upload leaveroom file

user/leaveroom.php

+<?php
+	include('session.php');
+	if (isset($_POST['leave'])){
+		$id=$_POST['id'];
+		
+		mysqli_query($conn,"delete from chat_member where userid='".$_SESSION['id']."' and chatroomid='$id'");
+		
+		//remove room if no more member
+		$r=mysqli_query($conn,"select * from chat_member where chatroomid='$id'");
+		if (mysqli_num_rows($r)<1){
+			mysqli_query($conn,"delete from chatroom where chatroomid='$id'");
+		}
+		
+	}
+
+?>
\ No newline at end of file