help with phrases.. what are {1} ??

Here is the info:

construct_phrase (line 2107)
Construct Phrase
this function is actually just a wrapper for sprintf but makes identification of phrase code easier and will not error if there are no additional arguments. The first parameter is the phrase text, and the (unlimited number of) following parameters are the variables to be parsed into that phrase.

• return: The parsed phrase

string construct_phrase (string 0, mixed 1, mixed 2)

• string 0: Text of the phrase
• mixed 1: First variable to be inserted
• mixed 2: Nth variable to be inserted

You need to call that and add the appropriate values with PHP (A plugin or inside the php file you are using)