MySQL中以下划线形式存储的文本中的空格

我通过向带有函数的url发送请求，将文本存储在MySQL中

url用%20编码为空格，这很好，但当它存储在MySQL中时，空格将替换为下划线33;

这是一个句子->这是一个句子

有没有办法避免这个问题

代码如下：

    function new_experiment_reply($thread_title = '', $raven_thread_id = '', $text = '', $forum_url = '', $raven_forum_id = '')
{
    $email = $this->session->userdata('email');
    $query = $this->db->query("SELECT id FROM fn_users WHERE email='" . $email . "'");
    $fn_user_id = $query->first_row()->id;
    $query = $this->db->query("SELECT username FROM forum_users WHERE fn_user_id='" . $fn_user_id . "' AND raven_forum_id='" . $raven_forum_id . "'");
    $username = $query->first_row()->username;
    $date = date("Y-m-d H:i");
    $query = $this->db->query('INSERT INTO promo_replies(thread_title, raven_thread_id, text, forum_url, raven_forum_id, date, fn_user_id, username) VALUES("'. $thread_title .'", "'. $raven_thread_id .'", "'. $text .'", "'. $forum_url . '", "'. $raven_forum_id . '", "'. $date . '", "'. $fn_user_id . '", "'. $username . '") ');
}

变量的插入值（如Fiddler中所示，也应如此）：

回显查询后，我得到以下结果：

INSERT INTO promo_replies
    (thread_title, raven_thread_id, text, forum_url, raven_forum_id, date, fn_user_id, username) 
VALUES
    ("Facebook_vs_Google", "123441", "This_is_a_sentence", "domain_com", "32", "2012-09-06 06:04", "8", "usssaa")

---

我已经准备好接受关于代码的抨击，所以不用担心

你能提供函数本身吗？默认情况下它不是这样的，而是你自己做的。我添加了函数本身！感谢您的时间。

$thread\u title

（或其他相关变量）在您将其插入数据库之前的值是：“$thread\u title.”、“$raven\u thread\u id.”、“$text.”、forum\u url、raven\u forum\u id、date、fn\u user\u id、username）值（“$thread\u title.”、“$raven\u thread\u id.”、“$text.”、“，“.$forum_url.”、“.$raven_forum_id.”、“.$date.”、“.$fn_user_id.”、“.$username.”“；在函数的最后一行之后，检查查询内容。

INSERT INTO promo_replies
    (thread_title, raven_thread_id, text, forum_url, raven_forum_id, date, fn_user_id, username) 
VALUES
    ("Facebook_vs_Google", "123441", "This_is_a_sentence", "domain_com", "32", "2012-09-06 06:04", "8", "usssaa")