Custom exception classes in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a custom exception class named MyException.

PHP

<?php
class MyException extends [1] {
}
?>

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

ARuntimeException

BError

CThrowable

DException

Attempts:

3 left

💡 Hint

Common Mistakes

Extending a class that is not an exception base class.

Forgetting to extend any class.

The custom exception class must extend the built-in Exception class to behave like an exception.

2fill in blank

medium

Complete the code to throw a custom exception named MyException with the message 'Error occurred'.

PHP

<?php
throw new [1]('Error occurred');
?>

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

AMyException

BError

CException

DRuntimeException

Attempts:

3 left

💡 Hint

Common Mistakes

Throwing the base Exception instead of the custom one.

Using a class name that does not exist.

To throw the custom exception, use its class name MyException.

3fill in blank

hard

Fix the error in the code to catch the custom exception MyException.

PHP

<?php
try {
    // some code
} catch ([1] $e) {
    echo $e->getMessage();
}
?>

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

AMyException

BError

CException

DThrowable

Attempts:

3 left

💡 Hint

Common Mistakes

Catching the base Exception instead of the custom one.

Using a wrong class name in catch.

To catch the custom exception, the catch block must specify MyException.

4fill in blank

hard

Fill both blanks to define a custom exception class with a constructor that sets a default message.

PHP

<?php
class MyException extends [1] {
    public function __construct() {
        parent::[2]('Default error message');
    }
}
?>

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

AException

BError

C__construct

Dthrow

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong parent class.

Calling a method other than __construct.

The class extends Exception and calls the parent constructor __construct with a message.

5fill in blank

hard

Fill all three blanks to throw and catch a custom exception, then print its message.

PHP

<?php
class MyException extends Exception {}

try {
    throw new [1]('Custom error');
} catch ([2] $e) {
    echo [3];
}
?>

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

AException

BMyException

C$e->getMessage()

DError

Attempts:

3 left

💡 Hint

Common Mistakes

Throwing and catching different exception classes.

Printing the exception variable directly instead of calling getMessage().

The code throws and catches MyException and prints the exception message using $e->getMessage().