php - DATEDIFF 和 NOW() mysql_fetch_array 错误

Question

我目前正在编写脚本。当用户发帖且时间差小于5分钟时，用户无法发帖。如果超过5分钟，他就可以发帖。我以为这段代码可以工作，但我收到 mysql_fetch_array 错误。我的代码有什么问题吗？

if ($db_found)
 {
 $check="SELECT * DATEDIFF(MINUTE, send_time, CURRENT_TIMESTAMP) FROM bloopp WHERE email = '$email' ORDER BY id DESC LIMIT 1";
 $res = mysql_query($check);
 $data = mysql_fetch_array($res, MYSQLI_NUM);
  if($data[0] < 5)
   {
   echo "You posted not so long ago.<br/>";
   }
  else
   {
   $sql="INSERT INTO bloopp (bloopp, browser, medium, send_time, email) VALUES ('$bloopp', '$browser', 'mobile', NOW(), '$email')";
   $result = mysql_query($sql); 
    if($result)
     {
     header('Location: index.php');
     }
     else
     {
      echo "Something has gone wrong. We’re sorry.";
     }
    }
 }
else
 {
 echo "ERROR";
 }

mysql_close();
?>

Answer 1

您在 * 之后缺少 ,

SELECT * DATEDIFF(MINUTE, send_time, CURRENT_TIMESTAMP) 

更改为

SELECT * ,DATEDIFF(MINUTE, send_time, CURRENT_TIMESTAMP) AS `diff` 

在查询中创建自定义列时最好指定别名