Membuka newtab dengan dibatasi waktu dan kembali ke halaman asal

Javascript dibawah ini untuk membuka newtab dengan batasan waktu,

yang ingin ditanyakan adalah :

Apa isi file.php yang berada pada javascript dibawah ini :

<script language=javascript>

var mywindow;
var mysite1=0;
var starttime=0;
var endtime=0;
var sectime=1;
var timerseconds=0;
var mysiteT=0;
var nowplaying=0;
var waitingseconds=39;

function SurfPlayVideo()
{mywindow=window.open('https://href.li?https://youtube.com/watch?v=Ene_B5bb-WA');
$("#Hint").html('<img src="image/image.gif">');
$.ajax({type:"GET",
url:"gettime.php",    //gettime.php
success:function(msg)
{starttime=msg;
mysite1='116989';
mysiteT='25824885';
timerseconds=waitingseconds;
nowplaying=1;

document.getElementById("Hint").style.display='block';
setTimeout("DisplayTimer();",1000);
setTimeout("OkAddCoinsWell2();",1000*waitingseconds);}});}

function DisplayTimer()
{if(nowplaying==1){timerseconds=timerseconds-1;
$("#Hint").html('<font size="3"><h1>You will earn points in '+timerseconds+' Seconds.</h1></font>');
setTimeout("DisplayTimer();",1000);}}

function OkAddCoinsWell2()
{nowplaying=0;$("#Hint").html('<img src="image/image.gif">');
if(mywindow.closed){alert('You had closed popup window !');
window.location='http://localhost/ba';}
else
{$.ajax({type:"POST",
url:"ytreceive.php",                                             //ytreceive.php
data:"data="+mysite1+"---"+'25990702'+"---"+mysiteT,cache:false,
success:function()
{$("#Hint").html('<font size="3"><h1>Points added to your balance!</h1></font>');
mywindow.close();

document.getElementById('Mybalancenow').contentWindow.location.reload(true);
setTimeout("RefreshMe();",1000);}});}}

function SkipThisPage(mysiteid)
{document.getElementById("Hint").style.display='block';
$("#Hint").html('<img src="image/image.gif">');
$.ajax({type:"POST",
url:"ytskip.php",   //ytskip.php
data:"id="+mysiteid,
cache:false,
success:function(){$("#Hint").html('<font size="4" color="blue">Skipped!</font>');
RefreshMe();

removeElement('tbl',mysiteid);}});}

function RefreshMe()
{window.location='index.php';}

</script>

Apa isi pada file.php dibawah ini ?

1- gettime.php

2- ytreceive.php

3- ytskip.php