array_merge_indexes

array array_merge_indexes ( array $tablica, [array $...] )

Returns a sorted array of the indexes in the input arrays. Duplicate indexes are discarded. Example 1:

$a = array();
$a['jeden'] = 'element 1';
$a['dwa'] = 'element 2';
$a['trzy'] = 'element 3';
$a['cztery'] = 'element 4';

$a2 = array();
$a2['torba'] = 'element 1';
$a2['haczyk'] = 'element 2';
$a2['koala'] = 'element 3';
$a2['tusz'] = 'element 4';

print_r(array_merge_indexes($a,$a2));

Result:

Array
(
    [0] => cztery
    [1] => dwa
    [2] => haczyk
    [3] => jeden
    [4] => koala
    [5] => torba
    [6] => trzy
    [7] => tusz
)

Example 2:

$a = array();
$a['jeden'] = 'element 1';
$a['dwa'] = 'element 2';
$a['trzy'] = 'element 3';
$a['cztery'] = 'element 4';

print_r(array_merge_indexes($a));

Result:

Array
(
    [0] => cztery
    [1] => dwa
    [2] => jeden
    [3] => trzy
)