Currency Converter App Using PHP Source Code

Submitted by razormist on Tuesday, February 18, 2020 - 08:59.
In this tutorial we will create a Currency Converter App using PHP. This code will convert the current money to different country when user submit the form value The code use a PHP POST to call a specific method that send the value and convert it to the currency options by calculating with special formulas. 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 webserver including xamp, wamp, etc. It is being use to any famous websites and it has a modern technology that can easily be use by the next generation.

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. 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 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. 		<link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
  5. 		<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
  6. 	</head>
  7. <body>
  8. 	<nav class="navbar navbar-default">
  9. 		<div class="container-fluid">
  10. 			<a class="navbar-brand" href="https://sourcecodester.com">Sourcecodster</a>
  11. 		</div>
  12. 	</nav>
  13. 	<div class="col-md-3"></div>
  14. 	<div class="col-md-6 well">
  15. 		<h3 class="text-primary">Currency Converter App Using PHP Source Code</h3>
  16. 		<hr style="border-top:1px dotted #ccc;"/>
  17. 		<div class="col-md-6 alert alert-danger">
  18. 			<form method="POST" action="">
  19. 				<div class="form-inline">
  20. 					<select name="val" class="form-control">
  21. 						<option value="PHP">PHP</option>
  22. 						<option value="USD">USD</option>
  23. 					</select>
  24. 					<input class="form-control" type="number" name="digit"/>
  25. 				</div>	
  26. 				<br />
  27. 				<div class="form-inline">
  28. 					<label>Select Currency: </label>
  29. 					<select name="currency" required="required" class="form-control">
  30. 						<option value="">Select an option</option>
  31. 						<option value="USD">USD</option>
  32. 						<option value="Euro">Euro</option>
  33. 						<option value="PHP">PHP</option>
  34. 						<option value="Japanese Yen">Japanese Yen</option>
  35. 						<option value="Pound">Pound</option>
  36. 					</select>
  37. 					<br /><br />
  38. 					<center><button type="submit" name="convert" class="btn btn-primary form-control" style="width:30%;">Convert</button></center>
  39. 					<br />
  40. 				</div>	
  41. 					<?php require 'convert.php'?>
  42. 			</form>
  43. 		</div>
  44. 	</div>
  45. </body>
  46. </html>

Creating the Main Function

This code contains the main function of the application. This code will convert the value 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 convert.php 
  1. <?php
  2. 	if(ISSET($_POST['convert'])){
  3. 		$val = $_POST['val'];
  4. 		$digit = $_POST['digit'];
  5. 		$currency = $_POST['currency'];
  6.  
  7.  
  8. 		if($val=="PHP" && $currency=="USD"){
  9. 			$output = $digit * 51.52;
  10. 			echo"<center><label class='text-success' style='font-size:25px;'>$".$output."</label></center>";
  11. 		}else if($val=="PHP" && $currency=="Euro"){
  12. 			$output = $digit * 63.62;
  13. 			echo"<center><label class='text-success' style='font-size:25px;'>&#8364;".$output."</label></center>";
  14. 		}else if($val=="PHP" && $currency=="PHP"){
  15. 			$output = $digit;
  16. 			echo"<center><label class='text-success' style='font-size:25px;'>&#8369;".$output."</label></center>";
  17. 		}else if($val=="PHP" && $currency=="Japanese Yen"){
  18. 			$output = $digit * 0.47;
  19. 			echo"<center><label class='text-success' style='font-size:25px;'>&#165;".$output."</label></center>";
  20. 		}else if($val=="PHP" && $currency=="Pound"){
  21. 			$output = $digit * 65.83;
  22. 			echo"<center><label class='text-success' style='font-size:25px;'>&#163;".$output."</label></center>";
  23. 		}else if($val=="USD" && $currency=="USD"){
  24. 			$output = $digit;
  25. 			echo"<center><label class='text-success' style='font-size:25px;'>$".$output."</label></center>";
  26. 		}else if($val=="USD" && $currency=="Euro"){
  27. 			$output = $digit*0.89;
  28. 			echo"<center><label class='text-success' style='font-size:25px;'>&#8364;".$output."</label></center>";
  29. 		}else if($val=="USD" && $currency=="PHP"){
  30. 			$output = $digit/51.52;
  31. 			echo"<center><label class='text-success' style='font-size:25px;'>&#8369;".$output."</label></center>";
  32. 		}else if($val=="USD" && $currency=="Japanese Yen"){
  33. 			$output = $digit*107.72;
  34. 			echo"<center><label class='text-success' style='font-size:25px;'>&#165;".$output."</label></center>";
  35. 		}else if($val=="USD" && $currency=="Pound"){
  36. 			$output = $digit*1.30;
  37. 			echo"<center><label class='text-success' style='font-size:25px;'>&#163;".$output."</label></center>";
  38. 		}
  39. 	}
  40. ?>
There you have it we successfully created Currency Converter App 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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