Quote: you send it from function that runs only on client

Does it means if{}s that only run on client, too?
For example:
function function_sending() //only on server
{
send_var(var_a);
}
function main()
{
something;
if(connection == 2)
{
while(var_a == 0) wait(1);
etc;
}
if(connection == 3)
{
function_sending();
}
}