PHP – How I can get key name of array

Question

My array looks like this:

Array
(
   [1] => Array
      (
         [a] => a
         [b] => b
      )
   [2] => Array
      (
         [a] => c
         [b] => d
      )
   [3] => Array
      (
         [a] => e
         [b] => f
      )
)

And I use this code to search definied value:

$key = array_search('c', array_column($array, 'a'));

But $key not returns '2' (name of key) but '1' (numerically (0, 1, 2, 3)). How I can get name of key?

deceze · Accepted Answer · 2015-07-24 18:08:11Z

1

$key = array_search('c', array_map(function($v){return $v['a'];}, $array));

edited Jul 24, 2015 at 18:08

deceze♦

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answered Jul 24, 2015 at 18:05

JOE LEE

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1 Comment

MirroredFate Over a year ago

Would you mind expanding your answer to explain what's going on here?

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