How to Add Seconds, Minutes, Hours, Days, Months and Years to a Date in PHP

Submitted by nurhodelta_17 on Monday, August 28, 2017 - 14:47.

In this tutorial, I'm going to show you how to add number of seconds, minutes, hours, days, months or years using PHP. This tutorial will not give you a good design but will give you idea on the topic. Also, If you wanted to convert our output date, you may do so by visiting my previous tutorial about Converting Date Formats. Creating Form and Output Date We determine our output date by user input upon submission. We name this form as "index.php".

<!DOCTYPE html>
<html>
<head>
<title>How to Add Seconds, Minutes, Hours, Days, Months and Years to a Date and Time in PHP</title>
<body>
        <h2>Our Date and Time: 2017-08-28 13:05:05</h2>
        <?php
                $olddate="2017-08-28 13:05:05";
                $newdate="";
        ?>
        <form method="POST">
                <input type="text" name="number">
                <select name="what">
                        <option value="seconds">Seconds</option>
                        <option value="minutes">Minutes</option>
                        <option value="hours">Hours</option>
                        <option value="days">Days</option>
                        <option value="months">Months</option>
                        <option value="years">Years</option>
                </select>
                <input type="submit" name="add" value="Add">
        </form>
        <?php
                if (isset($_POST['add'])){
                        
                        $number=$_POST['number'];
                        $what=$_POST['what'];
                        
                        echo "<br> You have added ".$number." ".$what.".";
                        $newdate=date('Y-m-d H:i:s', strtotime("+$number $what", strtotime($olddate)));
                        
                }
        
        ?>
        <h2>New Date and Time: <?php echo $newdate; ?> </h2>
</body>
</head>
</html>

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