php - Creating a zone related clock -


i have working clock local server , browser (local system). both works great. want find time offset between clocks, based on seconds, , add local system clock.

for example: system clock is: 10:00:00 , server clock 12:15:00 @ same date. offset be: 02:15:00 (of course in seconds example wrote way). , add (browser)local time show server time. 12:15:00.

this i'm doing here:

var interval = self.setinterval(function(){   clock(); },1000);  function clock() {        //get local server time     <?php $today = getdate(); ?>;     var ser = <?php echo $today[0]; ?>;      //local client time     var seconds = date.now();     var offset = seconds-ser*1000;     parseint(offset/1000);      var d = new date();     d.settime(date.now()-offset);     var h = d.gethours();     var m = d.getminutes();     var s = d.getseconds();      if(s < 10)       s = "0" + s;     if(m < 10)       m = "0" + m;     if(h < 10)       h = "0" + h;      var tm = h+":"+m+":"+s;     document.getelementbyid("clock").value = tm; }

but put variable 

offset

in line: d.settime(date.now()-offset);

the clock doesn't updates anymore. guess there issue php compatibility. idea how solve it?

the offset calculation has outside of repeadly called function:

//get local server time <?php $today = getdate(); ?>; var ser = <?php echo $today[0]; ?>;  //local client time var seconds = date.now(); var offset = seconds-ser*1000; parseint(offset/1000); // way: returnval of parseint isn't stored anywhere, line nothing  var interval = self.setinterval(function(){   clock(); },1000);  function clock() {         var d = new date();     d.settime(date.now()-offset);     var h = d.gethours();     var m = d.getminutes();     var s = d.getseconds();      if(s < 10)       s = "0" + s;     if(m < 10)       m = "0" + m;     if(h < 10)       h = "0" + h;      var tm = h+":"+m+":"+s;     document.getelementbyid("clock").value = tm; }

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