When loading execute both operations together.
updateChatAJAx();
updateChatAJAx1();
Then setInterval for both actions
var flag=0;
$(function(){
setInterval(function () {
if(flag==0)
{
updateChatAJAx();
}
else
{
updateChatAJAx1();
}
}, 2000);
});
Change the flag to choose operation.
flag=0 -> updateChatAJAx();
and
flag=1 -> updateChatAJAx1();
solved two set interval function in single PHP file is not working