如何使用PHP从foreach循环返回多个值

Question

Here's my function

function GetUser($id)
{
    global $pdo;
    $stmt = $pdo->prepare('SELECT lname,fname,mi FROM user WHERE id = :id LIMIT 1');
    $stmt->execute(array(':id'=>$id));
    foreach($stmt as $name){
        $lname = $name['lname'];
        $lname = $name['fname'];
        $mi = $name['mi'];
    }

    return //what to put here?
}

Here's my code to use the function

include 'function.php';
$names = GetUser($_SESSION['id']);
//what's next?

How can i retrieve the $lname,$fname and $mi from the function? Need any help and suggestions. Thank you :)

Answer 1

For starters don't use the global keyword, but inject the variable you need. Second why don't you return an array?:

function getUser($pdo, $id)
{
    $stmt = $pdo->prepare('SELECT lname,fname,mi FROM user WHERE id = :id LIMIT 1');
    $stmt->execute(array(':id'=>$id));

    $result = array();
    foreach($stmt as $name){
        $result['lname'] = $name['lname'];
        $result['fname'] = $name['fname'];
        $result['mi']  = $name['mi'];
    }

    return $result;
}

$result = getUser($pdo, 1);
var_dump($result);

Note that this will only return the last result. If you want it all:

function getUser($pdo, $id)
{
    $stmt = $pdo->prepare('SELECT lname,fname,mi FROM user WHERE id = :id LIMIT 1');
    $stmt->execute(array(':id'=>$id));

    return $stmt->fetchAll();
}

$result = getUser($pdo, 1);
var_dump($result);

Also note that I have made your function name starting with a normal letter instead of a capital. The "normal" naming convention is that classes start with a capital, but function / methods with a normal one.

If you want to retrieve the information based on the first solution you would do:

echo $result['lname'];

If you want to retrieve the information based on the second solution you would do:

echo $result[0]['lname'];