Convert multi-dimensional array key value - php

Question

I have array like:-
$x = array(
'a' => array('aa' => array('aaa' => array(1, 2, 3))),
'b' => array('bb' => array('bbb' => array(1, 2, 3))),
);
Then, I want to modifying array to:-
$y = array(
1 => array('a', 'b'),
2 => array('aa', 'bb'),
3 => array('aaa', 'bbb'),
);
Please help me!
NB: if the last array 2,1,3 will be 2->a,b; 1->aa,bb; 3->aaa,bbb

Answer 1

You can try something like this:
$x = array(
'a' => array('aa' => array('aaa' => array(1, 2, 3))),
'b' => array('bb' => array('bbb' => array(1, 2, 3))),
);
$loop=true;
$item=array();
foreach ($x as $index => $value) {
if(!is_int($index)) $item[strlen($index)][]=$index;
while($loop){
foreach ($value as $sub_index => $sub_value) {
if (is_array($sub_value)) {
if(!is_int($sub_index)) $item[strlen($sub_index)][]=$sub_index;
$value=$sub_value;
}
else {
if(!is_int($sub_index))$item[strlen($sub_index)][]=$sub_index;
$loop=false;
}
}
}
$loop=true;
}
var_dump($item);
output
array(3) {
[1]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" }
[2]=> array(2) { [0]=> string(2) "aa" [1]=> string(2) "bb" }
[3]=> array(2) { [0]=> string(3) "aaa" [1]=> string(3) "bbb" }
}

Answer 2

You could try the approach in the code below. And by the way, you could Quick-Test it Here.
<?php
$x = array(
'a' => array('aa' => array('aaa' => array(1, 2, 3))),
'b' => array('bb' => array('bbb' => array(1, 2, 3))),
);
$result = array();
$result[] = array_keys($x);
$tmp1 = [];
$tmp2 = [];
foreach($x as $k=>$arrData){
if(is_array($arrData)){
foreach($arrData as $k1=>$v1){
$tmp1[] = $k1;
if(is_array($v1)){
foreach($v1 as $k2=>$v2){
$tmp2[] = $k2;
}
}
}
}
}
$result[] = $tmp1;
$result[] = $tmp2;
var_dump($result);
//YIELDS:::
array (size=3)
0 =>
array (size=2)
0 => string 'a' (length=1)
1 => string 'b' (length=1)
1 =>
array (size=2)
0 => string 'aa' (length=2)
1 => string 'bb' (length=2)
2 =>
array (size=2)
0 => string 'aaa' (length=3)
1 => string 'bbb' (length=3)

Answer 3

Based on what you explained, I would suggest something like this:-
$x = array(
'a' => array('aa' => array('aaa' => array(1, 2, 3))),
'b' => array('bb' => array('bbb' => array(1, 2, 3))),
);
$y = array();
$l = array();
foreach ($x as $l[0] => $x2) {
foreach ($x2 as $l[1] => $x3) {
foreach ($x3 as $l[2] => $keys) {
for ($i = 0; $i < 3; $i++) {
if (isset($y[$keys[$i]])) {
$y[$keys[$i]][] = $l[$i];
} else {
$y[$keys[$i]] = array($l[$i]);
}
}
}
}
}
But please note that this code will fail if the depth changes or does not match the number of values that become keys...