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<?php
$msg = "";
$result = "";
$type = "";
if(!empty($_GET['height']) && !empty($_GET['weight'])){
$height = (float) ($_GET['height'] / 100);
$weight = (float) $_GET['weight'];
$result = number_format($weight / ($height*$height), 2, '.', '');
}
if($result != 0){
if($result < 16){
$type = 'Severe thinnes';
}else if($result >= 16 && $result < 17){
$type = 'Moderate thinnes';
}else if($result >= 17 && $result < 18.5){
$type = 'Mild thinnes';
}else if($result >= 18.5 and $result < 25){
$type = 'Normal';
}else if($result >= 25 && $result < 30){
$type = 'Overweight';
}else if($result >= 30 && $result < 35){
$type = 'Obese Class I';
}else if($result >= 35 && $result < 40){
$type = 'Obesse Class II';
}else{
$type = 'Obese Class III';
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<title>Body Mass Index</title>
</head>
<body>
<form id="login-form" method="GET">
<div class="mb-1">
<h2><?=$msg?></h2>
</div>
<div class="mb-1">
<label class="form-label" for="height">Height</label>
<input class="form-control" type="text" name="height" id="pass" placeholder="Enter your height" required>
</div>
<div class="mb-1">
<label class="form-label" for="weight">Weight</label>
<input class="form-control" type="text" name="weight" id="pass" placeholder="Enter your weight" required>
</div>
<div class="mb-1">
<input class="form-control" type="submit" value="Calculate">
</div>
<div class="mb-1">
<h2><?=$result?></h2>
<h2><?=$type?></h2>
</div>
</form>
</body>
</html>