Convert Gregorian Date To Julian Day in PHP

Updated on: August 3, 2021

In this tutorial, we will create a Convert Gregorian Date To Julian Day using PHP. This code will automatically calculate the total Julian day when the user inputted a regular date entry. The system uses the PHP POST method to launch a function that converts the given Gregorian date into Julian days using gregoriantojd() by adding time as an argument. This is a user-friendly kind of program feel free to modify it.

We will be using PHP as a scripting language and interpreter that is used primarily on any web server, including xamp, wamp, etc. It is being used to any popular websites, and it has a modern technology that can easily be used by the next generation.

Getting Started:

First, you have to download & install XAMPP or any local server that runs PHP scripts. Here’s the link for the XAMPP server https://www.apachefriends.org/index.html.

And, this is the link for the bootstrap that I used for the layout design https://getbootstrap.com/.

Creating The Interface

This is where we will create a simple form for our application. To create the forms, copy and write it into your text editor, then save it as index.php.

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1" />
        <link rel="stylesheet" type="text/css" href="css/bootstrap.css" />
    </head>
<body>
    <nav class="navbar navbar-default">
        <div class="container-fluid">
            <a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
        </div>
    </nav>
 
    <div class="col-md-3"></div>
    <div class="col-md-6 well">
        <h3 class="text-primary">PHP - Convert Gregorian  Date To Julian Day</h3>
        <hr style="border-top:1px dotted #ccc;"/>
        <div class="col-md-3"></div>
        <div class="col-md-6">
            <form method="POST" action="">
                <div class="form-group">
                    <label>Enter a date</label>
                    <input type="date" name="date" class="form-control" required="required"/>
                </div>
                    <center><button class="btn btn-primary" name="convert">Convert</button></center>
            </form>
            <?php include'converter.php'?>
        </div>
    </div>
</body>	
</html>

Creating the Main Function

This code contains the main function of the application. This code will convert a date into a julian day when the button is clicked. To make this just copy and write these block of codes below inside the text editor, then save it as converter.php

<?php 		
    date_default_timezone_set("Etc/GMT-8");
    if(ISSET($_POST['convert'])){
        $month=date("n", strtotime($_POST['date']));
        $day=date("d", strtotime($_POST['date']));
        $year=date("Y", strtotime($_POST['date']));
 
        $julian = gregoriantojd($month, $day, $year); 
 
        echo "<center><h2>The Julian Day is <span class='text-success'>".$julian."</span></h2></center>";
    }
?>

There you have it we successfully created Convert Gregorian Date To Julian Day using PHP. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!