array_walk_recursive

array_walk_recursive

Apply a user function recursively to every member of an array

true **array_walk_recursive**  $array callable $callback mixed $arg

Applies the user-defined function to each element of the . This function will recurse into deeper arrays. callback``array

arrayThe input array.

callback Typically, takes on two parameters. The parameter's value being the first, and the key/index second. callback``array

Opmerking: > If needs to be working with the actual values of the array, specify the first parameter of as a . Then, any changes made to those elements will be made in the original array itself. callback``callbackreference

arg If the optional parameter is supplied, it will be passed as the third parameter to the . arg``callback

return.true.always

Voorbeeld: example

<?php
$sweet = array('a' => 'apple', 'b' => 'banana');
$fruits = array('sweet' => $sweet, 'sour' => 'lemon');

function test_print($item, $key)
{
    echo "$key holds $item\n";
}

array_walk_recursive($fruits, 'test_print');
?>

a holds apple
b holds banana
sour holds lemon

 You may notice that the key '' is never displayed. Any key that holds an
  will not be passed to the function.
`sweet``array`

array_walk