I use several associative arrays in my PHP application and I\'m using PHP documentor to comment my sources. I never really did specify comments for the arrays in an array, b
I would look at the WordPress Inline Documentation Reference for some hints, though it's not currently comprehensive.
Use @param or @var or @property, whichever is appropriate in your context
According to those guidelines, you might document your associative array like this:
/**
* @property array $my_array {
* An array of parameters that customize the way the parser works.
*
* @type boolean $ignore_whitespace Whether to gobble up whitespace. Default true.
* @type string $error_level What the error reporting level is. Default 'none'.
* Accepts 'none', 'low', 'high'.
* }
*/