Controller methods and actions in Laravel - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a controller method that returns a view named 'welcome'.

Laravel

public function index() {
    return view('[1]');
}

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

Awelcome

Bindex

Cdashboard

Dhome

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong view name causes a 'view not found' error.

Forgetting to return the view from the method.

The view function loads the Blade template named 'welcome'. This is the correct view to return.

2fill in blank

medium

Complete the code to define a controller method that accepts a parameter $id and returns it.

Laravel

public function show([1]) {
    return $id;
}

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

A$id

B$name

C$user

D$data

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the variable returned.

Forgetting the $ sign before the parameter name.

The method parameter must be $id to match the variable used inside the method.

3fill in blank

hard

Fix the error in the controller method to correctly redirect to the 'home' route.

Laravel

public function redirectToHome() {
    return [1]('home');
}

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

Aview

BredirectTo

Credirect

Droute

Attempts:

3 left

💡 Hint

Common Mistakes

Using view instead of redirect causes the method to return a view, not a redirect.

Using route alone without redirect does not perform a redirect.

The redirect helper is used to send the user to another URL or route.

4fill in blank

hard

Fill both blanks to define a controller method that validates a request and stores a new user.

Laravel

public function store(Request $request) {
    $validated = $request->[1]([ 'email' => 'required|email' ]);
    User::[2]($validated);
    return redirect()->route('users.index');
}

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

Avalidate

Bsave

Ccreate

Dcheck

Attempts:

3 left

💡 Hint

Common Mistakes

Using save on the model class instead of an instance.

Using check which is not a Laravel method.

The validate method checks the request data. The create method saves a new user with the validated data.

5fill in blank

hard

Fill all three blanks to define a controller method that updates a user and redirects back with a success message.

Laravel

public function update(Request $request, User $user) {
    $data = $request->[1]([ 'name' => 'required' ]);
    $user->[2]($data);
    return redirect()->[3]('users.show', $user->id)->with('status', 'User updated!');
}

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

Avalidate

Bupdate

Croute

Dsave

Attempts:

3 left

💡 Hint

Common Mistakes

Using save instead of update on the model instance.

Using redirect()->route incorrectly without parameters.

The validate method checks the data, update changes the user record, and route generates the redirect URL.

Practice

1. What is the main purpose of a controller method (action) in Laravel?

easy

A. To handle a specific user request and return a response

B. To define database schema

C. To style the HTML output

D. To manage server configuration

Solution

1. Step 1: Understand controller role

   Controllers group related logic into methods called actions.

2. Step 2: Identify action purpose

   Each action handles a user request and returns a response like a view or JSON.

3. Final Answer:

   To handle a specific user request and return a response -> Option A

4. Quick Check:

   Controller action = handle request and respond [OK]

Hint: Controllers handle requests and responses, not styling or config [OK]

Common Mistakes:

• Confusing controller methods with database or styling tasks
• Thinking controllers manage server settings
• Assuming controllers only return views

2. Which of the following is the correct syntax to define a controller method named show in Laravel?

easy

A. function show() public { /* code */ }

B. public function show() { /* code */ }

C. public show function() { /* code */ }

D. def show() { /* code */ }

Solution

1. Step 1: Recall PHP method syntax

   In PHP, methods are defined with visibility, function keyword, name, and parentheses.

2. Step 2: Match Laravel controller method syntax

   Laravel uses PHP syntax: public function methodName() {}.

3. Final Answer:

   public function show() { /* code */ } -> Option B

4. Quick Check:

   PHP method = public function name() [OK]

Hint: Remember PHP method syntax: visibility + function + name() [OK]

Common Mistakes:

• Placing visibility after function keyword
• Using Python style def keyword
• Omitting parentheses after method name

3. Given this controller method in Laravel:

public function greet($name) {
    return "Hello, " . $name . "!";
}

What will be the output if called with $controller->greet('Anna')?

medium

A. "Hello, Anna!"

B. "Hello, $name!"

C. Error: Undefined variable

D. "Hello, !"

Solution

1. Step 1: Understand method parameter usage

   The method receives $name and concatenates it with strings.

2. Step 2: Substitute argument value

   Calling with 'Anna' replaces $name with 'Anna', so output is "Hello, Anna!".

3. Final Answer:

   "Hello, Anna!" -> Option A

4. Quick Check:

   Parameter value used in string = "Hello, Anna!" [OK]

Hint: Replace parameter with argument value to find output [OK]

Common Mistakes:

• Treating $name as literal string
• Expecting error due to missing variable
• Ignoring string concatenation

4. Identify the error in this Laravel controller method:

public function index()
{
    return view('welcome')
}

medium

A. View name should be capitalized

B. Incorrect method name

C. Missing semicolon after return statement

D. Missing parentheses in view() call

Solution

1. Step 1: Check PHP syntax in method

   PHP statements must end with a semicolon; here it is missing after return view('welcome').

2. Step 2: Validate other parts

   Method name and view call syntax are correct; view name case is not an error.

3. Final Answer:

   Missing semicolon after return statement -> Option C

4. Quick Check:

   PHP statements end with ; [OK]

Hint: Check for missing semicolons after return statements [OK]

Common Mistakes:

• Ignoring missing semicolon causing syntax error
• Thinking view names must be capitalized
• Assuming parentheses are missing in view()

5. You want to create a Laravel controller method that returns a JSON response with a user's name and email. Which method correctly does this?

public function userInfo()
{
    $user = ['name' => 'John', 'email' => '[e-mail]'];
    // Fill in the return statement
}

hard

A. return json($user);

B. return json_response($user);

C. return response->json($user);

D. return response()->json($user);

Solution

1. Step 1: Recall Laravel JSON response syntax

   Laravel uses response()->json() helper to return JSON responses.

2. Step 2: Check each option's syntax

   return response()->json($user); correctly calls response()->json($user);. Others are invalid or incorrect syntax.

3. Final Answer:

   return response()->json($user); -> Option D

4. Quick Check:

   Use response()->json() for JSON output [OK]

Hint: Use response()->json() helper to return JSON [OK]

Common Mistakes:

• Using undefined functions like json() or json_response()
• Missing parentheses or arrow operator in response call
• Confusing PHP syntax for method calls