Question

I have to array and I want to merge this two array with a main key ( ID ) , and I would like to order alphabetically this NEW array ( the lastname field )

Array ( 
[0] =>
 Array ( [id] => 172 
         [user_id] => 1217330 
         [behaviour_action_id] => 97 
         [state] => accepted 
     ) 
[1] =>
 Array ( 
    [id] => 173
    [user_id] => 1217330 
    [behaviour_action_id] => 97 
    [state] => pending 
     ) ) 

And this array

Array ( 
[1217330 ] => 
Array ( [firstname] => Philip 
        [lastname] => Audet
        [birthdate] => 1995-07-17 
        [id] => 1217330 
        ) 
[232323] => 
Array ( [firstname] => Frédéric 
        [lastname] => Bouchard-Dubé
        [birthdate] => 1995-07-17 
        [id] => 232323
        ) 

And I would like to have this

[0] =>
 Array ( [id] => 172 
         [user_id] => 1217330 
         [behaviour_action_id] => 97 
         [state] => accepted
         [firstname] => Philip 
         [lastname] => Audet 
     ) 
[1] =>
 Array ( 
    [id] => 173
    [user_id] => 1217330 
    [behaviour_action_id] => 97 
    [state] => pending 
    [firstname] => Philip 
    [lastname] => Audet 
     ) ) 

I wont want to have the birthdate index for THIS array, I only want to get the firstname and the lastname from the second array. So I want to math the index USER_ID ( first_table) with ID (second table). I also want to order this new table alphabetically with the lastname (in my exemple, I don’t need to sort it alphabetically, but I will need to do this )

Can some one can help me please ? Thx
Thx

Answer 1

this one? (assuming $arr1 and $arr2 the given arrays)

$arr3 = array();
foreach($arr1 as $key=>$val) {
   $arr3[$key] = $val;
   $arr3[$key]["firstname"] = $arr2[$val["user_id"]]["firstname"];
   $arr3[$key]["lastname"] = $arr2[$val["user_id"]]["lastname"];
}

echo "<pre>";
print_r($arr3);
echo "</pre>";