Change the key of an array

Question

I have an array that contains year as follows. This key is going to be dynamic. NowI want to replace new_2018 to "2018".

$array = array( array( "new_2018" => "john", ) );

I have tried following approach. This is also working fine. But regarding quality I am not sure. Can anybody help me improve the quality of this code.

$newArr = array(); foreach ($array as $value) { foreach($value as $key => $val) { list($a, $year) = explode('_', $key); $newArr[][$year] = $val; } }

Your data structur seems a bit weird. Why do you add new_ when you want to remove it?... what if you split your data to year, status and name instead ? — B001ᛦ
– B001ᛦ, Commented Jan 21, 2019 at 14:13
this new_ is coming from query which I am not allowed to modify — user1687891
– user1687891, Commented Jan 21, 2019 at 14:14
Possible duplicate of In PHP, how do you change the key of an array element? — Maksym Fedorov
– Maksym Fedorov, Commented Jan 21, 2019 at 14:15
@MaximFedorov yes it can be duplicate but in my case I new_2018 is not fixed.. it can be any value with new_ — user1687891
– user1687891, Commented Jan 21, 2019 at 14:16

myxaxa · Accepted Answer · 2019-01-21 14:22:48Z

it is ugly, but... and be careful with accessing by reference - don't forget to unset the variable:

<?php $array = array( array( "new_2018" => "john", ) ); foreach ($array as &$value) { foreach($value as $key => $val) { $newKey = str_replace("new_", "", $key); $value[$newKey] = $val; unset($value[$key]); } } unset($value); var_dump($array);

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