row as an anonymous object with column names as properties
kiwi


使用一个可滚动游标获取行


<"\t" . $row[1] . "\t" . $row[2] . "\n";
   print $data;
  }
  $stmt = null;
 }
 catch (PDOException $e) {
  print $e->getMessage();
 }
}
function readDataBackwards($dbh) {
 $sql = 'SELECT hand, won, bet FROM mynumbers ORDER BY bet';
 try {
  $stmt = $dbh->prepare($sql, array(PDO::ATTR_CURSOR => PDO::CURSOR_SCROLL));
  $stmt->execute();
  $row = $stmt->fetch(PDO::FETCH_NUM, PDO::FETCH_ORI_LAST);
  do {
   $data = $row[0] . "\t" . $row[1] . "\t" . $row[2] . "\n";
   print $data;
  } while ($row = $stmt->fetch(PDO::FETCH_NUM, PDO::FETCH_ORI_PRIOR));
  $stmt = null;
 }
 catch (PDOException $e) {
  print $e->getMessage();
 }
}
print "Reading forwards:\n";
readDataForwards($conn);
print "Reading backwards:\n";
readDataBackwards($conn);
?>


以上实例会输出：

Reading forwards:

21    10    5

16    0     5

19    20    10

Reading backwards:

19    20    10

16    0     5

21    10    5

总结
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