Question

• Explain how business websites can benefit from the different objects PHP offer that deal with XML. Using appropriate research and readings, explain how you, as a developer, can use the objects or components, to improve a business website.
• In many situations, websites store user data in XML format. Write a function or procedure that reads user input (say name, e-mail address, and comment) from the screen or form and stores them in a file in XML format. Define the XML file and explain why you selected this format. How can the website use your code to provide dynamic feedback to the user?

Answer 1

declare function prefix:function_name($parameter as datatype?...)
as returnDatatype?
{
the body of the function comes here..
}

-->The expression can be showed as:
declare function local:discount($price as xs:decimal?,$percentDiscount as xs:decimal?)
as xs:decimal? {
let $discount := $price - ($price * $percentDiscount div 100)
return $discount
};

let $originalPrice := 100

let $discountAvailed := 10

return ( local:discount($originalPrice, $discountAvailed))

--> Output for the above is => 90