类函数不能正确返回数组

Question

我似乎无法让数组从函数中正确返回，每次运行脚本时它只是回显0，即使我已经检查过MySQL查询返回至少1行。我也尝试过使用$_GLOBALS["FORUM_ANSWERS"][] = ...，但它仍然没有用。

public function getAnswers() {
    $dbh = $this->dbh;
    $id = $this->question_id;
    $q = $dbh->prepare("SELECT * FROM answers WHERE question_id = :id");
    $q->bindParam(":id", $id);
    $q->execute();
    $nr = $q->rowCount();
    if ($nr == 0) {
        echo "No Questions";
    }

    $_GLOBALS["FORUM_ANSWERS"] = [];
    while ($row = $q->fetch(PDO::FETCH_ASSOC)) {

        array_push($_GLOBALS["FORUM_ANSWERS"], array(
            "num_id" => $row["num_id"],
            "question_id" => $row["question_id"],
            "answer" => $row["answer"],
            "name" => $row["name"],
            "username" => $row["username"],
            "ip" => $row["ip"],
            "date" => $row["date"],
        ));
    }

    return $GLOBALS["FORUM_ANSWERS"];
}

单独文件：

$answers = $forum->getAnswers();
echo count($answers);

Answer 1

您正在分配给$_GLOBALS并返回$GLOBAL。

你实际上并不需要使用全局数组 - 我只是将数组赋值给一个变量（在函数中初始化）并返回它。