BMI-calculator example

BMI-calculator example HTML-form BMI-calculator example

BMI-calculator example

Height in meters
Weight in kilograms

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BMI-calculator example

"; print "try again"; //Execution of this script is terminated at this point. exit; } //Read user value to variable. $height=$_POST['height']; //Check that value is in right range. if ($height<0 || $height>2.5) { print "Height must be value between 0 and 2.5"; print "try again"; exit; } //Weight is in kilogramms, so it must be an integer (no floating point). if ($_POST['weight']!=strval(intval($_POST['weight']))) { print "Weight is invalid"; print "try again"; exit; } //Read user value to variable. $weight=$_POST['weight']; //Check that value is in right range. if ($weight<0 || $weight>500) { print "Weight must be value between 0 and 500"; print "try again"; exit; } //Calculate BMI. $bmi=$weight / ($height * $height); //Print result. print("Body mass index is $bmi"); ?> Back to examples Back to examples

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