php: getting only top value in multidimensional array - php

Question

My nested array looks like:
[Minion] => Array
(
[old_first_name] => "\345\205\265"
[old_last_name] => "\345\274\265"
[old_name] => "\345\205\265\345\274\265"
)
[Evil Minion] => Array
(
[old_first_name] => "\347\251\216"
[old_last_name] => "\345\274\265"
[old_name] => "\345\274\265\347\251\216"
)
[Minion 2] => Array
(
[old_first_name] => "\345\212\233"
[old_last_name] => "\345\274\265"
[old_name] => "\345\274\265\345\212\233"
)
How do I just get Minion, Evil Minion, and Minion 2?
I tried a for loop but it's just looping through the contents of Minion which isn't what I want!

Answer 1

Use the array_keys function:
$keys = array_keys($array);
var_dump($keys);
This works for any array, whether it's one-dimensional or multi-dimensional.

Answer 2

Do this way.. you need to nest furthermore
<?php
$arr= array(
'Minion' => Array
(
'old_first_name' => "\345\205\265",
'old_last_name' => "\345\274\265",
'old_name' => "\345\205\265\345\274\265"
),
'Evil Minion' => Array
(
'old_first_name' => "\347\251\216",
'old_last_name' => "\345\274\265",
'old_name' => "\345\274\265\347\251\216"
),
'Minion 2' => Array
(
'old_first_name' => "\345\212\233",
'old_last_name' => "\345\274\265",
'old_name' => "\345\274\265\345\212\233"
)
);
foreach($arr as $arr1)
{
foreach($arr1 as $k=>$v)
{
echo "$k => $v";
}
}
Demo

Answer 3

You'd be interested in array_keys to just fetch the keys...
$keys = array_keys($arr);
Since this returns an array of the keys, you may further loop through it using a for-each construct.