PDOStatement::setFetchMode

(PHP 5 >= 5.1.0, PECL pdo >= 0.2.0)

PDOStatement::setFetchMode Set the default fetch mode for this statement

Description

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

Parameters

mode

The fetch mode must be one of the PDO::FETCH_* constants.

colno

Column number.

classname

Class name.

ctorargs

Constructor arguments.

object

Object.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

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

Коментарии

Some note on PDO :: FETCH_CLASS | PDO :: FETCH_CLASSTYPE

It took me some time, to realize, that you can not use this fetch-mode in $stm->setFetchMode(), when you want to retrieve objects from the database whereas the type is defined by the first column in the resultset.
You have to define this mode directly in the $stm->fetch() method.

To make it clearer:

$stm = $pdo->query("SELECT * FROM `foo`);
$stm->setFetchMode(FETCH_CLASS | PDO :: FETCH_CLASSTYPE);

$object = $stm->fetch();

Will not return the expected object, whereas

$stm = $pdo->query("SELECT * FROM `foo`");

$object = $stm->fetch(FETCH_CLASS | PDO :: FETCH_CLASSTYPE);

will give you the object of the class, defined in the first column of `foo`.
2007-11-19 18:04:24
http://php5.kiev.ua/manual/ru/pdostatement.setfetchmode.html
if you want to fetch your result into a class (by using PDO::FETCH_CLASS) and want the constructor to be executed *before* PDO assings the object properties, you need to use the PDO::FETCH_PROPS_LATE constant:

<?php
$stmt 
$pdo->prepare("your query");

$stmt->setFetchMode(PDO::FETCH_CLASS|PDO::FETCH_PROPS_LATE"className"$constructorArguments);

# pass parameters, if required by the query
$stmt->execute($parameters);

foreach (
$stmt as $row)
{
   
// do something with (each of) your object
}
?>
2010-07-13 05:16:22
http://php5.kiev.ua/manual/ru/pdostatement.setfetchmode.html
Автор:
Something very helpful is knowing how to access namespaces from the function. It took me a minute (and Google) to figure out. The ::class property is going to be your best friend in this case.

<?php
$stmt
->setFetchMode(PDO::FETCH_CLASSName\Space\Class::class);
?>
2017-08-25 00:02:02
http://php5.kiev.ua/manual/ru/pdostatement.setfetchmode.html

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