Function mystery

[letournp]

I have a form where users select a starttime and endtimes (via a timepicker).

 

I am calling a function using the onchange event to get the time diff between these 2 times,

 

But for some reason the function is not triggered (weel sort off)  the funny thing is that to test,  I just added an allert to the function and that works great but then I add the remainder of the code the function does not trigger.

 

Code that tiggeres corretly is this;

<script>
function thours()
{
		alert("Function triggered");
		
}
</script>

and when I add the rest of my code to the same fucntion like this, it does not trigger.

<script>
function thours()
{
		alert("Function triggered");
		$date1 = <?php echo $_POST['TimeStart'] ?>;
		$date2 = <?php echo $_POST['TimeEnd'] ?>;
		
		if ($date1 != "") && ($date2 != "") {
			
		$diff = $date2->diff($date1);
			
		$hours = $diff->h;
		$hours = $hours + ($diff->days*24);
		
		echo $hours;
		document.getElementsById("Hours").value = $hours;
		}
}
</script>

I dont get it.

 

help

 

thanks

[ginerjm]

That's not how you mix in your vars to the JS function.  You can't use php in a js function since one is client-side and the other is server-side.  Make you js function retrieve the values you want from the dom by using simple js things such as getElementById.  (google it).

 

Ps - Is English not your normal language?  Cause if it is, how are you ever able to spell php functions correctly?

[letournp]

No english is not my normal language!.  I am learning an doing the best I can.

 

thanks

[ginerjm]

In that case - forget my comment.  As for your problem though - do you understand what I posted?

[letournp]

yes I did.   like I said I am a newby and did not know that i could not use php in a function, I also have never used functions before,  learnt something new. thanks

 

I have managed to get the values from the textboxes (used an alert to verify) that worked.

 

now trying to calculate the time diff between time1 and time2 and return that to a hidden field so that I can insert into a table.

[ginerjm]

Why do you need to do this with JS in real time?  Simply have the uses submit the form with the entered times and let php do the work.