Multi-Dimensional Arrays

[Novice]

Just a quick question,
Are there 3x-dimensional arrays? I know there are 2x-dimensional arrays (this.array[0][2]), but I'm not sure if there are 3x-dimensional arrays (this.array[0][2][1]). I'm working on a database that I don't really want to reorganize without knowing this first.

For example:

PHP Code:

this.array = {
  { "Boo","Bar",{"BazBoo","BazBar"},"BooBar" },
  { "Bar","Baz",{"BooBar","BooBaz"},"BarBaz" }
}
return this.array[0][2][1]; 


Would the returned string be BazBar?