like the talentsprint for competetive exam where a students get enrollment number so he/she can give online test of various exams like bank, ssc, railways, insurance, tet, accountant, psc exams etc
I was experience to build web app using PHP & MySQL. For the web like you want, i can make it only in one week (7 days).
The feature is : login for administrator & students, timer for pass the test, randoming examination, administrator page, etc.