我无法使用'fetch（PDO :: FETCH_ASSOC）'从表中获取数据

Question

Why does fetch (PDO::FETCH_ASSOC) not work properly? How can I get the data I want from the table without a foreach loop? I have used the $statement variable before to prepare/execute another query. Could this be the problem?

try
{
    $database = new PDO ('mysql:host=localhost;dbname=youdonotneedtoknow;charset=utf8', 'youdonotneedtoknow', 'youdonotneedtoknow');
    $database -> setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $database -> setAttribute (PDO::ATTR_EMULATE_PREPARES, true);

    //Read
    $statement = $database -> prepare ('SELECT * FROM edit');
    $statement -> execute ();
    while ($row = $statement -> fetch (PDO::FETCH_ASSOC))
    {
        $windowTitle = $row ['windowTitle'];
        $bodyBackgroundColour = $row ['bodyBackgroundColour'];
        $divisionBackgroundColour = $row ['divisionBackgroundColour'];
    }
}
catch (PDOException $exception)
{
    die ('Error: ' . $exception -> getMessage () . '<br><br>' . 'Por favor diríjase a "index.php" en este mismo directorio y contacte a su administrador.');
}

Answer 1

Do this:

while ($row = $statement -> fetch (PDO::FETCH_ASSOC))
{
    switch ($row['id']) {
        case 'windowTitle':
            $windowTitle = $row ['value'];
            break;
        case 'bodyBackgroundColour':
            $bodyBackgroundColour = $row['value'];
            break;
        case 'divisionBackgroundColour':
            $divisionBackgroundColour = $row['value'];
            break;
    }
}

You could also use variable variables:

while ($row = $statement -> fetch (PDO::FETCH_ASSOC))
{
    ${$row['id']} = $row['value'];
}