- print_r: documentation ( source)
- array_replace: documentation ( source)
<?php
$a = array("a" => "apple", "b" => "banana");
$b = array("a" => "pear", "b" => "strawberry", "c" => "cherry");
print_r($a + $b); // Union of $a and $b
print_r(array_replace($b + $a));