Remove A|B duplicates from associative array in Laravel - php

Question

I have an associative array containing entries that are virtually the same, except the key-value pairs are swapped:
[
[
"partnerA" => "Alice",
"partnerB" => "Alfred"
],
[
"partnerA" => "Alfred",
"partnerB" => "Alice"
],
[
"partnerA" => "Alfred",
"partnerB" => "Brandon"
]
]
I stored the array in a Laravel collection and tried using ->unique()
$partners = collect($array)->unique();
but the output matches the array feeding in.
How can I remove duplicates like this from an array so each pair is unique no matter if the keys are swapped?
The desired output is:
[
[
"partnerA" => "Alice",
"partnerB" => "Alfred"
],
[
"partnerA" => "Alfred",
"partnerB" => "Brandon"
]
]
Update: What I've tried so far that seems to be working...
$size = sizeof($partners);
for($i = 0; $i <= $size; $i++){
$match = $partners[$i];
$needle = ["partnerA" => $match["partnerB"], "partnerB" => $match["partnerA"]];
if(in_array($needle, $partners)){
unset($partners[$i]);
}
}

Answer 1

Sort the pairs and concatenate the values for a unique key, then filter based on the result.
$unique_keys = array_keys(array_unique(array_map(
function($a){
sort($a);
return implode("", $a);
},
$partners
)));
$res = array_filter(
$partners,
function($a)use($unique_keys) {
return in_array($a, $unique_keys);
},
ARRAY_FILTER_USE_KEY
);
var_dump($res);
Output:
array(2) {
[0]=>
array(2) {
["partnerA"]=>
string(6) "Alfred"
["partnerB"]=>
string(5) "Alice"
}
[2]=>
array(2) {
["partnerA"]=>
string(6) "Alfred"
["partnerB"]=>
string(7) "Brandon"
}
}

Answer 2

Try this
$results = [
[
"partnerA" => "Alfred",
"partnerB" => "Alice"
],
[
"partnerA" => "Alfred",
"partnerB" => "Alice"
]
];
$newArray = [];
foreach($results as $result) {
if(is_array($result)) {
foreach($result as $key => $output) {
$newArray[$key] = $output;
}
}
}
print_r(array_unique($newArray));