Php Multidimensional Array - php

Question

I have below multidimensional array
$testarray=Array
(
1 => Array
(
0 => 'A',
1 => 'B'
),
2 => Array
(
0 => 'A',
1 => 'C'
),
3 => Array
(
0 => 'A',
1 => 'C',
2 => 'D'
),
4 => Array
(
0 => 'A',
1 => 'C',
2 => 'E'
),
5 => Array
(
0 => 'X',
1 => 'Y'
),
6 => Array
(
0 => 'X',
1 => 'Y',
2 => 'Z'
),
7 => Array
(
0 => 'X',
1 => 'Y',
2 => 'ZZ'
),
8 => Array
(
0 => 'P',
1 => 'Q'
),
9 => Array
(
0 => 'P',
1 => 'Q',
2 => 'R'
),
10 => Array
(
0 => 'P',
1 => 'Q',
2 => 'R',
3 => 'S'
)
);
I need to generate below array using $testarray (aultidimentional array):
array(A=array(B, C=array(D,E)),
X=array(Y=>array(Z,ZZ)),
P=array(Q=>array(R=>array(S))

Answer 1

At least in the version of PHP I use you can do something like
$testArray = Array(
1 => Array(
'A'=> Array(
//Value of A here
)
'B' => Array(
//Value of B here
)
);
To access them you can write
$testArray[1]['A'];
If you can change the value of $testArray this should help.

Answer 2

This should work. Any refinements (and explanations) would be appreciated.
foreach( $testarray as $values ) {
$depth = count($values);
$ref =& $array;
for( $i=0; $i<$depth; $i++ ) {
if( $i == $depth-1 ) {
$ref[] = $values[$i];
}
else {
if( !is_array( $ref ) || !array_key_exists( $values[$i], $ref ) ) {
$ref[$values[$i]] = array();
}
if( ( $key = array_search( $values[$i], $ref ) ) !== FALSE ) {
unset( $ref[$key] );
}
$ref =& $ref[$values[$i]];
}
}
}
Output:
array
'A' =>
array
0 => string 'B' (length=1)
'C' =>
array
0 => string 'D' (length=1)
1 => string 'E' (length=1)
'X' =>
array
'Y' =>
array
0 => string 'Z' (length=1)
1 => string 'ZZ' (length=2)
'P' =>
array
'Q' =>
array
'R' =>
array
0 => string 'S' (length=1)