Combinations from an array in set of 6 but not reverse unique - php

Question

I am trying to figure out a function to get sets of 6 from an array.
I want to get every combination but not the unique combination.
For example if 1,2,3,4,5,6 already exsist 4,5,6,1,2,3 is not needed.
I just want the set of 6 possible combinations that will cover all numbers in the array.
Thank you for the help and your time.
I have tried:
function pc_permute($items, $perms = [], &$ret = []) {
if (empty($items)) {
$ret[] = $perms;
} else {
for ($i = count($items) - 1; $i >= 0; --$i) {
$newitems = $items;
$newperms = $perms;
list($foo) = array_splice($newitems, $i, 1);
array_unshift($newperms, $foo);
$this->pc_permute($newitems, $newperms,$ret);
}
}
return $ret;
}
but this is not what I want
my array is like:
$array = array(1,2,3,4,5,6,7,8,9);

Answer 1

One way to go about this is to shuffle() your array. Then copy the array using array_slice() from 0 - 5, 1 - 6, etc...
$arr = [1,2,3,4,5,6,7,8,9];
shuffle($arr);
$result = [];
for ($x = 0; $x < 6; $x++) {
$temp = array_slice($arr, $x, 6);
if ( count( $temp ) < 6 ) $temp = array_merge( $temp, array_slice($arr, 0, 6 - count( $temp ) ) );
shuffle($temp);
$result[] = $temp;
}
echo "<pre>";
print_r( $result );
echo "</pre>";
Sample output:
Array
(
[0] => Array
(
[0] => 8
[1] => 2
[2] => 7
[3] => 3
[4] => 6
[5] => 5
)
[1] => Array
(
[0] => 3
[1] => 8
[2] => 5
[3] => 7
[4] => 1
[5] => 2
)
[2] => Array
(
[0] => 1
[1] => 3
[2] => 4
[3] => 5
[4] => 2
[5] => 7
)
[3] => Array
(
[0] => 7
[1] => 5
[2] => 9
[3] => 1
[4] => 4
[5] => 3
)
[4] => Array
(
[0] => 4
[1] => 5
[2] => 6
[3] => 7
[4] => 9
[5] => 1
)
[5] => Array
(
[0] => 6
[1] => 8
[2] => 1
[3] => 9
[4] => 7
[5] => 4
)
)