What is draw the structure of php application?

I have been ask开发者_Go百科ed to make a php application. There is a part in the requirements that says

draw the structure of application and scripting as well.

What does it mean? I have already done the script. Does it mean that I have to make a diagram of it, like DB diagram in dia or in some other software?

If it is like UML design then please check this website: http://www.websequencediagrams.com/

for which I have entered the description like this:

WebBrowser->Server: Input

Server->PHP: Request

PHP->Processing: Action

Processing->To Server: Process DB To Server->To Browser: Output

Also, what do you think that what should be the description of following in order to make the UML diagram on above said website:

1. The application needs to import contacts from CSV file or TXT file.
2. While importing the contacts, the application should remove duplicates
3. There will be two type of contacts, email,and the Phone Number. The application should sense the contact type and differentiate.
4. The application should be able to send bulk emails to all contacts in the list.
5. The application should log number of emails sent to certain user i.e. (if first we get 10 emails addresses in list and send them 2 emails and afterwards add 34 new email addresses and and then send 3 emails, there should be a log of which user received how many emails from our app).

Please help me out.

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By draw the structure, I think they're referring to a flow chart or uml diagram illustrating how the application will function (class diagram).

They probably want a database relational diagram as well.

That's just what I think, based on what you wrote.