如何在php中打印数组输出？

$arr = array('apple', 'banana', 'orange');
var_dump($arr);

array(3) {
  [0]=>
  string(5) "apple"
  [1]=>
  string(6) "banana"
  [2]=>
  string(6) "orange"
}

$arr = array('apple', 'banana', 'orange');
print_r($arr);

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

$arr = array('apple', 'banana', 'orange');
foreach ($arr as $value) {
    echo $value . '<br>';
}

apple
banana
orange