Back
Mean, and Median

Insert a group of numbers to find the mean and median of them.

CODE FOLLOWS

<?php

include('includes/header.php');

// code
error_reporting(E_ALL);    // set error reporting to all

echo('<h1>Mean, and Median</h1>');
echo('<h2>Insert a group of numbers to find the mean and median of them.</h2>');

// Note the variables being passed via the GET ternary operators.

$step = $_GET['step'] ?? 0;
$number1 = $_GET['number1'] ?? '';
$number2 = $_GET['number2'] ?? '';
$number3 = $_GET['number3'] ?? '';
$number4 = $_GET['number4'] ?? '';
$number5 = $_GET['number5'] ?? '';

// filter all input taken from the Browser

$step = htmlentities($step);
$number1 = htmlentities($number1);
$number2 = htmlentities($number2);
$number3 = htmlentities($number3);
$number4 = htmlentities($number4);
$number5 = htmlentities($number5);

if ($step == 0)    // first time into this form
{
    ?>

    <form action="mean-median.php" method="GET" class="pad">
        <label for="number1">Number1</label>
        <input type="text" size="36" id="number1" name="number1" value="">
        <br><br>
        <label for="number2">Number2</label>
        <input type="text" size="36" id="number2" name="number2" value="">
        <br><br>
        <label for="number3">Number3</label>
        <input type="text" size="36" id="number3" name="number3" value="">
        <br><br>
        <label for="number4">Number4</label>
        <input type="text" size="36" id="number4" name="number4" value="">
        <br><br>
        <label for="number5">Number5</label>
        <input type="text" size="36" id="number5" name="number5" value="">
        <br><br>
        <input type="hidden" name="step" value="1">
        <input type="submit" name="submit" value="Submit">
    </form>

    <?php
} else  // uses functions to get mean, median and range

{
    function mean($u, $v, $w, $x, $y) {
        $z = $u + $v + $w + $x + $y;
        $mean = $z / 5;
        return $mean;
    }
    function median($a, $b): int
    {
        if ($a == $b) return 0;
        return ($a < $b) ? -1 : 1;
    }

    // Input Array
    $arr = array(
        "a" => $number1,
        "b" => $number2,
        "c" => $number3,
        "d" => $number4,
        "e" => $number5,
    );

    uasort($arr, "median");

    // Print the sorted array

    echo('<h2>Mean:</h2>');
    echo "The mean is 
    $number1 + $number2 + $number3 + $number4 + $number5 = " .
        mean($number1 , $number2 , $number3 , $number4 , $number5  ) . "<br>";

    echo('<h2>Median:</h2>');
    print_r($arr);
}
    // provide a form to try again

if (!$step == 0){
    ?>

    <form action="mean-median.php" method="GET">
        <input type="hidden" name="step" value="0">
        <input type="submit" name="submit" value="Try Again">
    </form>

    <?php
}
include('includes/footer.php');
?>
Back