php sql不工作

Question

查询没有更新，不确定我做错了什么。

$q_result = mysql_query("UPDATE 
                           users 
                         SET
                           recovery_answer = '".$_POST['answer']."', 
                           recovery_question = '".$_POST['question']."',  
                           date_question_set = '" . mysql_real_escape_string($register_date) . "' 
                         WHERE
                           username='" . mysql_real_escape_string($_SESSION['username']) . "'");

Answer 1

你能回应"UPDATE users SET recovery_answer = '".$_POST['answer']."', recovery_question = '".$_POST['question']."',吗？

                        `date_question_set = '" . mysql_real_escape_string($register_date) . "'                           WHERE                            username='" . mysql_real_escape_string($_SESSION['username']) . "'"` and post?