adding temperature conversion and functions

techlord001 · techlord001 · commit 99cd6bcad0d8 · 2021-05-05T14:33:44.000+01:00
diff --git a/includes/temperature.php b/includes/temperature.php
@@ -0,0 +1,46 @@
+<?php
+	require_once('units.php');
+	require_once('floatToString.php');
+
+	function convertToCelsius($value, $fromUnit)
+	{
+		switch ($fromUnit) {
+			case 'celsius':
+				return $value;
+				break;
+			case 'fahrenheit':
+				return ($value - 32) / 1.8;
+				break;
+			case 'kelvin':
+				return $value - 273.15;
+				break;
+			default:
+				return "Unsupported unit";
+		}
+	}
+
+	function convertFromCelsius($value, $toUnit)
+	{
+		switch ($toUnit) {
+			case 'celsius':
+				return $value;
+				break;
+			case 'fahrenheit':
+				return ($value * 1.8) + 32;
+				break;
+			case 'kelvin':
+				return $value + 273.15;
+				break;
+			default:
+				return "Unsupported unit";
+		}
+	}
+
+	function convertTemperature($value, $fromUnit, $toUnit)
+	{
+		$celsiusValue = convertToCelsius($value, $fromUnit);
+		$newValue = convertFromCelsius($celsiusValue, $toUnit);
+
+		return $newValue;
+	}
+?>
diff --git a/temperature.php b/temperature.php
@@ -0,0 +1,86 @@
+<?php
+
+  require_once('includes/temperature.php');
+
+  // Default empty variables
+  $fromValue = '';
+  $fromUnit = '';
+  $toUnit = '';
+  $toValue = '';
+
+  /* Check conversion request on submit */
+  if ($_POST['submit']) {
+    $fromValue = $_POST['fromValue'];
+    $fromUnit = $_POST['fromUnit'];
+    $toUnit = $_POST['toUnit'];
+
+    $toValue = convertTemperature($fromValue, $fromUnit, $toUnit);
+  }
+
+	$tempUnits = array(
+		"Celsius",
+		"Fahrenheit",
+		"Kelvin"
+	);
+?>
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <title>Convert Temperature</title>
+    <link href="styles.css" rel="stylesheet" type="text/css">
+  </head>
+  <body>
+
+  <div id="main-content">
+
+    <h1>Convert Temperature</h1>
+
+    <form action="" method="post">
+
+      <div class="entry">
+        <label>From:</label>&nbsp;
+        <input type="text" name="fromValue" value="<?php { echo $fromValue;} ?>" />&nbsp;
+        <select name="fromUnit">
+					<?php
+						foreach ($tempUnits as $unit) {
+							echo "<option value=\"" . strtolower($unit) . "\"";
+							if ($fromUnit == strtolower($unit)) {
+								{
+									echo " selected";
+								}
+							}
+							echo ">" . $unit . "</option>";
+						}
+					?>
+        </select>
+      </div>
+
+      <div class="entry">
+        <label>To:</label>&nbsp;
+        <input type="text" name="toValue" value="<?php { echo $toValue;} ?>" />&nbsp;
+        <select name="toUnit">
+					<?php
+						foreach ($tempUnits as $unit) {
+							echo "<option value=\"" . strtolower($unit) . "\"";
+							if ($toUnit == strtolower($unit)) {
+								{
+									echo " selected";
+								}
+							}
+							echo ">" . $unit . "</option>";
+						}
+					?>
+        </select>
+
+      </div>
+
+      <input type="submit" name="submit" value="Submit" />
+    </form>
+
+    <br/>
+    <a href="index.php">Return to menu</a>
+
+  </div>
+</body>
+</html>
