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void var_dump ( mixed $expression [, mixed $... ] )

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

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

<?php
$b = 3.1;
$c = true;
var_dump($b, $c);
?>

float(3.1)
bool(true)