Executing a substitution table function only once

When you use substitution functions to modify substitution tables, you must be aware of the fact that StreamServer runs the scripts twice:

•	Once during the preprocess phase

•	Once during the process phase

To execute the substitution functions only once, you can use the PreProc function. The PreProc function returns 1 when the server is in the preprocess phase.

Example 48

Using the PreProc function.

/*Check if the server runs in preprocess phase. If it does, perform the substitution.*/

if (PreProc() = 1)
{
   $nb = AddSubst("../data/tables/author.tbl", "alfred", 1, "100");
}