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return [
    // Êý¾Ý¿âÀàÐÍ
    'type'     => 'mysql',
    // ЧÀÍÆ÷µØµã
    'hostname' => 'localhost',
    // Êý¾Ý¿âÃû
    'database' => 'test',
    // ̞
    'username' => 'root',
    // ÃÜÂë
    'password' => '',
    // ¶Ë¿Ú
    'hostport' => '3306',
    // Êý¾Ý¿â±àÂëĬÈϽÓÄÉutf8
    'charset'  => 'utf8',
];

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// ½¨ÉèÒ»¸öUserÄ£×ÓʵÀý
$user = new \app\model\User();
// ÅÌÎÊËùÓÐÓû§µÄÓû§Ãû
$usernames = $user->field('username')->select();
// ´òÓ¡Óû§Ãû
foreach ($usernames as $username) {
    echo $username['username'] . "<br/>";
}

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// ½¨ÉèÒ»¸öUserÄ£×ÓʵÀý
$user = new \app\model\User();
// ÅÌÎÊidΪ1µÄÓû§µÄÓû§Ãû
$username = $user->where('id', 1)->value('username');
// ´òÓ¡Óû§Ãû
echo $username;

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// ½¨ÉèÒ»¸öUserÄ£×ÓʵÀý
$user = new \app\model\User();
// ÅÌÎÊÇ°10¸öÓû§µÄÓû§Ãû
$usernames = $user->field('username')->limit(10)->select();
// ´òÓ¡Óû§Ãû
foreach ($usernames as $username) {
    echo $username['username'] . "<br/>";
}

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