BMR

PHP class to calculate a persons "Basal Metabolic Rate". Supports both imperial and metric measurements.

Usage:

include class

include_once "BMR.php";

Define Options

$options = [
	'height'=>'5,7',
	'weight_lbs'=>160,
	'age'=>28,
	'gender'=>'m'
];

Get the BMR

$BMR = new BMR($options);
echo $BMR->GetBMR();

Options

height

For CM (Centimeters) pass the value "height"->150

For feet & inches separate by comma "height"=>"5,7" or "height"=>"6,3"

weight

KG (Kilograms): use key "weight" and pass the value "weight"->80

LBS (pounds): use key "weight_lbs" and pass the value "weight_lbs"->176

gender

accepted values (case-insensitive): m male f female

age

pass the value "age"=>28

Setting values manually

you may set the values using the following

height

$BMR->SetHeight(170); or $BMR->SetHeight('5,7');

weight

$BMR->SetWeight(80); or $BMR->SetWeight(160,'lbs');

gender

$BMR->SetGender('male'); or $BMR->SetGender('female');

age

$BMR->SetAge(28);

example using these setters

$BMR = new BMR;
$BMR->SetHeight(170);
$BMR->SetWeight(80);
$BMR->SetGender('male');
$BMR->SetAge(28);
echo $BMR->GetBMR();

calculate function

you may use $BMR->CalculateBMR() to perform the calculation, which will return true or false.

if this returns false you may locate the error mesage with echo $BMR->ErrorMsg

Error Messages

every function except GetBMR() will store an error message if false

error message examples

if (!$BMR->SetHeight('some incorrect value')){
  echo $BMR->ErrorMsg; // returns: Invalid height - out of range
}

if (!$BMR->CalculateBMR()){
  echo $BMR->ErrorMsg; 
}