Why validation ensures data integrity in Laravel - See It in Action

Why validation ensures data integrity

📖 Scenario: You are building a simple Laravel form to collect user registration data. You want to make sure the data entered is correct and safe before saving it to the database.

🎯 Goal: Learn how to use Laravel validation to check user input and keep data accurate and consistent.

📋 What You'll Learn

Create an array with user input data

Add validation rules for the input data

Apply Laravel's Validator to check the data

Return validation errors if any exist

💡 Why This Matters

🌍 Real World

Forms on websites need validation to prevent wrong or harmful data from being saved.

💼 Career

Understanding Laravel validation is essential for backend developers to ensure data integrity and security.

1

DATA SETUP: Create user input data array

Create an array called $input with these exact keys and values: 'name' => 'Alice', 'email' => '[e-mail]', 'age' => 25.

Laravel

# Your code here

Need a hint?

Use a PHP array with keys 'name', 'email', and 'age' and assign the exact values.

2

CONFIGURATION: Define validation rules

Create an array called $rules with these exact validation rules: 'name' => 'required|string', 'email' => 'required|email', 'age' => 'required|integer|min:18'.

Laravel

$input = ['name' => 'Alice', 'email' => '[e-mail]', 'age' => 25];
# Your code here

Need a hint?

Define validation rules as strings for each input key.

3

CORE LOGIC: Apply Laravel Validator

Use Validator::make($input, $rules) to create a validator instance called $validator.

Laravel

$input = ['name' => 'Alice', 'email' => '[e-mail]', 'age' => 25];
$rules = ['name' => 'required|string', 'email' => 'required|email', 'age' => 'required|integer|min:18'];
# Your code here

Need a hint?

Use Laravel's Validator facade to check the input against the rules.

4

COMPLETION: Check validation and handle errors

Add an if statement to check $validator->fails() and inside it, return $validator->errors().

Laravel

$input = ['name' => 'Alice', 'email' => '[e-mail]', 'age' => 25];
$rules = ['name' => 'required|string', 'email' => 'required|email', 'age' => 'required|integer|min:18'];
$validator = Validator::make($input, $rules);
# Your code here

Need a hint?

Use the fails() method to check for errors and return them if found.