public static function generateCode()
{
if (!self::$_codes) {
self::$_codes = ArrayHelper::getColumn(self::find()->select('code')->all(), 'code');
}
$chars = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z');
$code = '';
$generated = false;
while (!$generated) {
for ($j = 0; $j < 4; $j++) {
$r = rand(0, count($chars) - 1);
$code .= $chars[$r];
}
if (!in_array($code, self::$_codes)) {
$generated = true;
} else {
$code = '';
}
}
return $code;
}
private static function _loadVoted()
{
self::$_voted = array_map(function ($a) {
return $a['snippet_id'];
}, Vote::find()->select('snippet_id')->where(['ip' => ip2long(Yii::$app->request->userIP), 'fingerprint' => md5(Yii::$app->request->userAgent)])->asArray()->all());
}