If you would like to insert multiple values lets say from multiple inputs that have different post values but the same table to insert into then simply use:
mysql_query("INSERT INTO `table` (a,b,c,d,e,f,g) VALUES
('$a','$b','$c','$d','$e','$f','$g'),
('$a','$b','$c','$d','$e','$f','$g'),
('$a','$b','$c','$d','$e','$f','$g')")
or die (mysql_error()); // Inserts 3 times in 3 different rows