To expand on Isnipeu a bit (I could see someone thinking 'which' second arg)
The portion here;
local <name of object, best if same as command> = ulx.command( "<STRING- help category, ex Fun>", "<STRING - console command, example 'ulx <this>'>", <literal function name>, "<STRING - command used in chat to perform action>, <BOOLEAN-hide saychat or not>, <BOOLEAN-require spaces after command or not> )
Here's MrPresident's explode command from the conversion tutorial I link to previously, edited to use all the parameters (booleans at end, not required).
local explode = ulx.command( "Fun", "ulx explode", ulx.explode, "!explode", false, true )
See what it means now?
See what you have to change?