var_dump print_r

<?php
$a = array(1, 2, array("a", "b", "c"));
var_dump($a);

print_r($a);
?>

 

array(3) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  array(3) {
    [0]=>
    string(1) "a"
    [1]=>
    string(1) "b"
    [2]=>
    string(1) "c"
  }
}