<h2>Tableaux indicés </h2>array_merge donne: Array
(
    [0] => Montréal
    [1] => Québec
    [2] => Trois-Rivières
    [3] => Ottawa
    [4] => Toronto
    [5] => Montréal
    [6] => Québec
)
<hr /><h2>Tableaux associatifs </h2>array_merge donne: Array
(
    [Montréal] => 21
    [Québec] => 3
    [Trois-Rivières] => 15
    [Ottawa] => 13
    [Toronto] => 12
)
<hr />array_merge_recursive donne : Array
(
    [Montréal] => Array
        (
            [0] => 10
            [1] => 21
        )

    [Québec] => Array
        (
            [0] => 20
            [1] => 3
        )

    [Trois-Rivières] => 15
    [Ottawa] => 13
    [Toronto] => 12
)