Reset array keys in multidimensional array

Question

I've been looking around for a solution to this with no real success. I have a multidimensional array of parents and children with no limits on depth. This is generated from a database but the issue is that the item ID becomes the key using my way of arranging a flat array into a multidimensional array like so:

Array(
[28] => Array
 (
 [id] => 28
 [color] => #ff24e5
 [name] => Personal
 [parent_id] => 
 [children] => Array
 (
 [23] => Array
 (
 [id] => 23
 [color] => #41c3a3
 [name] => Shopping
 [parent_id] => 28
 [children] => Array
 (
 [22] => Array
 (
 [id] => 22
 [color] => #8be32b
 [name] => Deals
 [parent_id] => 23
 [children] => Array
 (
 )
 )
 )
 )
 [150] => Array
 (
 [id] => 150
 [color] => #e9a3f0
 [name] => Orders
 [parent_id] => 28
 [children] => Array
 (
 )
 )
 )
 )
)

What I would like, is a function that does the following:

Array (
[0] => Array
 (
 [id] => 28
 [color] => #ff24e5
 [name] => Personal
 [parent_id] => 
 [children] => Array
 (
 [0] => Array
 (
 [id] => 23
 [color] => #41c3a3
 [name] => Shopping
 [parent_id] => 28
 [children] => Array
 (
 [0] => Array
 (
 [id] => 22
 [color] => #8be32b
 [name] => Deals
 [user_id] => 1
 [selected] => 0
 [parent_id] => 23
 [children] => Array
 (
 )
 )
 )
 )
 [1] => Array
 (
 [id] => 150
 [color] => #e9a3f0
 [name] => Orders
 [parent_id] => 28
 [children] => Array
 (
 )
 )
 )
 )
)

Essentially reassign keys starting from 0. I've tried numerous methods, but I'm assuming that I need to find a recursive solution and when I tried that, it destroyed my array. I was reading up on the array_walk_recursive() function, but I don't quite know what to do beyond that. Essentially, is there a way to reset numeric keys in a multidimensional array?

Thanks for the help!

• Dan Grossman: I answered your question just after you asked it. It's 2 hours later, are you going to return? If this answered your question, please click the checkmark icon next to the answer to mark it as accepted.

Answer 1

You really need to add the is_numeric condition to stop text keys getting mixed up...

function fix_keys($array) {
 foreach ($array as $k => $val) {
 if (is_array($val)) 
 $array[$k] = $fix_keys($val); //recurse
 }
 if( is_numeric($k) )
 return array_values($array);
 return $array;
}

I did this instead:

function fix_keys($array) {
 $numberCheck = false;
 foreach ($array as $k => $val) {
 if (is_array($val)) $array[$k] = fix_keys($val); //recurse
 if (is_numeric($k)) $numberCheck = true;
 }
 if ($numberCheck === true) {
 return array_values($array);
 } else {
 return $array;
 }
}

• Patrick: Fantastic! This worked brilliantly for me, whereas the current correct answer did not.

Answer 2

function fix_keys($array) {
 foreach ($array as $k => $val) {
 if (is_array($val)) 
 $array[$k] = fix_keys($val); //recurse
 }
 return array_values($array);
}

• flicker: Great! Thanks. Didn't get an email, so I only checked now.
• flicker: This works but I am losing the array keys that are not numerical, how would I go about only reassigning numerical keys? Thanks

Answer 3

I was trying to fix the same problem, here is the code

$array = array_values($array);

• dearsina: This won't work for multi-dimensional arrays. The fix_keys() function above will work. 3v4l.org/vGmmJ

Answer 4

the correct answer reset all keys and dont ignore the not numeric keys, "Lobos" answer is a step in the right direction, but reset too the not numeric keys by level 2 and lower. for me this done the job perfect

function array_values_recursive($array) {
$temp = array();
foreach ($array as $key => $value) {
 if (is_numeric($key)) {
 $temp[] = is_array($value) ? array_values_recursive($value) : $value;
 } else {
 $temp[$key] = is_array($value) ? array_values_recursive($value) : $value;
 }
}
return $temp;

}