登录时将NOW()插入MySQL列

Question

DATETIME当用户登录他们的帐户时,我正试图将当前插入MySQL.屏幕上没有显示错误,登录但NOW()未插入.我已经检查过MySQL中的列声明并且它是正确的 - DATETIME

我的PHP在下面

         if(isset($_POST['username']) && isset($_POST['password'] )) {         
          $query = mysql_query("SELECT username, password, image_name
                  FROM forum_login
                  WHERE username = '$username'
                  AND password = '$password'") or die (mysql_error());

                  $user = mysql_num_rows($query); 
                      if($user == 1) { 
                  $row = mysql_fetch_assoc($query);
                  $_SESSION['username'] = $row['username'] ;
                  $_SESSION['image_name'] = $row['image_name']  ;

                  $login_time = mysql_query("UPDATE forum_login
                                             SET last_login = 'NOW()'
            WHERE username = '".$_SESSION['username']."'") or die (mysql_error());
              header('Location: http://127.0.0.1/tapmichiana/'); 
              die;
                } 

             else 
             {        

                         echo "<div class='OpenError' >";
                         echo "Username & Password Combination Is Wrong"; 
                         echo "</div>";

                 }

我没有展示数据清理和清理的部分脚本

Answer 1

不引用NOW().

 UPDATE forum_login
 SET last_login = NOW()