problem with if and exact match

I want to be able to match if a string is contained within the string I am evaluating. I know that if ( $name == "xxjacksonxx"); based on the below would be true. But I want to be able to say if "jackson" is contained within $name that it's a match. I tried the below without success.. Not getting the operand properly.. <? $name = "xxjacksonxx"; if ( preg_match($name, "jackson")) { print "true"; } else { print "false"; } ?> Thanks! Jack