PHP - Calculate Days in a Month

Submitted by razormist on Sunday, January 6, 2019 - 23:27.
In this tutorial we will create a Calculate Days in a Month using PHP. Using PHP, you can let your user directly interact with the script and easily to learned its syntax. jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML. It is designed to make it easier to navigate a document, via classes and id's attribute. So let's now do the coding...

Getting started:

First you have to download & install XAMPP or any local server that run PHP scripts. Here's the link for XAMPP server https://www.apachefriends.org/index.html. Lastly, 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 simply copy and write it into your text editor, then save it as index.php. 
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. 	<head>
  4. 		<meta charset="UTF-8" name="viewport" content="withd=device-width, initial-scale=1"/>
  5. 		<link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
  6. 	</head>
  7. <body>
  8. 	<nav class="navbar navbar-default">
  9. 		<div class="container-fluid">
  10. 			<a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
  11. 		</div>
  12. 	</nav>
  13. 	<div class="col-md-3"></div>
  14. 	<div class="col-md-6 well">
  15. 		<h3 class="text-primary">PHP - Calculate Days in a Month</h3>
  16. 		<hr style="border-top:1px dotted;"/>
  17. 		<div class="col-md-2"></div>
  18. 		<div class="col-md-8">
  19. 			<?php include 'calculate.php'?>
  20. 		</div>
  21. 	</div>
  22. </body>
  23. </html>

Creating Main Function

This code contains the main function of the application. This code will automatically calculate the days of the month when you click the button. To do that just copy and write this block of codes inside the text editor, then save it as calculate.php. 
  1. <div class="form-inline">
  2. 	<form method="POST" action="">	
  3. 		<label>Month</label>
  4. 		<select class="form-control" name="month" required="required">
  5. 			<option value="">Select month</option>
  6. 			<?php
  7. 				$months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
  8. 				for($i = 1; $i<=12; $i++){
  9. 					echo "<option value='".$i."'>".$months[$i - 1]."</option>";
  10. 				}
  11. 			?>
  12. 		</select>
  13. 		<label>Year</label>
  14. 		<select class="form-control" name="year" required="required">
  15. 			<option value="">Select year</option>
  16. 			<?php
  17. 				$year = date("Y", strtotime("+8 HOURS"));
  18. 				for($y = $year; $y>=1965; $y--){
  19. 					echo "<option value='".$y."'>".$y."</option>";
  20. 				}
  21. 			?>
  22. 		</select>
  23. 		<br /><br />
  24. 		<center><button name="calculate" class="btn btn-primary">Calculate</button></center>
  25. 	</form>
  26. </div>
  27.  
  28. <?php
  29. 	if(ISSET($_POST['calculate'])){
  30. 		$month = $_POST['month'];
  31. 		$year = $_POST['year'];
  32.  
  33. 		$calculate = cal_days_in_month(CAL_GREGORIAN,$month,$year);
  34. 		echo "<center><h2>There are <label style='color:red;'>".$calculate."</label> days in ".$months[$month - 1]." ".$year."<h2></center>";
  35. 	}
  36. ?>
There you have it we successfully created Calculate Days in a Month 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!

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