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I am trying to subtract a submitted time from the total time. For example, user puts in a start time of 09:00 and end time of 17:00 This gives me a total hours of 08:00, which is correct. What I want to do is allow the user to put, for example, 02:30 into a third input and click calculate, which should give a total time of 05:30. Here is the code I have for calculating the difference between both times: <?php if(isset($_POST['start_shift1']) && $_POST['end_shift1'] && $_POST['break1'] != "") { $datetime1 = new DateTime($_POST['start_shift1']); $datetime2 = new DateTime($_POST['end_shift1']); $break = new DateTime($_POST['break1']); $mondiff = $datetime1->diff($datetime2); ?> <input type="text" readonly class="form-control" name="monday" value="<?php echo $mondiff->format('%H:%I'); ?>"> <?php } ?> Does anyone know how I can subtract $break from $mondiff?

Hi, I have two date and time stamps stored in my database, I'm using the below script to calculate the difference but whenever I'm getting an extra 1 hour added ?? Any ideas, Cheers Chris <?php $start = $row_rsComplete['quote_added']; $finish = $row_rsComplete['quote_complete']; $difference = ($finish - $start); $day = round(($difference % 604800) / 86400); $hours = round((($difference % 604800) % 86400) / 3600); $minutes = round(((($difference % 604800) % 86400) % 3600) / 60); echo $day." days"."<br/>"; echo $hours." hours"."<br/>"; echo $minutes." minutes"."<br/>"; ?>

Here is my countdown counter code. It works. But I would like to show multiple of these countdown counters with different dates, on a single page. I tried duplicating them and giving them different "due" id name but I the result I get is like this "NaNd NaNh NaNm NaNs". What's the proper way to duplicate the code below and give them different dates? <div id="due"></div> <script> // Set the date we're counting down to var countDownDate = new Date("2017-05-05 19:01:58c").getTime(); // Update the count down every 1 second var x = setInterval(function() { // Get todays date and time var now = new Date().getTime(); // Find the distance between now an the count down date var distance = countDownDate - now; // Time calculations for days, hours, minutes and seconds var days = Math.floor(distance / (1000 * 60 * 60 * 24)); var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)); var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60)); var seconds = Math.floor((distance % (1000 * 60)) / 1000); // Display the result in the element with id="due" document.getElementById("due").innerHTML = days + "d " + hours + "h " + minutes + "m " + seconds + "s "; // If the count down is finished, write some text if (distance < 0) { clearInterval(x); document.getElementById("due").innerHTML = "OVERDUE"; } }, 1000); </script>