Can I concatenate multiple MySQL rows into one field?

select hobbies from peoples_hobbies where person_id = 5;

shopping
fishing
coding

shopping, fishing, coding

select person_id, group_concat(hobbies separator ', ')
    from peoples_hobbies group by person_id;

select group_concat(hobbies separator ', ')
  from peoples_hobbies where person_id = 5 group by 'all';

<?php
$array = array('shopping', 'fishing', 'coding'); // filling an array
$comma_separated = implode(",", $array); // imploding the array
echo $comma_separated; // lastname,email,phone
?>

<?php

$array(explode('lastname,email,phone', $str, 2));

?>