- var_dump: documentation ( source)
- unserialize: documentation ( source)
- serialize: documentation ( source)
<?php
$serialized = <<<ROLES
a:2:{i:0;s:16:"ROLE_SUPER_ADMIN";i:1;s:10:"ROLE_ADMIN";}
ROLES;
$roles = unserialize($serialized);
$roles[] = 'ROLE_SONATA_ADMIN';
var_dump(serialize($roles));