Calculating time Difference with Submission Pre-Parser

[ramonbps]

So i been trying to get this going calculating time difference of my for form.

Below is my code.

if (isset($_POST["checkin"]) && $_POST["checkout"]) {
$tcheckin = $_post['checkin']; $tcheckout = $_post['checkout'];
 $tdiff = date_diff("$tcheckin","$tcheckout")->format("%H:%I:%S");
$_POST["inandout"]=["$tdiff"];
exit;

I am not sure what i am doing wrong.

[ramonbps]

So i been trying to get this going calculating time difference of my for form.

Below is my code.

if (isset($_POST["checkin"]) && $_POST["checkout"]) {
$tcheckin = $_post['checkin']; $tcheckout = $_post['checkout'];
 $tdiff = date_diff("$tcheckin","$tcheckout")->format("%H:%I:%S");
$_POST["inandout"]=["$tdiff"];
exit;

I am not sure what i am doing wrong.

 this is my actually code

PHP Code:

$tcheckin=$_POST["checkin"];
$tcheckout=$_POST["checkout"];
$tdiff = date_diff($tcheckin,$tcheckout)->format("%H:%I:%S");
$_POST["inandout"]=["$tdiff"];

When i remove ->format("%H:%i:%s") the blank page goes away. 


Attach is the blank page i get.

[nelsondcosta]

Im trying something like that... but I fail like the new Death Note movie :S

[ramonbps]

What have you tried maybe we can, come with a solution.

[ramonbps]

So i got it working, this is what i did below. I hope this helps!.

PHP Code:

// Set Time Zone
date_default_timezone_set('America/Los_Angeles');
//Get Checkin
$tcheckin = $_POST["checkin"];
//Get Checkout
$tcheckout = $_POST["checkout"];
//Create Time Variable from checkin
$dteStart = new DateTime($tcheckin);
//Create Time Variable from checkout
$dteEnd   = new DateTime($tcheckout);
// Calculate Time Difference
$dteDiff  = $dteStart->diff($dteEnd);
//Format Time
$ttdiff = $dteDiff->format("%H:%I");
//Insert Time Differance to Total
$_POST["inandout"]=["$ttdiff"];