Echoing data with {{ }} in Laravel - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the output of this Blade template?

Consider the following Blade template snippet:

<p>Hello, {{ $name }}!</p>

If the variable $name is set to "Alice", what will be rendered in the browser?

Laravel

<p>Hello, {{ $name }}!</p>

A <p>Hello, $name!</p>

B <p>Hello, {{ $name }}!</p>

C <p>Hello, </p>

D <p>Hello, Alice!</p>

💡 Hint

Remember that {{ }} in Blade templates outputs the value of the variable.

The Blade syntax {{ $name }} outputs the value of the variable $name, which is 'Alice'. So the rendered HTML will be

Hello, Alice!

.

📝 Syntax

intermediate

Which Blade syntax correctly escapes HTML?

Given the variable $content contains the string <script>alert('Hi')</script>, which Blade syntax will safely display the string as text without running the script?

A @{{ $content }}

B {!! $content !!}

C {{ $content }}

D {{{ $content }}}

💡 Hint

Blade's {{ }} syntax escapes HTML by default.

Using {{ $content }} escapes HTML tags, so the script tags will be shown as text, preventing script execution. {!! $content !!} outputs raw HTML, which is unsafe here.

🔧 Debug

advanced

Why does this Blade template show raw PHP code instead of output?

This Blade template code:

<p>User: {{ $user->name }}</p>

renders as:

<p>User: {{ $user->name }}</p>

What is the most likely cause?

Laravel

<p>User: {{ $user->name }}</p>

A The Blade template file is saved with a .php extension instead of .blade.php

B The $user variable is null

C The $user->name property is empty string

D The Blade compiler cache is corrupted

💡 Hint

Blade templates must have the correct file extension to be compiled.

If the file is not named with .blade.php extension, Laravel will not compile Blade syntax and will output it as plain text.

❓ state_output

advanced

What is the output when a variable is not set in Blade?

Given this Blade snippet:

<p>Status: {{ $status }}</p>

and the variable $status is not passed to the view, what will be the rendered output?

Laravel

<p>Status: {{ $status }}</p>

A <p>Status: null</p>

B <p>Status: </p>

C An error is thrown about undefined variable

D <p>Status: {{ $status }}</p>

💡 Hint

Blade treats undefined variables as empty strings when echoing.

Blade outputs an empty string for undefined variables inside {{ }}, so the output is

Status:

without error.

🧠 Conceptual

expert

Which Blade syntax prevents XSS by escaping output?

You want to display user input safely in a Blade template to prevent Cross-Site Scripting (XSS). Which syntax should you use?

A {{ $userInput }}

B {!! $userInput !!}

C @php echo $userInput; @endphp

D <script>{{ $userInput }}</script>

💡 Hint

Blade's double curly braces escape HTML by default.

Using {{ $userInput }} escapes HTML special characters, preventing scripts from running. {!! !!} outputs raw HTML, which is unsafe for user input.

Practice

1. What does the {{ }} syntax do in a Laravel Blade template?

easy

A. It displays data safely by escaping HTML characters.

B. It runs PHP code without showing any output.

C. It comments out the code inside it.

D. It includes another Blade template file.

Solution

1. Step 1: Understand Blade syntax purpose

   The {{ }} syntax is used to show data inside Blade templates.

2. Step 2: Recognize automatic HTML escaping

   Laravel automatically escapes HTML inside {{ }} to protect from security issues.

3. Final Answer:

   It displays data safely by escaping HTML characters. -> Option A

4. Quick Check:

   Echoing data with escaping = A [OK]

Hint: Remember {{ }} always escapes output for safety [OK]

Common Mistakes:

• Thinking {{ }} runs PHP code directly
• Assuming {{ }} includes files
• Confusing {{ }} with comments

2. Which of the following is the correct way to display a variable named $name in a Blade template?

easy

A. @php echo $name; @endphp

B. {{ $name }}

C. {!! $name !!}

D. @include('name')

Solution

1. Step 1: Identify Blade echo syntax

   To display a variable safely, Blade uses {{ $variable }}.

2. Step 2: Compare options

   {{ $name }} uses {{ $name }}, which is the correct Blade syntax for echoing variables.

3. Final Answer:

   {{ $name }} -> Option B

4. Quick Check:

   Variable display uses {{ }} = D [OK]

Hint: Use {{ $variable }} to show variables safely [OK]

Common Mistakes:

• Using raw PHP tags instead of Blade syntax
• Using {!! !!} which does not escape HTML
• Trying to include variable as a template

3. Given the Blade code: <p>Hello, {{ $user->name }}!</p> and $user->name = '<strong>Alice</strong>', what will be the rendered HTML output?

medium

A. Hello, <strong>Alice</strong>!

B. Hello, Alice!

C. Hello, {{ $user->name }}!

D. Hello, <em>Alice</em>!

Solution

1. Step 1: Understand Blade escaping

   The {{ }} syntax escapes HTML tags, so <strong> will show as text, not bold.

2. Step 2: Predict output

   The output will show the tags as escaped text: <strong>Alice</strong>.

3. Final Answer:

   <p>Hello, <strong>Alice</strong>!</p> -> Option A

4. Quick Check:

   Escaped HTML output = B [OK]

Hint: {{ }} escapes HTML tags, so tags show as text [OK]

Common Mistakes:

• Expecting HTML tags to render inside {{ }}
• Confusing with {!! !!} which does not escape
• Ignoring object property access

4. What is wrong with this Blade code snippet? <p>User: {{ $user->name }}</p>

medium

A. The arrow operator is incorrect; it should be -> not ->.

B. The variable $user is not defined, causing an error.

C. The Blade syntax {{ }} cannot access object properties.

D. There is no error; the code is correct.

Solution

1. Step 1: Check syntax correctness

   The arrow operator -> is correctly written as -> in HTML to represent ->.

2. Step 2: Verify Blade property access

   Blade supports accessing object properties inside {{ }} syntax.

3. Final Answer:

   There is no error; the code is correct. -> Option D

4. Quick Check:

   Proper property access in Blade = A [OK]

Hint: HTML encodes -> as ->; Blade handles it correctly [OK]

Common Mistakes:

• Thinking -> is a syntax error in Blade
• Assuming {{ }} can't access object properties
• Not defining $user variable (not shown here)

5. You want to display a user's bio that may contain HTML tags safely in a Blade template. Which is the best way to do this?

hard

A. @php echo $user->bio; @endphp without escaping.

B. {!! $user->bio !!} to render HTML tags as HTML.

C. {{ $user->bio }} to escape HTML tags.

D. {{ htmlspecialchars($user->bio) }} inside Blade.

Solution

1. Step 1: Understand security risks

   Displaying user input with HTML tags can cause security issues if not escaped.

2. Step 2: Choose safe display method

   Using {{ $user->bio }} escapes HTML tags, preventing harmful scripts.

3. Final Answer:

   {{ $user->bio }} to escape HTML tags. -> Option C

4. Quick Check:

   Safe display with escaping = C [OK]

Hint: Use {{ }} to escape user input and avoid XSS [OK]

Common Mistakes:

• Using {!! !!} which renders raw HTML and risks XSS
• Using raw PHP echo without escaping
• Manually calling htmlspecialchars inside Blade