PHP无法获得正确的数组格式

Question

I got stuck somehow on the following problem: What I want to achieve is to merge the following arrays based on key :

{"Entities":{"submenu_id":"Parents","submenu_label":"parents"}}
{"Entities":{"submenu_id":"Insurers","submenu_label":"insurers"}}
{"Users":{"submenu_id":"New roles","submenu_label":"newrole"}}
{"Users":{"submenu_id":"User - roles","submenu_label":"user_roles"}}
{"Users":{"submenu_id":"Roles - permissions","submenu_label":"roles_permissions"}}
{"Accounting":{"submenu_id":"Input accounting data","submenu_label":"new_accounting"}}

Which needs to output like this:

[{"item_header":"Entities"}, 
 {"list_items" :
    [{"submenu_id":"Parents","submenu_label":"parents"}, 
    {"submenu_id":"Insurers","submenu_label":"insurers"}]
}]
[{"item_header":"Users"}, 
 {"list_items" : 
    [{"submenu_id":"New roles","submenu_label":"newrole"}
    {"submenu_id":"User - roles","submenu_label":"user_roles"}
    {"submenu_id":"Roles - permissions","submenu_label":"roles_permissions"}]
}]
[{"item_header":"Accounting"}, 
 {"list_items" :
    [{"submenu_id":"Input accounting data","submenu_label":"new_accounting"}]
}]

I have been trying all kinds of things for the last two hours, but each attempt returned a different format as the one required and thus failed miserably. Somehow, I couldn't figure it out.
Do you have a construction in mind to get this job done?
I would be very interested to hear your approach on the matter.

Thanks.

Answer 1

Here you are!
In this case, first I added all arrays into one array for processing.
I thought they are in same array first, but now I realize they aren't. Just make an empty $array=[] then and then add them all in $array[]=$a1, $array[]=$a2, etc...

   $array = '[{"Entities":{"submenu_id":"Parents","submenu_label":"parents"}},
   {"Entities":{"submenu_id":"Insurers","submenu_label":"insurers"}},
   {"Users":{"submenu_id":"New roles","submenu_label":"newrole"}},
   {"Users":{"submenu_id":"User - roles","submenu_label":"user_roles"}},
   {"Users":{"submenu_id":"Roles - permissions","submenu_label":"roles_permissions"}},
   {"Accounting":{"submenu_id":"Input accounting data","submenu_label":"new_accounting"}}]';

   $array = json_decode($array, true);


    $intermediate = []; // 1st step

    foreach($array as $a)
    {
       $keys = array_keys($a);
       $key = $keys[0]; // say, "Entities" or "Users"
       $intermediate[$key] []= $a[$key];
    }

    $result = []; // 2nd step

    foreach($intermediate as $key=>$a)
    {
       $entry = ["item_header" => $key, "list_items" => [] ];
       foreach($a as $item) $entry["list_items"] []= $item;
       $result []= $entry;
    }

    print_r($result);