simohammedhttp/bmi_calculator.php

## bmi_calculator.php
<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $weight = $_POST['weight'];
    $height = $_POST['height'];

    // Validate inputs
    $errors = [];
    if (empty($weight)) {
        $errors[] = 'Weight is required';
    }
    if (empty($height)) {
        $errors[] = 'Height is required';
    }

    // Calculate BMI if inputs are valid
    if (empty($errors)) {
        $bmi = calculateBMI($weight, $height);
        $category = getBMICategory($bmi);

        // Display the result
        echo "Your BMI is: " . $bmi . "<br>";
        echo "Category: " . $category;
    } else {
        // Display validation errors
        foreach ($errors as $error) {
            echo $error . "<br>";
        }
    }
}

function calculateBMI($weight, $height)
{
    // Calculate BMI
    $bmi = $weight / ($height * $height);
    return round($bmi, 2);
}

function getBMICategory($bmi)
{
    // Define BMI categories and their ranges
    $categories = array(
        'Underweight' => array('min' => 0, 'max' => 18.4),
        'Normal weight' => array('min' => 18.5, 'max' => 24.9),
        'Overweight' => array('min' => 25, 'max' => 29.9),
        'Obesity' => array('min' => 30, 'max' => PHP_FLOAT_MAX)
    );

    // Determine the category based on the BMI value
    foreach ($categories as $category => $range) {
        if ($bmi >= $range['min'] && $bmi <= $range['max']) {
            return $category;
        }
    }

    return 'Unknown';
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>BMI Calculator</title>
</head>
<body>
    <h1>BMI Calculator</h1>
    <form method="POST" action="">
        <label for="weight">Weight (kg):</label>
        <input type="text" name="weight" id="weight" />
        <br/>
        <label for="height">Height (m):</label>
        <input type="text" name="height" id="height" />
        <br/>
        <input type="submit" value="Calculate BMI" />
    </form>
</body>
</html>
	<?php
	if ($_SERVER['REQUEST_METHOD'] === 'POST') {
	$weight = $_POST['weight'];
	$height = $_POST['height'];

	// Validate inputs
	$errors = [];
	if (empty($weight)) {
	$errors[] = 'Weight is required';
	}
	if (empty($height)) {
	$errors[] = 'Height is required';
	}

	// Calculate BMI if inputs are valid
	if (empty($errors)) {
	$bmi = calculateBMI($weight, $height);
	$category = getBMICategory($bmi);

	// Display the result
	echo "Your BMI is: " . $bmi . "<br>";
	echo "Category: " . $category;
	} else {
	// Display validation errors
	foreach ($errors as $error) {
	echo $error . "<br>";
	}
	}
	}

	function calculateBMI($weight, $height)
	{
	// Calculate BMI
	$bmi = $weight / ($height * $height);
	return round($bmi, 2);
	}

	function getBMICategory($bmi)
	{
	// Define BMI categories and their ranges
	$categories = array(
	'Underweight' => array('min' => 0, 'max' => 18.4),
	'Normal weight' => array('min' => 18.5, 'max' => 24.9),
	'Overweight' => array('min' => 25, 'max' => 29.9),
	'Obesity' => array('min' => 30, 'max' => PHP_FLOAT_MAX)
	);

	// Determine the category based on the BMI value
	foreach ($categories as $category => $range) {
	if ($bmi >= $range['min'] && $bmi <= $range['max']) {
	return $category;
	}
	}

	return 'Unknown';
	}
	?>

	<!DOCTYPE html>
	<html>
	<head>
	<title>BMI Calculator</title>
	</head>
	<body>
	<h1>BMI Calculator</h1>
	<form method="POST" action="">
	<label for="weight">Weight (kg):</label>
	<input type="text" name="weight" id="weight" />
	<br/>
	<label for="height">Height (m):</label>
	<input type="text" name="height" id="height" />
	<br/>
	<input type="submit" value="Calculate BMI" />
	</form>
	</body>
	</html>