Question

// Source
Array
(
    [name] => ben
    [country] => ca
    [msg] => Array
        (
            [type] => mail
            [read] => 0
            [content] => hello world
        )
 )
// Change 
Array
(
    [msg] => Array
        (
            [read] => 1
        )
)
// Result
Array
(
    [name] => ben
    [country] => ca
    [msg] => Array
        (
            [type] => mail
            [read] => 1
            [content] => hello world
        )
)
$result = php_function($source,$change);

What php function allows this kind of transformation?

Answer 1

the function you are looking for is array_merge_recursive_simple()

See the comment to the php.net documentation of array_merge_resursive

Edit: This one is more elegant.