# Referring to nested arrays and array_merge (php)

In such an array:

$arr = Array ( [key0] => Array ( [subkey0] => Array ( [0] => "value0" [1] => "value1" ) [subkey1] => Array ( [0] => "value0" [1] => "value1" ) ) [key1] => Array ( [subkey0] => Array ( [0] => "value0" [1] => "value1" ) [subkey1] => Array ( [0] => "value0" [1] => "value1" ) ) )  In order to add$varX to the end of $arr[keyX][subkeyX] as [X] =>$varX, I use, inside a loop, the following:

$arr[$key] = array(
"subkey0" => array_merge((array)$arr[$key]["subkey0"], (array)$var1), "subkey1" => array_merge((array)$arr[$key]["subkey1"], (array)$var2)
...
)


And I might be working with even more nested arrays, so I was wondering if there was a way for subkey0 to refer to itself, or if I could do something like:

"subkeyX" =>+ (array)$varX  Or use array_merge() in a different way to add $varX to the end of subkeyX as [X] => $varX. ## 1 Answer I don't know if I understand the question right. But this should work. foreach ($keys as $key) {$arr2[$key]['subkey0'][] =$var1;
$arr2[$key]['subkey1'][] = \$var2;
}

• Thanks but it does not seem to work. For instance, check this phpfiddle -- click on run to see the results.
– Alex
Mar 30, 2013 at 1:11
• Sorry, my answer was not clear enough. I edited it. Mar 30, 2013 at 1:54