php - How to echo alternatively 2 values on every refresh? -

php - How to echo alternatively 2 values on every refresh? -

i'm writing php code , have 2 variables $var1 , $var2. want method helps me display alternatively on every refresh 1 of 2 values.

for example:

on first load of page must display: echo $var1

on first refresh of page must display: echo $var2

on sec refresh of page must display: echo $var1

on 3rd refresh of page must display: echo $var2

etc...

for illustration can utilize sessions.

<?php session_start(); $a = 1; $b = 2; if(!isset($_session['variable'])){ $_session['variable'] = true; } if($_session['variable']){ echo $a; }else{ echo $b; } $_session['variable'] = !$_session['variable']; ?>

php variables echo