Correct PHP errors in Investment Site.

Here is the algorithm. Follow and edit all errors. 1. There are two Investment Categories: a. SCS: Users deposit between 5,000 and 50,000. Day 1 users deposit 20%. And after 24hours investment starts to grow by 2% of capital every day. That is, (Capital + 2%) every day. On day 7, users pay 80%. Day 6, reminder email is sent to users. On day 15 investment circle stops and users can then withdraw profit = (Capital + (2% x 15)) Clauses: i. If users don't make deposit after 48hours, their account becomes inactive. Admin can make them active from admin panel and they can then login. ii. If users don't make deposit 24hours after day 7 they are to pay 80%, then users account become inactive for 3days and their 2% daily increase is paused. In Admin Panel, Admin can make user active. And when admin makes active, then 2% continues to count. iii. On day 15 before user can withdraw profit, user is asked to pay 15% of capital and on successful payment, then user account details are sent to admin panel for payment. After this, ewallet goes back to zero and also Withdrawable amount. iv. There is Pay via Bank option and also Pay Online option. When user pay manually to bank, then the click on the Pay via Bank button and fill the form and their details are sent to the admin. Admin then sends their details via form to database. When users either pay online or manually via bank, once their payments is successful and their details are entered into the database, their timer should change. Also, dashboard figures should be well updated. Validate the admin form for user data entries to database to avoid errors. Username must match anyone in database already, also date & time. On day 7, after users pay 80% via bank manually, how is admin going to fill the form to send entries to database? Why not create another form for 80% payment? Also, once data is sent to database, timer should change and dashboard figures updated. Both Pay via Bank and also Pay Online option. 2. WCS is the same thing as SCS, but payment before withdrawal is 10%. This is all I am asking for.