Accessing array elements in codeigniter using keys with \ in them - codeigniter-3

Question

My code is:
public function dirNames()
{
$maps = directory_map('./application',2);
print_r($maps);
}
I got an array like this:
Array ( [cache\] => Array ( [0] => index.html )
[config\] => Array ( [0] => autoload.php
[1] => config.php
[2] => constants.php
[3] => database.php
[4] => doctypes.php
[5] => foreign_chars.php
[6] => hooks.php
[7] => index.html
[8] => memcached.php
[9] => migration.php
[10] => mimes.php
[11] => profiler.php
[12] => routes.php
[13] => smileys.php
[14] => user_agents.php ) )
And I am trying to access the values and print them like this in my next step:
print_r($maps['cache\']);
So, it is showing an error like this:
An uncaught Exception was encountered
Type: ParseError
Message: syntax error, unexpected ''cache\']); ' (T_ENCAPSED_AND_WHITESPACE), expecting ']'
Filename: D:\xampp\htdocs\practice\application\controllers\Practice_controller.php
Line Number: 33
Backtrace:
File: D:\xampp\htdocs\practice\index.php
Line: 315
Function: require_once
My question is, how we can access values based on this type of keys? Please help me.
cache\

Answer 1

Hope this will help you :
access them by adding backslash ('\') as below :
$maps = directory_map('./application',2);
/* for cache*/
print_r($maps['cache\\']);
/* for config*/
print_r($maps['config\\']);