How to increment username in php/mysql

[waqas87]

hi ..

i am working on chat system ..there are two types of user one are register and other are guest and i have to add guest user..in to database as temporary so they can chat with each other the problem i am facing is with there names i want name like this (Guest1,Guest2,Guest3,Guest4,...so on..)..i am trying but it is not working on live server .. i have tested it on my local server using xampp server.. it worked but not on live server...

 

here is the code which i am using

 

 

   if(isset($_SESSION['Guest']))

      {
   
      $_SESSION['Guest']=$_SESSION['Guest']+1;

      }

      else

      {

      $_SESSION['Guest']=1;

 

 

and one more thing how i can delete Guest users who are not online..

[matto]

I think you mis-understand how sessions work. Every new visitor to this script has the session variable $_SESSION['Guest'] set to 1 and $_SESSION['Guest'] is only incremented when the script is executed by someone who has already visited the page

 

<?php
session_start();
if(isset($_SESSION['Guest']))
{
  //This code is only executed by the already visited guest
  $_SESSION['Guest']=$_SESSION['Guest']+1;
  echo "\$_SESSION['Guest'] now equals: " . $_SESSION['Guest'];
}
else
{
  //every new visitor gets the $_SESSION['Guest'] = 1
  $_SESSION['Guest']=1;
} 
?>

 

It would be better to keep track of the number of guests using a database...