how use mysql_data_seek with PDO?

Question

I want use mysql_data_seek with PDO from google search I found that it should looks like this:

$row0 = $result->fetch(PDO::FETCH_ASSOC, PDO::FETCH_ORI_ABS         


        

Answer 1

$result = $arrayData[4];

is all you need.

Answer 2

the PDO 'cursor' default is PDO::CURSOR_FWDONLY that means that cursor can't back to zero like it happens with mysql_data_seek to allow cursor back to zero it necessary define use 'scrollable cursor'

example:

$db->prepare($query, array(PDO::ATTR_CURSOR => PDO::CURSOR_SCROLL));

before use it like this:

$row0 = $result->fetch(PDO::FETCH_ASSOC, PDO::FETCH_ORI_ABS, 0);

Answer 3

You could do it like this:

$c = 1;
$saved=null; 
while($row = $q->fetch()){
    if($c==4){
        $saved = clone $row;
    };
    $c++;
    somethingelse;
}

$saved will then contain the 4th element as an object with almost no extra overhead calculations.

Answer 4

If you want the 5th row result you can do like this:

$result = json_decode(json_encode($arrayData[4]), FALSE);
var_dump($result);

or something like this:

$object = new stdClass();
foreach ($array as $key => $value)
{
    $object->$key = $value;
}

Just curious! why do you need the object form?

EDIT (this will give the object form of the 5th row):

$index = 0;
$fifthRow = new stdClass();
while($row = $q->fetch())
{
   if($index++==4)
        $fifthRow = json_decode(json_encode($row), FALSE);
}