为什么我不能将sql数据库中的时间戳与php中的当前时间进行比较？

sql表包含以时间戳形式保存的时间

您可以试试这个

将此代码粘贴到head部分，并用您的网站url替换Anywhere.com

<script type="text/javascript">
    $(document).ready(function() {
        if("<?php echo $timezone; ?>".length==0){
            var visitortime = new Date();
            var visitortimezone = "GMT " + -visitortime.getTimezoneOffset()/60;
            $.ajax({
                type: "GET",
                url: "http://anyone.com/timezone.php",
                data: 'time='+ visitortimezone,
                success: function(){
                    location.reload();
                }
            });
        }
    });
</script>

还可以在标题中添加jquery

新代码将被删除

 <?php
      include 'con.php';
      $token = $_GET['key'];
      $sql = "Select * FROM userlogin WHERE token = '$token'";
      $result = mysqli_query($connect,$sql);
      $user = mysqli_fetch_array($result);

      $time = $user['time'];
      $gmt  = $user['gmttime'];

       $timezone2 = str_replace("GMT", "", $gmt);

       $sec = 3600 * $timezone2;

      $gmtdate = gmdate("Y-m-d H:i:s");

      $current_time =  date( "Y-m-d H:i:s", strtotime($gmtdate) + ($sec)); 

      $user_time = date( "Y-m-d H:i:s", strtotime($time) + 1800 ); 




      if($current_time > $user_time) {          // check if the current time is greater than $user['time']+30 minutes
         exit("Link has expired");
      }
      else{
      //your code part here
      }
      ?>

@janejoe您缺少一些东西，请纠正您的状况，如：

 <?php
  include 'con.php';
  $token = $_GET['key'];
  $sql = "Select * FROM userlogin WHERE token = '$token'";
  $result = mysqli_query($connect,$sql);
  $user = mysqli_fetch_array($result);
  $limitTime = date("Y-m-d H:i:s", strtotime($user['time']) + 1800);
  if(date("Y-m-d H:i:s") > $limitTime) {          // check if the time is greater than 30 minutes then the link will expire.
    echo "current date time :". date("Y-m-d H:i:s");
     exit("Link has expired");
  }
?>

我会在MySQL中完成

  <?php
  include 'con.php';

  $token = $_GET['key'];

  $sql = "SELECT * FROM userlogin WHERE token = '$token' AND time BETWEEN TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 MINUTE)) AND TIMESTAMP(NOW())";
  $result = mysqli_query($connect, $sql);
  if (!mysqli_num_rows($result)) {
    exit("Link has expired");
  }

  $user = mysqli_fetch_array($result);

  // etc.
  ?>

时间将采用哪种格式，您可以用它更新您的问题吗？它使用时间戳保存在sql中，看起来像2017-04-17 13:00:00@rahul_mif（$current_time>$user_time）{echo$current_time.\n“$user_time；}//我尝试回显它，但结果是2017-04-17 10:20:53 2017-04-17 15:37:25用户时间正确，但当前时间错误如何更改@Sandeepu您是否设置了日期默认时区？不，我不想要默认时区，它将为每个用户存储在数据库中。我将如何做到这一点？您的$user_time和$current_time应该位于同一时区@janejoeho我将如何做到@如果（time（）>$limitTime）{echo$current\u time.“\n”。$user\u time；}//我试图回显它，但结果是2017-04-17 10:30:27 2017-04-17 16:58:55$limitTime是正确的，但current time（）是错误的@地堡男孩
$timezone = $_SESSION['time'];

 <?php
      include 'con.php';
      $token = $_GET['key'];
      $sql = "Select * FROM userlogin WHERE token = '$token'";
      $result = mysqli_query($connect,$sql);
      $user = mysqli_fetch_array($result);

      $time = $user['time'];
      $gmt  = $user['gmttime'];

       $timezone2 = str_replace("GMT", "", $gmt);

       $sec = 3600 * $timezone2;

      $gmtdate = gmdate("Y-m-d H:i:s");

      $current_time =  date( "Y-m-d H:i:s", strtotime($gmtdate) + ($sec)); 

      $user_time = date( "Y-m-d H:i:s", strtotime($time) + 1800 ); 




      if($current_time > $user_time) {          // check if the current time is greater than $user['time']+30 minutes
         exit("Link has expired");
      }
      else{
      //your code part here
      }
      ?>

 <?php
  include 'con.php';
  $token = $_GET['key'];
  $sql = "Select * FROM userlogin WHERE token = '$token'";
  $result = mysqli_query($connect,$sql);
  $user = mysqli_fetch_array($result);
  $limitTime = date("Y-m-d H:i:s", strtotime($user['time']) + 1800);
  if(date("Y-m-d H:i:s") > $limitTime) {          // check if the time is greater than 30 minutes then the link will expire.
    echo "current date time :". date("Y-m-d H:i:s");
     exit("Link has expired");
  }
?>

  <?php
  include 'con.php';

  $token = $_GET['key'];

  $sql = "SELECT * FROM userlogin WHERE token = '$token' AND time BETWEEN TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 MINUTE)) AND TIMESTAMP(NOW())";
  $result = mysqli_query($connect, $sql);
  if (!mysqli_num_rows($result)) {
    exit("Link has expired");
  }

  $user = mysqli_fetch_array($result);

  // etc.
  ?>