- array_column: documentation ( source)
- var_export: documentation ( source)
<?php
$a =
array (
0 =>
array (
866 =>
array (
100355 => '0',
),
),
1 =>
array (
866 =>
array (
100844 => '0',
),
),
2 =>
array (
866 =>
array (
100586 => '0',
),
),
);
var_export(aray_values(array_column($a, 866)));