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Search within associative array

Search within associative array
this is value -- pc..5 Parent
this is column -- $data['user_name']
Array
(
    [0] => Array
        (
            [id] => 12
            [user_name] => Tintin-PC..1 Parent
            [port] => 744
            [ip] => 122.162.235.239
            [source] => India
            [type] => 1
            [version] => 1
        )

    [4] => Array
        (
            [id] => 25
            [user_name] => pc..5 Parent
            [port] => 264
            [ip] => 115.249.8.245

            [source] => India
            [type] => 1
            [version] => 5
        )

array_search('pc..5 Parent', array_map(function($data) {return $data['user_name'];}, $arrayofparents));

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