Why error handling matters in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch an exception in PHP.

PHP

<?php
try {
    // Some code that may throw an exception
} catch (Exception [1]) {
    echo 'Error caught!';
}
?>

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

A$error

B$ex

C$e

D$exception

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the dollar sign before the variable name.

Using a variable name not declared in the catch block.

In PHP, the catch block requires a variable to hold the exception object, commonly $e.

2fill in blank

medium

Complete the code to throw an exception when a condition is met.

PHP

<?php
if ($age < 18) {
    [1] new Exception('Age must be 18 or older');
}
?>

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

Athrow

Bcatch

Craise

Dtry

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'raise' instead of 'throw'.

Using 'catch' or 'try' incorrectly.

In PHP, to trigger an exception, you use the throw keyword.

3fill in blank

hard

Fix the error in the code to properly handle exceptions.

PHP

<?php
try {
    $file = fopen('data.txt', 'r');
    if (!$file) {
        [1] new Exception('File not found');
    }
} catch (Exception $e) {
    echo $e->getMessage();
}
?>

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

Athrow

Bcatch

Ctry

Draise

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'raise' which is not valid in PHP.

Using 'catch' inside the try block.

The code must use throw to raise an exception inside the try block.

4fill in blank

hard

Fill both blanks to create a custom exception class and throw it.

PHP

<?php
class [1] extends Exception {}

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

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

AMyException

Bthrow

Ccatch

DException

Attempts:

3 left

💡 Hint

Common Mistakes

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

Not extending the Exception class.

You define a custom exception class by extending Exception. Then you throw an instance of it.

5fill in blank

hard

Fill all three blanks to handle multiple exceptions properly.

PHP

<?php
try {
    // Some code
} catch ([1] $e) {
    echo 'First error: ' . $e->getMessage();
} catch ([2] $e) {
    echo 'Second error: ' . $e->getMessage();
} catch ([3] $e) {
    echo 'General error: ' . $e->getMessage();
}
?>

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

AFirstException

BSecondException

CException

DError

Attempts:

3 left

💡 Hint

Common Mistakes

Catching the general Exception first, which prevents specific catches.

Using 'Error' instead of 'Exception' for general catch.

Use specific exception classes first, then the general Exception class last to catch all other exceptions.