my array is coming like this

```
 Array
    (
        [mes_id] => 1852
        [frm_id] => 376
        [network] => Array
            (
                [0] => Array
                    (
                        [alerttitle] => enter_nv
                        [alertImageUrl] => photos/952a7253eda21b936489d0f7b35f953bth.jpeg
                        [alertDescription] => (1) Network Invitation(s)
                        [alertType] => Network
                        [count] => 1
                        [id] => 376
                    )

            )
[msg] => Array
        (
            [0] => Array
                (
                    [alerttitle] => Raven Lexy
                    [alertImageUrl] => photos/81951b37ad01c4aa65662956f178214eth.jpeg
                    [alertDescription] => (1) New Message(s)
                    [alertType] => New Message
                    [count] => 1
                    [id] => 51
                )

            [1] => Array
                (
                    [alerttitle] => Raven Lexy
                    [alertImageUrl] => photos/81951b37ad01c4aa65662956f178214eth.jpeg
                    [alertDescription] => (1) New Message(s)
                    [alertType] => New Message
                    [count] => 1
                    [id] => 51
                )

        )

    )

```

how can i fetch alerttitle from each array?

please help,
thanks.