Question

我正在使用以下内容限制IP每5分钟发送1条消息。所以我想回应剩下的时间，我该如何计算呢？

这是我的PHP

$query = "SELECT * FROM messages WHERE ip = '$ip' AND mtime >= NOW() - INTERVAL 5 MINUTE";
$result = mysql_query($query);

if (mysql_num_rows($result) > 0) {
 echo "<script> 
           alert ('You can only send 5 message every 10min. please wait.')
       </script>";
} else {

}

Answer 1

如果你的mtime列包含microtime值，你可以这样做：

$query = "SELECT * FROM messages WHERE ip = '$ip' AND mtime >= NOW() - INTERVAL 5 MINUTE ORDER by mtime DESC";
$result = mysql_query($query);

if (mysql_num_rows($result) > 0) {
    $row = mysql_fetch_assoc($result);
    $diff = microtime(true) - $row['mtime']; //here the time difference between last sended message and this try
    $remaining = (5*60 - (int) $diff);
    ...
}
else {
    ...
}

我还更改了查询顺序，以便区分现在和最后一条消息。如果您以后需要每次检查5封邮件，则需要删除该订单。

如果microtime不工作，您可以使用时间功能：

$diff = time() - $row['mtime'];

Answer 2

在时间戳中首先得到当前时间

$c_time = strtotime(date('d-M-Y g:i:s'));

现在得到的时间超过5分钟

$l_time = $c_time-(5*60);

现在提出您的查询

    $query = "SELECT * FROM messages WHERE ip = '$ip' AND mtime >= '$l_time' ORDER by mtime DESC";
$result = mysql_query($query);

if (mysql_num_rows($result) > 0) {
    $row = mysql_fetch_assoc($result);
    $remaining_time = $c_time - $row['mtime']; // this will be remaining time in seconds use it accordingly

    ...
}
else {
    ...
}

我希望你能找到答案

PHP：如何计算上次插入时间和now（）之间的剩余时间

2 个答案: