yes, but not in this case. The `::` is used in sentences that ends with a colon, e.g: `See this example:`. In that case, instead of adding `.. code-block:: php` 2 lines after this sentences, you should use `::`: `See this example::`. Sphinx will display the indented text under it as PHP code and change `::` into `:`.

But, :+1: for reading the standards before contributing!!