从包含相关逗号分隔值的单元素关联数组创建一个新的关联数组

Question

I am trying to create a new array structure from a single-element associative array where the key and the value are both comma-separated strings with related data.

Which array function should I use to do this?

Input array:

[
  "id,zip,state,city,county,territory,price" => "1,90001,CA,Los Angeles,Los Angeles,Orange CA,40"
]

Desired output:

[
    "id" => 1,
    "zip" => 90001,
    "state" => "CA",
    "city" => "Los Angeles",
    "county" => "Los Angeles",
    "territory" => "Orange CA",
    "price" => 40
]

Answer 1

"id,zip,state,city,county,territory,price" is one key, not multiple. So you have to split them.

$old = ["id,zip,state,city,county,territory,price" => "1,90001,CA,Los Angeles,Los Angeles,Orange CA,40"];

$keys = explode(',', $key = array_key_first($old));
$values = explode(',', $old[$key]);
$new = array_combine($keys, $values);

Gives

array(7) {
  ["id"]=>
  string(1) "1"
  ["zip"]=>
  string(5) "90001"
  ["state"]=>
  string(2) "CA"
  ["city"]=>
  string(11) "Los Angeles"
  ["county"]=>
  string(11) "Los Angeles"
  ["territory"]=>
  string(9) "Orange CA"
  ["price"]=>
  string(2) "40"
}

Answer 2

Almost identical to @Markus's, but key() can be used in more php versions.

Code: ( Demo )

$array = [
    "id,zip,state,city,county,territory,price" => "1,90001,CA,Los Angeles,Los Angeles,Orange CA,40"
];

$key = key($array);
var_export(
    array_combine(
        explode(',', $key),
        explode(',', $array[$key])
    )
);