Remove duplicate items from an array [duplicate]

Answer 1

Try this:

$data = array_map('unserialize', array_unique(array_map('serialize', $data)));

Outputs the following:

Array
(
    [0] => Array
        (
            [RecipientID] => 3
            [RecipientScreenname] => Tom L
            [RecipientFirstname] => Thomas
            [RecipientEmail] => info@xx.com
        )

    [2] => Array
        (
            [RecipientID] => 1
            [RecipientScreenname] => Lau T
            [RecipientFirstname] => TK
            [RecipientEmail] => lau@xx.co.uk
        )
)

But I also think you should implement this in your database. Also, check my other answer and solutions.