PHP search result help

hello
I have a form which have 5 drop down boxes which contains the initial values now this is my database I want to make a search result page in php which displays a single record with have following validations:

1. if all options (college, class, rollnumber, student_name, section) vaules will be --- or blank then redirect to select.php page (i.e. main page)
2. student_name is not required in all cases it can be blanked but not all others
3. college, class, rollnumber, student_name, section all fields are strictly to be match with a database tables and shows only a certain 1 result of profile details
4. profile_detail table cantains HTML value in database

If some one help me in this i'll be very thanks



CREATE TABLE IF NOT EXISTS `wizresult` (
`id` int(11) NOT NULL auto_increment,
`college` varchar(255) NOT NULL,
`class` varchar(255) NOT NULL,
`rollnumber` varchar(255) NOT NULL,
`student_name` varchar(255) NOT NULL,
`section` varchar(255) NOT NULL,
`profile_detail` longtext NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;