<?php
$data = [
['alteration1', 'alteration4',],
['alteration2','alteration3'],
['alteration2','alteration3'],
[]
];
$combinations = [[]];
foreach($data as $index => $current_data){
$current_data = array_unique($current_data);
if(empty($current_data)) continue;
$temp_combinations = [];
foreach($current_data as $value){
foreach($combinations as $each_combination){
$temp_combinations[] = array_merge($each_combination,[$value]);
}
}
$combinations = $temp_combinations;
}
$set = [];
$unique_combinations = [];
foreach($combinations as $each_combination){
natsort($each_combination);
$serialized_form = implode(",",$each_combination);
if(isset($set[$serialized_form])) continue;
if(empty($each_combination)) continue;
$unique_combinations[] = $each_combination;
$set[$serialized_form] = true;
}
print_r($unique_combinations);
preferences:
77.36 ms | 402 KiB | 5 Q