PHP OOP

For this PHP code exercise we will explore Object Oriented Programming in PHP by creating Shape classes: Shape.php, Rectangle.php, and Circle.php.

Shape.php is the base class. Shape class requirements are:

• A class constant named SHAPE_TYPE with a value of 1.
• Four properties with different visibilities: a public name, a protected length and width, and a private id.
• A constuctor which accepts a length and width parameter to initialize the respective properties.
• The constructor shoudl also initialize the id property to a unique id. (hint: use PHP's uniqid())
• Getter and Setter methods for the name property.
• A Getter method for the id property.
• A public area method which calculates and returns the area of the Shape object.
• A public static getTypeDescription method which returns the string Type: with the SHAPE_TYPE concatenated to the end.
• A public getFullDescription method which returns the string: Shape<#id>: name - length x width with variables id, name, length, and width substituted the objects values.

Rectangle.php should inherit from the Shape class. Rectangle class requirements are:

• A class constant named SHAPE_TYPE with a value of 2.

Note: if you used inheritance properly, the Rectangle class should not require any properties or methods.

Circle.php should inherit from the Shape class. Circle class requirements are:

• A class constant named SHAPE_TYPE with a value of 3.
• A protected radius property.
• A constuctor which accepts a radius parameter and initializes the radius property. **Don't forget to call the Shape class constructor.
• A public area method which calculates and returns the area of the Circle object.
• A public getFullDescription method which returns the string: Circle<#id>: name - radius with variables id, name, and radius substituted the objects values.

Just getting started?

Review the PHP Code Exercises documentation for more details on performing code exercises.

Need help?

Jump on the PHP channel in Slack and ask your fellow students and mentors for a hint.