php - Getting data from Serialize data -

what i'm trying data serialized data. got inputs power name, i'm trying make shows if user has power.

here serialized data

a:1:{s:6:"powers";a:1:{s:7:"profile";a:1:{s:3:"has";b:0;}}} 

trying has part of data gets name of power.

php code

foreach ($c['powers'] $a => $b) {             echo $a;  } 

the $c['powers'] start of serialize data can see here s:6:"powers"

let's see how looks unserialized:

var_export(unserialize('a:1:{s:6:"powers";a:1:{s:7:"profile";a:1:{s:3:"has";b:0;}}}')); 

outputs:

array (   'powers' =>   array (     'profile' =>     array (       'has' => false,     ),   ), ) 

so 'has' => false not element of c['powers'] of $c['powers']['profile']