Question

我被困住了。我在datetime表中有一个colummn comments的数据库。基本上，当用户添加新评论时，它将被插入此表中并存储日期时间。所以我现在要做的就是检查是否，自从他上次评论以来已经过了1分钟。但是我在if声明中一直都是如此。好。发布之前，这是最后一次检查。输出不符合预期。我的代码。

$limits = new Limits();
$user = new User();
$time = new DateTime();

$time->add(new DateInterval('PT' . 1 . 'M'));
$stamp = $time->format('Y-m-d H:i:s');
$limit = $limits->check_comment_limit($user->loggedInUser());

if($limit->time < $stamp){
echo 'Take a brake';
}
//for debugging
echo $stamp . '<br>';//2014-03-18 13:38:41
echo $limit->time; //2014-03-18 01:37:37

Ok obviusly $limit->time比$stamp更为敏捷。使用time()很简单time() + 60，但如何使用datetime执行此操作？

Answer 1

我认为这是你想做的事：

<?php
 date_default_timezone_set('UTC'); 

 // Get current datetime.
 $now = new DateTime("now");

 // Get last comment datetime.
 $comment = new DateTime('2014-03-18 13:26:00');

 // Get interval limit between comments.
 $limit = new DateInterval('PT1M');

 // Calculate the difference between the current and last commented datetime.
 $diff = $now->diff($comment);

 // Calculate the total minutes.
 $minutes = $diff->days * 24 * 60;
 $minutes += $diff->h * 60;
 $minutes += $diff->i;

 // Debug output
 echo $now->format('Y-m-d H:i:s').'<br>';
 echo $comment->format('Y-m-d H:i:s').'<br>';
 echo $limit->i.'<br>';
 echo $minutes.' minutes <br>';

 // Limit smaller than difference? Next comment is allowed.
 if($limit->i <= $minutes) {
    echo "Your comment has been saved!";
 } else {
echo "Your aren't allowed to comment now. Wait ".intval($limit->i*60 - 
      $diff->format('%s'))." seconds until you are allowed to comment again.";
 }
 ?>

编辑：添加了总分钟的缺失计算。否则，计算不适用于具有相同分钟但是其他日期或小时的日期。

另一个更简单/更通用（处理每个间隔）的解决方案是这样的：

<?php
date_default_timezone_set('UTC'); 

// Get current datetime.
$now = new DateTime("now");

// Get last comment datetime.
$comment = new DateTime('2014-03-18 16:45:00');

// Get and add interval limit to comments.
$limit = new DateInterval('PT1M');
$comment->add($limit);

// Debug output
echo $now->format('Y-m-d H:i:s').'<br>';
echo $comment->format('Y-m-d H:i:s').'<br>';

// Limit smaller than difference? Next comment is allowed.
if($comment <= $now) {
    echo "Your comment has been saved!";
} else {
    echo "Your aren't allowed to comment now. On ".$comment->format('Y-m-d H:i:s')." you 
            are allowed to comment again.";
}
?>

添加时间到datetime并检入if语句

1 个答案: