It displays structured information about one or more expressions .

Example
======

<?php
echo “<pre>”;
$array = array(“php”,”codez”, array(“1”, “1”, “7”),1,2);
var_dump($array);
?>

Output
=====
array(5) {
[0]=>
string(3) “php”
[1]=>
string(5) “codez”
[2]=>
array(3) {
[0]=>
string(1) “1”
[1]=>
string(1) “1”
[2]=>
string(1) “7”
}
[3]=>
int(1)
[4]=>
int(2)
}