Combining 2 arrays

[blinks]

I have 2 arrays:

 

Array1=
([0] => Array ( [id] => 521 [countA] => 2 [dateA] => 2011-11-07 )
[1] => Array ( [id] => 647 [countA] => 5 [dateA] => 2011-12-07 )
[2] => Array ( [id] => 660 [countA] => 1 [dateA] => 2011-11-03 ))
Array2=
( [0] => Array ( [id] => 321 [countB] => 2 [dateB] => 2011-12-07 )
[1] => Array ( [id] => 645 [countB] => 5 [dateB] => 2011-11-01 )
[2] => Array ( [id] => 660 [countB] => 1 [dateB] => 2011-12-07 )) 
which I want to combine into a single array:
     
Result=
( [0] => Array ( [id] => 321 [countA] => [dateA] => [countB] => 2 [dateB] => 2011-12-07 ) 
[1] => Array ( [id] => 521 [countA] => 2 [dateA] => 2011-11-07 [countB] => [dateB] => )
[2] => Array ( [id] => 645 [countA] => [dateA] => [countB] => 5 [dateB] => 2011-11-01 )
[3] => Array ( [id] => 647 [countA] => 5 [dateA] => 2011-12-07 [countB] => [dateB] => )
[4] => Array ( [id] => 660 [countA] => 1 [dateA] => 2011-11-03 [countB] => 1 [dateB] => 2011-12-07 )) 

 

Is it possible to do this via something like array_diff, without having to loop through the arrays?

[smoseley]

$Result = array_merge($Array1, $Array2);

[blinks]

Smoseley, thanks for your reply. Unfortunately array_merge doesn't do what I want, as it simply appends one array after the other.

 

Apologies for my arrays being so badly formatted and hard to read.

 

What I want to do is merge the arrays so that keys/values that exist in both arrays are retained; and where a key exists in both arrays, also retain all values in both arrays.

 

[smoseley]

Oops, missed the overlap. This'll work (though a bit sloppy):

$Result = array_filter(array_merge($Array1, $Array2), function($arr) {
    global $keys;
    $keys = is_array($keys) ? $keys : array();
    $keys[$arr['id']] = isset($keys[$arr['id']]) ? $keys[$arr['id']]+1 : 0;
    return $keys[$arr['id']] == 0;
});

[Pikachu2000]

code tags will help preserve the formatting. Fixed it for ya.

[smoseley]

Ok, now I see you want to merge the child array conditionally if there's overlap.  I don't think PHP can do that without a loop.

 

Using loops, the solution is so simple!

 

$Result = array();
foreach ($Array1 as $item) $Result[$item['id']] = $item;
foreach ($Array2 as $item) $Result[$item['id']] = isset($Result[$item['id']]) ? array_merge($Result[$item['id']], $item) : $item;

 

[smoseley]

Oh, and if you require your indexes to be 0,1,2,... you can just do this at the end:

 

$Result = array_values($Result);

[blinks]

Smoseley, thanks so much. That did the trick! And thanks, Pikachu2000 for that reformatting :-)