OOP PDO在循环时获取

Question

I have a function in my class which is not completed. I'm searching a way to do it all night long. Well I want to fetch all the result of a SELECT request to MYSQL using PDO in a OOP class/function.

Here my function

function select($query)
{
    try
    {
    $sql = $this->connect->query($query);
        while ($row = $sql->fetch(PDO::FETCH_ASSOC))
        {
        return ????
        }
    }
    catch(PDOException $e) 
    {  
        echo $e->getMessage(); 
    }

}

I know that I can do it with a while loop, I tested a few options but most of the time I only got 1 result. Anyone a point for me, where I could start my search for a solution to this issue?

Answer 1

It's pretty easy, actually. You use PDO::FETCH_CLASS and specify which class you want to instantiate for each row.

Here is an example that fetches all available rows as an array of objects of class YourClassName .

function select($query) {
    try {
        $sql = $this->connect->query($query);
        return $sql->fetchAll(PDO::FETCH_CLASS, YourClassName);
    } catch(PDOException $e) {  
        echo $e->getMessage(); 
    }
}

Answer 2

Only use $sql->fetch(PDO::FETCH_ASSOC) within the while loop, not before, as you have it.

So, like:

while($row = $sql->fetch(PDO::FETCH_ASSOC)) {
    // something
}