Problem with array in PHP

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Problem with array in PHP

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#1 by (2 votes)

1

I have a problem using array.
I am trying to add the average score of 'persona1'+'persona2' and divide the result by the number of people so that I can print the average number of notes between these two people. But, the result is not what I expect since it shows me the average of 'persona1' and then the average between 'persona1'+'persona2' .

$persona1 = [
   'nombre' => 'nombre1',
   'edad' => 25,
   'notas' => [1,2,3,4]
];

$persona2 = [
   'nombre' => 'nombre2',
   'edad' => 21,
   'notas' => [5,6,7,8]
];

$persona3 = [
   'nombre' => 'nombre3',
   'edad' => 32,
   'notas' => [5,1,3,4]
];

$datos=[$persona1, $persona2, $persona3];


$suma = 0;

foreach($datos as $persona){

    if($persona['edad'] < 29){

        $media = array_sum($persona['notas'])/count($persona['notas']);

        $suma = $suma + $media;

        echo $suma . " ";

    }
}

// El resultado que me muestra es : 2.5 9 
// El resultado que necesito es : 9
// No entiendo por que me muestra ese 2.5, el 2.5 entiendo que es la suma de las notas de persona1 divida entre el numero de notas.

php array

asked by InThaHouse 30.11.2018 в 20:35

source

1 answer

Receive value from an input and display it without updating the page Collect several exceptions from a try / catch in Java

score 2 · Accepted Answer

Your logic is correct, at the end the variable saves the value of 9 which is what you need but you are printing it in the first iteration so it shows you

2.5 9

which is the result in each iteration, just print the variable $suma out of the foreach and it will show you the correct result:

$persona1 = [
   'nombre' => 'nombre1',
   'edad' => 25,
   'notas' => [1,2,3,4]
];

$persona2 = [
   'nombre' => 'nombre2',
   'edad' => 21,
   'notas' => [5,6,7,8]
];

$persona3 = [
   'nombre' => 'nombre3',
   'edad' => 32,
   'notas' => [5,1,3,4]
];

$datos=[$persona1, $persona2, $persona3];


$suma = 0;

foreach($datos as $persona){

    if($persona['edad'] < 29){

        $media = array_sum($persona['notas'])/count($persona['notas']);

        $suma = $suma + $media;

        //echo $suma . " ";

    }
}
//Imprimes luego de que realizas todas las iteraciones
echo($suma);//Imprime 9