- var_dump: documentation ( source)
- array_merge: documentation ( source)
<?php
$a = array( 'name' => 'a', '1' => 'null' );
$b = array( 'name' => 'b', 1 => 'zero' );
$c = array( 'name' => 'c', '1' => 'zeronull' );
var_dump($a);
var_dump($b);
var_dump(array_merge($a, $b));
var_dump(array_merge($a, $c));
var_dump(array_merge($a, $b, $c));
var_dump($a + $b);