Try-catch execution flow in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch exceptions.

PHP

<?php
try {
    // code that may throw an exception
} catch ([1] $e) {
    echo $e->getMessage();
}
?>

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

AError

BThrowable

CException

DErrorException

Attempts:

3 left

💡 Hint

Common Mistakes

Using a class that does not represent exceptions will cause a fatal error.

Forgetting to specify a class in the catch block.

The Exception class is the base class for all exceptions in PHP and is used in catch blocks to handle exceptions.

2fill in blank

medium

Complete the code to throw an exception.

PHP

<?php
function checkAge($age) {
    if ($age < 18) {
        throw new [1]("Age must be at least 18.");
    }
    return true;
}
?>

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

AException

BErrorException

CThrowable

DError

Attempts:

3 left

💡 Hint

Common Mistakes

Using a class that is not throwable will cause an error.

Forgetting to use the 'new' keyword when throwing an exception.

The Exception class is used to create and throw exceptions in PHP.

3fill in blank

hard

Fix the error in the catch block to properly catch exceptions.

PHP

<?php
try {
    throw new Exception("Error occurred.");
} catch ([1]) {
    echo "Caught an exception.";
}
?>

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

AError $e

BException $e

CThrowable $e

DException

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the variable name after the exception class.

Using only the class name without a variable.

The catch block must specify the exception class and a variable to hold the exception object, like Exception $e.

4fill in blank

hard

Fill both blanks to create a try-catch block that catches exceptions and prints the message.

PHP

<?php
try {
    [1] new Exception("Something went wrong.");
} catch ([2] $e) {
    echo $e->getMessage();
}
?>

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

Athrow

Bcatch

CException

DError

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'catch' instead of 'throw' to raise an exception.

Catching with the wrong class.

Use throw to raise an exception and Exception in the catch block to handle it.

5fill in blank

hard

Fill all three blanks to create a try-catch-finally block that throws an exception, catches it, and executes finally.

PHP

<?php
try {
    [1] new Exception("Failed operation.");
} catch ([2] $e) {
    echo $e->getMessage();
} finally {
    [3] "Cleanup done.";
}
?>

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

Athrow

BException

Cecho

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'print' instead of 'echo' in finally (both work but only one is correct here).

Missing the variable name in catch block.

Use throw to raise the exception, catch with Exception, and print a message with echo in finally.