Multiple interface implementation in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a class that implements two interfaces.

PHP

<?php
interface A {}
interface B {}
class MyClass implements [1] {}
?>

Drag options to blanks, or click blank then click option'

AA | B

BA & B

CA, B

DA B

Attempts:

3 left

💡 Hint

Common Mistakes

Using & or | instead of commas

Omitting commas between interfaces

In PHP, to implement multiple interfaces, list them separated by commas.

2fill in blank

medium

Complete the code to define interface B with a method named 'bar'.

PHP

<?php
interface B {
    public function [1]();
}
?>

Drag options to blanks, or click blank then click option'

Abar

Bfoo

Cbaz

Dqux

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong method names

Omitting parentheses

The interface B requires a method named 'bar'.

3fill in blank

hard

Fix the error in the class method implementation for interface A's method 'foo'.

PHP

<?php
interface A {
    public function foo();
}
class MyClass implements A {
    public function [1]() {
        echo "Hello";
    }
}
?>

Drag options to blanks, or click blank then click option'

Abaz

Bqux

Cbar

Dfoo

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong method names

Missing method implementation

The class must implement the method 'foo' exactly as declared in interface A.

4fill in blank

hard

Fill both blanks to complete the class implementing interfaces A and B with required methods.

PHP

<?php
interface A {
    public function foo();
}
interface B {
    public function bar();
}
class MyClass implements A, B {
    public function [1]() {
        echo "foo method";
    }
    public function [2]() {
        echo "bar method";
    }
}
?>

Drag options to blanks, or click blank then click option'

Afoo

Bbar

Cbaz

Dqux

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping method names

Omitting one method

The class must implement both methods 'foo' and 'bar' as declared in interfaces A and B.

5fill in blank

hard

Fill all three blanks to create a class that implements interfaces A and B and calls both methods.

PHP

<?php
interface A {
    public function foo();
}
interface B {
    public function bar();
}
class MyClass implements A, B {
    public function [1]() {
        echo "foo called";
    }
    public function [2]() {
        echo "bar called";
    }
}
$obj = new MyClass();
$obj->[3]();
$obj->bar();
?>

Drag options to blanks, or click blank then click option'

Afoo

Bbar

Cbaz

Dqux

Attempts:

3 left

💡 Hint

Common Mistakes

Calling undefined methods

Mismatching method names

The class implements 'foo' and 'bar'. The object calls 'foo' and 'bar' methods.