Referring to an array inside a PHP Object while defining the object

I have this object definition

return (object) [
    // the database information
    'db_info' => [
        'type' => 'mysql',
        'server' => 'localhost',
        'database' => 'myshop',
        'username' => 'root',
        'password' => 'password',
        'tableprefix' => 'password',
        'charset' => 'password'
    ],
    // the database tables
    'tables_info' => [
        'tblcountries' => db_info.database . '.'. db_info.tableprefix . 'countries',
        'tblsettings' => db_info.database . '.'. db_info.tableprefix . 'settings'
    ]
]

I am trying to use some of the array defined inside the same object

that is in the tables_info array

'tblcountries' => db_info.database . '.'. db_info.tableprefix . 'countries`

Is it possible, if yes how..

Solution 1:

You can do that in 2 steps like this

$obj =  (object) [
        'db_info' => [
            'type' => 'mysql',
            'server' => 'localhost',
            'database' => 'myshop',
            'username' => 'root',
            'password' => 'password',
            'tableprefix' => 'password',
            'charset' => 'password'
        ]
    ];


$obj->table_info = [
    'tblcountries' => $obj->db_info['database'] . '.' . $obj->db_info['tableprefix'] . 'countries',
    'tblsettings' => $obj->db_info['database'] . '.'. $obj->db_info['tableprefix'] . 'settings'
];

print_r($obj);

RESULT

stdClass Object
(
    [db_info] => Array
        (
            [type] => mysql
            [server] => localhost
            [database] => myshop
            [username] => root
            [password] => password
            [tableprefix] => password
            [charset] => password
        )
    [table_info] => Array
        (
            [tblcountries] => myshop.passwordcountries
            [tblsettings] => myshop.passwordsettings
        )
)

Or if you wanted everything to be an object rather that an object with arrays in

$obj =  (object) [
        'db_info' => (object) [
            'type' => 'mysql',
            'server' => 'localhost',
            'database' => 'myshop',
            'username' => 'root',
            'password' => 'password',
            'tableprefix' => 'password',
            'charset' => 'password'
            ]
        ];

$obj->table_info = (object) [
    'tblcountries' => $obj->db_info->database . '.' . $obj->db_info->tableprefix . 'countries',
    'tblsettings' => $obj->db_info->database . '.'. $obj->db_info->tableprefix . 'settings'
];

print_r($obj);

RESULT

stdClass Object
(
    [db_info] => stdClass Object
        (
            [type] => mysql
            [server] => localhost
            [database] => myshop
            [username] => root
            [password] => password
            [tableprefix] => password
            [charset] => password
        )
    [table_info] => stdClass Object
        (
            [tblcountries] => myshop.passwordcountries
            [tblsettings] => myshop.passwordsettings
        )
)