Silly sprintf() question

Question

How do I add the SQL wildcard characters to this:

 sprintf("SELECT robot FROM robots WHERE robot LIKE '%s'",strtolower($user_agent));

as

 sprintf("SELECT robot FROM robots WHERE robot LIKE '%%s%'",strtolower($user_agent));

blows up in a spectacular ball of flame,

PS sorry for the rather basic question. I'm cutting down on my coffee these days.

Answer 1

A literal % is specifed as %%, so you want "... LIKE '%%%s%%'"