How to disable modal auto close

How do i disable bootstrap auto disappear?

I was doing an error message using bootstrap modal what i want is let use to click the button to close the error message.

But i was facing is the modal will be call out but it will auto disappear after 2 to 3 sec left the backdrop background only.

This is my error message but if user didn't click the leave button it will disappear

Than it will be like this

How do i solve this?

Here is my bootstrap modal coding

  if($check==0){
if($total_user_in_any_chatroom >=2) {
    echo "<script>$(document).ready(function(){ $('#remind-user-chatroom').modal('show'); });</script>
<a href='chatrooms.php'>
    <div class ='modal fade' id ='remind-user-chatroom' role ='dialog'>
        <div class ='modal-dialog'>
            <div class ='modal-content'>
                <div class ='modal-header'>
                    <button type='class' class ='close' data-dismiss ='modal'>&times;</button>
                    <label class ='modal-title'>Reminder</label>
                </div>
                <div class ='modal-body'>
                    <span>This room is full. While waiting you can enter other chat roon.Thank You</span>
                        <div class ='submit-container'>
                            <button type='button' class='btn content-btn'>Ok</button>
                        </div>
                </div>
            </div>
        </div>
    </div>
</a>"; 
}else {
    $update_status="INSERT INTO chatroom_user (`chatroom_id`,`user_id`)VALUES ('$chatroomid','$id')";
    $check_status=mysqli_query($connection,$update_status)or die(mysqli_error($connection));

    $count=mysqli_query($connection,"SELECT * from chatroom_user WHERE chatroom_id ='$chatroomid' ")or die(mysqli_error($connection));

    $total_user_in_any_chatroom = mysqli_num_rows($count);

    echo " Total User : ". $total_user_in_any_chatroom. " " ;
}
}else if($check >0){
if($chatroomID == $chatroomid) {
    $count=mysqli_query($connection,"SELECT * from chatroom_user WHERE chatroom_id ='$chatroomid' ")or die(mysqli_error($connection));

    $total_user_in_any_chatroom = mysqli_num_rows($count);

    echo " Total User : ". $total_user_in_any_chatroom. " " ;
}
else if($chatroomID != $chatroomid){
    echo "<script>$(document).ready(function(){ $('#remind-user-chatroom').modal('show'); });</script>
        <a href='chatrooms.php'>
            <div class ='modal fade' id ='remind-user-chatroom' role ='dialog'>
                <div class ='modal-dialog'>
                    <div class ='modal-content'>
                        <div class ='modal-header'>
                            <button type='class' class ='close' data-dismiss ='modal'>&times;</button>
                            <label class ='modal-title'>Reminder</label>
                        </div>
                        <div class ='modal-body'>
                            <span>You haven't leave previous chatroom.Which is ".$chatroomname." Please leave it and re-enter back. Thank You</span>
                                <div class ='submit-container'>
                                    <button type='button' class='btn content-btn'>Leave</button>
                                </div>
                        </div>
                    </div>
                </div>
            </div>
         </a>"; 
}
}

else{
$count=mysqli_query($connection,"SELECT * from chatroom_user WHERE chatroom_id ='$chatroomid' ")or die(mysqli_error($connection));
$total_user_in_any_chatroom = mysqli_num_rows($count);

echo " Total User : ". $total_user_in_any_chatroom. " " ;

}