How to set 'default' keys and values for array passed as parameter in PHP?

Asked

Viewed 71 times

3

I did a function that takes several arguments, and I decided to pass them by a array to be executed. Ex:

public function funcTeste(array $dados){
    return \count($dados);
}

But this array must have a default number of keys (as if I said $dados = ['key1', 'key2', 'key3'], or something like).

More than that, if this array has parameters not passed (as if the user passes as parameter ['key1' => 'cavalo', 'key2' => 'avestruz']) there is a way in the function to fill this value with a default?

I am using PHP 7.1.23

php php-7

  • If you need it to be a set value with default values, why did you use the array and did not define the arguments separately?

  • I thought it would be easier to pass the parameters, especially in functions with n required parameters, where, if changing the order of two of them, breaks the entire calculation

  • I’m not sure if there’s what I’m looking for, but if there is, it’ll be a hand on the wheel

  • 2

    You will have to make the conditions within the function to ensure what you need.

1 answer

3


Use array_fill_key() to generate an array with all the required keys and only one value for all. Finally call array_merge() which will merge the default array and the user passed array and the rightmost array (last) will override the values with equal keys.

$padrao =  array_fill_keys(['k1', 'k2', 'k3'], 'valor padrão');
$arr = ['k1' => 'v1', 'k3' => 'v3'];

$novo = array_merge($padrao, $arr);

Exit:

Array
(
    [k1] => v1
    [k2] => valor padrão
    [k3] => v3
)

  • It worked, I combined the array_merge with an array I have now created in the constructor to define the various different values for the array.

Browser other questions tagged php php-7

You are not signed in. Login or sign up in order to post.