Let's say I have an array like this:
$my_array = array(1, 2, 3, 4, array(11, 12, 13, 14), 6, 7, 8, array(15, 16, 17, 18), 10);
I want to build a recursive function that returns an array which contains all the even numbers from my_array
. I tried something like:
function get_even_numbers($my_array)
{
$even_numbers = array();
foreach($my_array as $my_arr)
{
if(is_array($my_arr)
{
get_even_numbers($my_arr);
foreach($my_arr as $value)
{
if($value % 2 == 0)
{
$even_numbers[] = $value;
}
}
}
}
return even_numbers;
}
But it doesn't works.
Thank you
It's simple:
That, in PHP, looks like:
function recursive_even( $input) {
$even = array();
if( is_array( $input)) {
foreach( $input as $el) {
$even = array_merge( $even, recursive_even( $el));
}
}
else if( $input % 2 === 0){
$even[] = $input;
}
return $even;
}