Online PHP editor | refs for dYVFO

<?php $a = array( 'name' => 'a', (string)'1' => 'null' ); $b = array( 'name' => 'b', 1 => 'zero' ); $c = array( 'name' => 'c', (string)'1' => 'zeronull' ); var_dump($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);