calling php function error from another file

Question

I'm trying to call a function getBMR() which is in another file (user.php) with the following code and I'm getting an error:

Using $this when not in object context )..

variables are set in the process.php file that I am calling the function in

$a =$_POST["example"];

Here is the code

echo $this->getBMR($a,$b,$c,$d,$e,$f);

Thanks, any help would be great.

class user {

public function getBMR()
{
    switch ($this->gender){
                case 'Female':
                    $gender= 655 + (9.6 * $userWeight ) + (1.8 * $userHeight) - (4.7 * $userAge);
                    echo "<p>Your estimated daily metabolic rate is $gender </p>";
                    echo "<p>This means that you need rouhgly $gender calories a day to maintain your current weight.</p>";

                    break;
                    case 'Male':
                        $gender=66 + (13.7 *$userWeight) + (5 * $heuserHeightight) - (6.8 * $userAge);
                        echo "<p>Your estimated daily metabolic rate is $gender </p>";
                        echo "<p>This means that you need rouhgly $gender calories a day to maintain your current weight.</p>";

            }

}

can you show us the class which defines method getBMR(), the way you instantiate it (e.g. $obj = new someClass();) and how you're trying to use method getMBR() — jibsteroos
– jibsteroos, Commented Dec 7, 2019 at 21:21

Máčaj Jakub · Accepted Answer · 2019-12-07 21:00:28Z

1

I suspect this code is not part of class method. Try this

require_once("user.php");
$a =$_POST["example"];
// rest of code
echo getBMR($a,$b,$c,$d,$e,$f);

you are not allowed to use "$this" since you are not in an object context which means you are not using "$this" within class method

Note that if "user.php" file is not in same directory as process.php you need to include relative/absolute path up to directory in which user.php file is such as:

require_once('../path/to/users/user.php');

Taken from https://www.php.net/manual/en/language.oop5.basic.php

The pseudo-variable $this is available when a method is called from within an object context. $this is a reference to the calling object

answered Dec 7, 2019 at 21:00

Máčaj Jakub

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6 Comments

user11464125 Over a year ago

Tried require_once it didnt work.. i have include at the moment and still nothing

Máčaj Jakub Over a year ago

Are you still getting any errors in your code? If so, write them down please. Also did you remove $this-> from the method call? Check logs for any additional errors please.

user11464125 Over a year ago

Call to undefined function getBMR() is theerror im getting

user11464125 Over a year ago

I have removed $this-> from mehod file too

Máčaj Jakub Over a year ago

Can you include user.php file into the original question? We need to see the method definition

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