slypants

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I'm looking to create a page which displays expected rent payments and either shows rental income paid by each tenant or an amount outstanding. I believe the pseudo code for this is: Get the rent payments for the tenant_id from the database For a particular tenant_id { Look-up the start date for their tenancy, and the expected end date work out the delta between the two dates For each year { For each month { print the year and month Find all payments which match the iterated month and year, else write "outstanding" and the expected rental amount print the status (if payment is found), amount paid, date of payment and payment reference { } Total up the amount of rent paid and amount of rent outstanding for the tenant } I'm expecting to print a table which looks something like this: Year Month Status Amount Date Reference 2007 11 Paid 400 11/1/2007 PropA/11/A.N.Other 2008 12 Paid 400 12/1/2007 PropA/12/A.N.Other 2008 1 Paid 400 1/1/2008 PropA/1/A.N.Other 2008 2 Paid 400 2/1/2008 PropA/2/A.N.Other 2008 3 Overdue 400 3/1/2008 <null> 2008 4 Overdue 400 4/1/2008 <null> Questions I have: 1. Is this the correct approach? Should I be mani 8)pulating the dates (in_month, in_year, out_month, out_year) or using arrays or working between 2 dates another way to iterate? 2. I'm not sure how to manipulate the dates <$in_month = date("m",(strtotime($db_in_date)+60*60*24*($OFFSET))); > 3. How do I find the correct database record matching payment_year (int) and payment_month (int) to match the above 4. Any tips on how to efficiently do the status calculation (if record found then paid, else overdue)? Thanks in advance, Slypants