Php 一个问题是，当我们无法打开一个新的聊天室时，我们应该如何聊天？你可以使用评论，直到mod创建一个如上所述的聊天室。然后，所有人都可以使用新创建的房间。会议室达到目的后，尝试使用聊天室中讨论的其他细节更新问题/答案，然后将评论标记为“不再需要”。@Jonat

---

一个问题是，当我们无法打开一个新的聊天室时，我们应该如何聊天？你可以使用评论，直到mod创建一个如上所述的聊天室。然后，所有人都可以使用新创建的房间。会议室达到目的后，尝试使用聊天室中讨论的其他细节更新问题/答案，然后将评论标记为“不再需要”。@Jonathan Thunberg你能帮我吗？我的评论不适用于扩展讨论；这个对话已经结束。@SamuelLiew只是一个问题，当我们无法打开一个新的聊天室时，我们应该如何聊天？你可以使用评论，直到mod创建了一个如上所述的聊天室。然后，所有人都可以使用新创建的房间。一旦聊天室达到了目的，尝试使用聊天室中讨论的其他细节更新问题/答案，然后将评论标记为“不再需要”。@Jonathan Thunberg你能帮我吗

id  from_id   from_name      to_id   to_name     msg               sent_date
1   2         john           3       master      hi how are you?   2019-12-05 04:14:20
2   3         master         2       john        fine              2019-12-05 05:15:58
3   2         john           3       master      hi                2019-12-05 03:20:34
4   5         previn         2       john        hi                2019-12-05 08:30:40

userid | username | profile_pic

 <a href="cons.php?to_id=<?php echo $guaranteed_from_id ?>&to_name=<?php echo $row['from_name'];?>">Replay</a>

<?php
 if (isset($_SESSION['userid'])) {
    $session_id = $_SESSION['userid'];
  }

  if ($stmt = $con->prepare("SELECT * FROM pm WHERE from_id = ? OR to_id = ? ORDER BY sent_time DESC")) {
    $stmt->bind_param('ii', $session_id, $session_id);
    $stmt->execute();
  }

  $tempArray = array();

  $result = $stmt->get_result();

  if ($result->num_rows > 0) {
      while ($row = $result->fetch_assoc()) {

        if (!in_array($row['to_id'].$row['from_id'], $tempArray)) {

          echo "<br>";
          echo $row['from_id']." - " . $row['to_id']." ". $row['msg']. " - " .$row['sent_time'];


        $guaranteed_from_id = str_replace($session_id, null, $row['to_id'].$row['from_id']);


        ?>
<img src="images/<?php echo $row['profile_pic'];?>" height="20px" width="20px"/>
        <a href="cons.php?to_id=<?php echo $guaranteed_from_id ?>&to_name=<?php echo $row['from_name'];?>">Replay</a>

        <?php

 }


        array_push($tempArray, $row['from_id'].$row['to_id']);
        array_push($tempArray, $row['to_id'].$row['from_id']);

      }
  } else {
      echo "NO MESSAGES";
  }

?>

id  from_id     to_id    msg               sent_date
1   2           3        hi how are you?   2019-12-05 04:14:20
2   3           2        fine              2019-12-05 05:15:58
3   2           3        hi                2019-12-05 03:20:34
4   5           2        hi                2019-12-05 08:30:40

id    username   profile_pic         
1     john       <link to profile picture>
2     master     <link to profile picture>          
3     john       <link to profile picture>          
4     previn     <link to profile picture>
4     robin      <link to profile picture>

    if (isset($_SESSION['userid'])) {
        $session_id = $_SESSION['userid'];
      }

        $sql = "SELECT *,
  (SELECT username FROM users WHERE userid=from_id) AS from_username,
  (SELECT username FROM users WHERE userid=to_id) AS to_username,
  (SELECT username FROM users WHERE userid=?) AS my_username,
  (SELECT profile_pic FROM users WHERE userid=from_id) AS from_profile_pic,
  (SELECT profile_pic FROM users WHERE userid=to_id) AS to_profile_pic,
  (SELECT profile_pic FROM users WHERE userid=?) AS my_profile_pic
  FROM pm WHERE from_id = ? OR to_id = ? ORDER BY id DESC";


  if ($stmt = $con->prepare($sql)) {
     $stmt->bind_param('iiii', $session_id, $session_id, $session_id, $session_id);
     $stmt->execute();
   }

   $tempArray = array();

   $result = $stmt->get_result();

   if ($result->num_rows > 0) {
       while ($row = $result->fetch_assoc()) {





         if (!in_array($row['to_id'].$row['from_id'], $tempArray)) {

            $friend_id = str_replace($session_id, null, $row['to_id'].$row['from_id']);

            $title = $row['from_username'].$row['to_username'];
            $num = strlen($title) ;

            $num = $num/2;

            $first_half = substr($title,0, $num);

            $second_half = substr($title, $num);


            if ($first_half == $second_half) {
              $friend_username = $row['from_username'];
            } else {
              $friend_username = str_replace($row['my_username'], null, $row['from_username'].$row['to_username']);
            }

            $friend_profile_pic = str_replace($row['my_profile_pic'], null, $row['from_profile_pic'].$row['to_profile_pic']);

            echo "<br>";
            echo $row['from_username'] . " - " . $row['to_username']." ". $row['msg']. " - " .$row['sent_time'];

         ?>

           <img src="images/<?php echo $friend_profile_pic;?>" height="20px" width="20px"/>
           <a href="cons.php?to_name=<?php echo $friend_username ?>&to_id=<?php echo $friend_id ?>">Reply</a>

         <?php

  }


         array_push($tempArray, $row['from_id'].$row['to_id']);
         array_push($tempArray, $row['to_id'].$row['from_id']);

       }
   } else {
       echo "NO MESSAGES";
   }