<?php
$arr = [
'USA' =>
[
'Alabama' =>
[
'Montgomery',
'Birmingham'
],
'Arizona' =>
[
'Phoenix',
'Mesa',
'Gilbert'
]
],
'Germany' =>
[
'West Germany' =>
[
'Bonn',
'Cologne'
]
]
];
$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
$keys = array();
foreach ($iterator as $key => $value) {
// Build long key name based on parent keys
$key = [$key];
for ($i = $iterator->getDepth() - 1; $i >= 0; $i--) {
//$key = $iterator->getSubIterator($i)->key() . '_' . $key;
array_unshift($key, $iterator->getSubIterator($i)->key());
}
$key[] = $value;
$keys[] = $key;
}
var_export($keys);
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- array (
0 =>
array (
0 => 'USA',
1 => 'Alabama',
2 => 0,
3 => 'Montgomery',
),
1 =>
array (
0 => 'USA',
1 => 'Alabama',
2 => 1,
3 => 'Birmingham',
),
2 =>
array (
0 => 'USA',
1 => 'Arizona',
2 => 0,
3 => 'Phoenix',
),
3 =>
array (
0 => 'USA',
1 => 'Arizona',
2 => 1,
3 => 'Mesa',
),
4 =>
array (
0 => 'USA',
1 => 'Arizona',
2 => 2,
3 => 'Gilbert',
),
5 =>
array (
0 => 'Germany',
1 => 'West Germany',
2 => 0,
3 => 'Bonn',
),
6 =>
array (
0 => 'Germany',
1 => 'West Germany',
2 => 1,
3 => 'Cologne',
),
)
- Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/ueSBB on line 2
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected '[' in /in/ueSBB on line 2
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/ueSBB on line 2
Process exited with code 255.
preferences:
228.26 ms | 401 KiB | 340 Q