检索所有用户(userId和用户名)

时间:2012-10-06 23:02:43

标签: php mysql sql database

我想检索我的数据库中的所有用户并将它们放在一个包含两个元素的数组中;一个包含具有所有用户ID的数组,另一个包含具有所有用户名的数组。但是,下面的代码不适用于此目的。它的作用是将第一个用户放在$ field1(第一个用户的用户ID)和$ field2(第一个用户的用户名)的数据库中。

我需要帮助来解决这个问题。

基本上,我想要的是实现以下目标:

$userIds = array(1, 2, 3, 4, 5);    // The id's from all users in an array
$userNames = array("Nisse", "Kalle", "Svenne", "Jonna", "Linda");    // The usernames of all the users in an array

// The arrays with user id's and usernames should be put in a new array that's returned from the function.
$users = array(
  [0] => $userIds,
  [1] => $userNames
);
来自UserHandler.php的

class UserHandler {

    private $m_db = null;

    public function __construct(Database $db) {
        $this->m_db = $db;
    }

    public function GetAllUsers() {

        $userArray = array();

        $query = 'SELECT * FROM Users'; 

        $stmt = $this->m_db->Prepare($query);

        $userArray = $this->m_db->GetUsers($stmt);

        return $userArray;
    }
}
来自Database.php的

public function GetUsers(\mysqli_stmt $stmt) {
        $userArray = array();

        if ($stmt === FALSE) {
                throw new \Exception($this->mysqli->error);
        }

        //execute the statement
        if ($stmt->execute() == FALSE) {
                throw new \Exception($this->mysqli->error);
        }
        $ret = 0;

        if ($stmt->bind_result($field1, $field2, $field3) == FALSE) {
            throw new \Exception($this->mysqli->error);
        }

        $stmt->fetch();

        $stmt->Close();

        echo $field1 // "1";    <- userid of the first user in db table
        echo $field2 // "Kalle"    <- username of the first user in the db table

        $userArray[] = $field1;    // An array with all the user id's
        $userArray[] = $field2;    // An array with all the usernames

        return $userArray;
}

db表如下所示: userId |用户名|密码

1 个答案:

答案 0 :(得分:1)

仅在从结果表中获取第一行时才执行$stmt->fetch(),因此您需要在结果表中进行循环:

public function GetUsers(\mysqli_stmt $stmt) {
    $userArray = array(
        0 => array(),
        1 => array()
    );

    // the rest of code is the same here

    // replace the line $stmt->fetch() with this block
    while ($stmt->fetch()) {
        array_push($userArray[0], $field1);
        array_push($userArray[1], $field2);
    }

    // remove these lines
    /*
    $userArray[] = $field1;
    $userArray[] = $field2;
    */

    return $userArray
}