<?php
$array = [
'bad_password' => '1',
'expired_token' => '2',
'bad_token' => '3',
'bad_permissions' => '4',
'user_not_found' => '5',
'connection_unsecure' => '6',
'already_logged_in' => '7',
'user_not_activated' => '8',
'user_banned' => '9',
'user_suspended' => '10',
'empty_email' => '11',
'empty_username' => '12',
'username_too_long' => '13',
'empty_password' => '14',
];
print_r(array_flip($array));
preferences:
27.53 ms | 402 KiB | 5 Q