elements: 1 8 2.8 internet
count: 4

Array
(
    [0] => 1
    [1] => 8
    [2] => 2.8
    [3] => internet
)


new_count: 6

Array
(
    [0] => 1
    [1] => 8
    [2] => 2.8
    [3] => internet
    [4] => new1
    [5] => new2
)


last: new2

Array
(
    [0] => 1
    [1] => 8
    [2] => 2.8
    [3] => internet
    [4] => new1
)


values: value1 value2 value3
count: 3

Array
(
    [key1] => value1
    [key2] => value2
    [key3] => value3
)

Array
(
    [key1] => value1
    [key2] => value2
    [key3] => value3
    [new_key] => new_value
)

Array
(
    [key1] => value1
    [key2] => value2
    [key3] => value3
)


a value for the key specified as 8
a value for the key specified as 8


Array
(
)

Array
(
    [1] => 8
)

8