How to create dynamic combination with php? - php

Question

I have 3 array like
$arr = [
"color" => [["name"=>"red"]],
"size" => [["name"=>"18 inch"], ["name"=>"15 inch"]],
"type" => [["name"=>"plastic"]]
]
$combo = array();
foreach ($arr['size'] as $size) {
foreach($arr['color'] as $color){
foreach ($arr['type'] as $type) {
$variant = json_encode(['size' => $size->name, 'color' =>
$color->name, 'type' => $type->name]);
array_push($combo,$variant);
}
}
}
echo $combo;
// result
0 => "{"size":"15 inch","color":"yellow","type":"metal"}"
1 => "{"size":"18 inch","color":"yellow","type":"plastic"}"
It works properly but but there is can be less or more variants. How can I handle this.
For example
$arr = [
"size" => [["name"=>"18 inch"], ["name"=>"15 inch"]],
"type" => [["name"=>"plastic"]]
]
Or
$arr = [
"color" => [["name"=>"red"]],
"size" => [["name"=>"18 inch"], ["name"=>"15 inch"]],
"type" => [["name"=>"plastic"]],
"brand" => [['name' => 'something']],
]

Answer 1

For what i understand, you have to combine the arrays of properties into one array of
object.
I have to leave now, but if you need a explanation leave a comment and i updated the answers
$arr = [
"color" => [["name"=>"red"],['name'=>'yellow']],
"size" => [["name"=>"18 inch"], ["name"=>"15 inch"]],
"type" => [["name"=>"plastic"]],
"brand" => [['name' => 'something']],
];
function runFor($arr ,&$array, $keys,$index,&$positions){
foreach ($arr[$keys[$index]] as $key => $espec){
$positions[$keys[$index]] = $key;
if($index + 1 < count($keys)){
runFor($arr,$array,$keys, $index+1,$positions);
}else{
$item = (object)[];
foreach ($keys as $key){
$item->$key = $arr[$key][$positions[$key]]['name'];
}
array_push($array,$item);
}
unset($positions[$keys[$index]]);
}
}
$array = array();
$keys = array_keys($arr);
$positions = [];
runFor($arr,$array,$keys,0,$positions);
$combo = array();
foreach ($array as $item){
array_push($combo,json_encode($item));
}
var_dump($combo);