join array values and with a hyphen in php

Question

i have array like this :

$year = Array(
     [0] => 2019
     [1] => 2020
    );

i want to join this two array and the array values separ

Answer 1

Everything is already invented:

echo implode('-', $split);

Answer 2

Use implode:

$array = array(
    0 => 2019, 1 => 2020
);

$string = implode('-',$array);
echo $string;