php - 删除数组键，只留下数据

Question

我有一个来自数据库的数组，我只想留下productnames没有要显示的数组结构。

public function selectAll () 
{
    $stmt = Database::get()->query('SELECT `productname` FROM retrofootball_products');
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

这个的输出是

Array ( [0] => Array ( [productname] => Manchester City 1981 Centenary FA Cup Final Shirt ) [1] => Array ( [productname] => Manchester City 1999 Playoff Winning Shirt ) )

我想留下来

Manchester City 1981 Centenary FA Cup Final Shirt, Manchester City 1999 Playoff Winning Shirt

Answer 1

如果你想用逗号分隔使用implode

Answer 2

您可以使用implode：

implode(',', $smt->fetchAll(PDO::FECTH_ASSOC));