ahmad alhayek

Question

using php

Create a Web application that get the radius value for user, when user click area button: computeArea should be executed, and when user click Circumference button: computeCircumference should be executed.

1.   Class User, requirements are:
-   Three properties (id, name, email).
-   Setters and getters for each property.
-   Helper method to validate email if valid as the following format (letters+-+digits@letter+digits or just letters .com).
-   Helper method to validate id if valid as the following format (UR+-+4 digits).
-   Any object of user should be initialized automatically at creation time.

2.   Class Circle , requirements are:
-   Two properties: radius, constant PI.
-   Setter and getter for radius.
-   Constructor initialize radius.
-   Destructor print “ Circle class Destructor”
-   Helper method to validate if radius is number when set value to it.
-   Two methods: computeArea , computeCircumference.
Area= radius^2 * PI
Circumference= 2*radius*PI

Answer 1

<?php
// Class User
class User {
    // Three properties (id, name, email)
    private $id;
    private $name;
    private $email;

    // Setter method for id
    function set_id($id) {
        if($this->is_valid_id($id)) {
            $this->id = $id;
        }
    }

    // Setter method for name
    function set_name($name) {
        $this->name = $name;
    }

    // Setter method for email
    function set_email($email) {
        if($this->is_valid_email($email)) {
            $this->email = $email;
        }
    }

    // Getter method for id
    function get_id() {
        return $this->id;
    }

    // Getter method for name
    function get_name() {
        return $this->name;
    }

    // Getter method for email
    function get_email() {
        return $this->email;
    }

    // Helper method to validate email if valid
    private function is_valid_email($email) {
        return filter_var($email, FILTER_VALIDATE_EMAIL) 
            && preg_match('/@.+\./', $email);
    }

    // Helper method to validate id if valid as the following format (UR+-+4 digits)
    private function is_valid_id($id) {
        return (bool) preg_match('/^UR-[0-9]{4}$/', $id);
    }
}

// Create an object of User
$user = new User();
$user->set_id("UR-1234"); // Set id
$user->set_name("Jerry"); // Set name
$user->set_email("jerry@tom.com"); // Set email

// Display the details
echo "<b>Name:</b> ".$user->get_name()."<br>";
echo "<b>ID:</b> ".$user->get_id()."<br>";
echo "<b>Email:</b> ".$user->get_email()."<br>";

// Class Circle
class Circle {
    // Two properties: radius, constant PI.
    private $radius;
    const PI = 3.14;

    // Constructor to initialize radius.
    function __construct($radius) {
        if($this->is_valid_radius($radius)) {
            $this->radius = $radius;
        }
    }

    // Destructor to print “Circle class Destructor”
    function __destruct() {
        print "Circle class Destructor";
    }

    // Setter method for radius
    function set_radius($radius) {
        if($this->is_valid_radius($radius)) {
            $this->radius = $radius;
        }
    }

    // Getter method for radius
    function get_radius() {
        return $this->radius;
    }

    // Helper method to validate if radius is number when set value to it.
    private function is_valid_radius($radius) {
        if($radius > 0) {
            return true;
        } else {
            return false;
        }
    }

    // Method to compute compute area of circle
    function computeArea() {
        return self::PI * $this->radius * $this->radius;
    }

    // Method to compute circumference area of circle
    function computeCircumference() {
        return 2 * self::PI * $this->radius;
    }
}

if(isset($_POST['radius'])) {
    // Create an object of Circle
    $circle = new Circle((int) $_POST['radius']);
    if(isset($_POST['computeArea'])) {
        // when user click Circumference button: computeCircumference will be executed.
        print "<br>Radius: ".$circle->get_radius()."<br>Area: ".$circle->computeArea()."<br>";
    }
    if(isset($_POST['computeCircumference'])) {
        // when user click Area button: computeArea will be executed.
        print "<br>Radius: ".$circle->get_radius()."<br>Circumference: ".$circle->computeCircumference()."<br>";
    }
}
?>

<html>
    <head>
        <title>Circle</title>
    </head>
<body>
    <br /><br />
    <form action="" method="POST">
        Radius: <input type="number" name="radius" />
        <br /><br />
        <button type="submit" name="computeArea">Area</button>
        <button type="submit" name="computeCircumference">Circumference</button>
    </form>
</body>
</html>

Screenshot of the code:

1 <?php 2 // Class User 3 class User { 4 // Three properties (id, name, email) 5 private $id; 6 private $name; 7 private $ema