Information Macros

This website supports note, tip, caution, and danger macro messages.

These can be added with admonition syntax:

markdown

:::note
Your **content** goes here...
:::

Note message

:::note This change was introduced in HHVM 4.136. :::

The noreturn type can be upcasted to dynamic.

:::tip To start learning Hack, read our Getting Started documentation! :::

Hack lets you write code quickly, while also having safety features built in, like static type checking.

:::caution We do not recommend using experimental features until they are formally announced and integrated. :::

This website maintains documentation on Hack features that are in the experimental phase.

:::danger Use this method with caution. If your query contains ANY unescaped input, you are putting your database at risk. :::

While inherently dangerous, you can use AsyncMysqlConnection::query to query a MySQL database client.