making custom BBCode, how do I make several {param}?

[TaMpE]

I am making a new custom BBCode but I don't know if {param} can be make numbered like this,

{param1} {param2} {param3}

then when the user enters this in the editor

line one (this value goes to {param1}) line two (this value goes to {param2}) line three (this value goes to {param3})


but I don't know if {param1} {param2} {param3} ever existed.