Custom error messages in Laravel - Mini Project: Build & Apply

Custom error messages in Laravel validation

📖 Scenario: You are building a simple Laravel form to collect user registration data. You want to make sure users get clear, friendly error messages if they enter invalid data.

🎯 Goal: Create a Laravel validation setup that uses custom error messages for the name and email fields.

📋 What You'll Learn

Create a validation rules array with name required and minimum 3 characters

Add a validation rule for email to be required and a valid email

Create a custom error messages array with specific messages for name.required, name.min, and email.email

Use the validate method with rules and custom messages in a controller method

💡 Why This Matters

🌍 Real World

Custom error messages help users understand exactly what is wrong with their input, improving user experience in web forms.

💼 Career

Knowing how to customize validation messages is a common task for Laravel developers building user-friendly applications.

1

Set up validation rules array

Create a variable called $rules as an array with these exact entries: 'name' => 'required|min:3' and 'email' => 'required|email'.

Laravel

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class RegisterController extends Controller
{
    public function store(Request $request)
    {
        // Create the validation rules array
        // Your code here
    }
}

Need a hint?

Use an associative array with keys 'name' and 'email' and string values for rules.

2

Add custom error messages array

Create a variable called $messages as an array with these exact entries: 'name.required' => 'Please enter your name.', 'name.min' => 'Name must be at least 3 characters.', and 'email.email' => 'Please enter a valid email address.'.

Laravel

 'required|min:3',
            'email' => 'required|email',
        ];
        // Create the custom error messages array
        // Your code here
    }
}

Need a hint?

Use an associative array with keys matching the rule names and values as the custom messages.

3

Apply validation with rules and messages

Use $request->validate() method with the variables $rules and $messages as arguments inside the store method.

Laravel

 'required|min:3',
            'email' => 'required|email',
        ];

        $messages = [
            'name.required' => 'Please enter your name.',
            'name.min' => 'Name must be at least 3 characters.',
            'email.email' => 'Please enter a valid email address.',
        ];
        // Validate the request with rules and messages
        // Your code here
    }
}

Need a hint?

Call $request->validate($rules, $messages); to apply validation with custom messages.

4

Complete the controller method

Add a return statement that redirects back with input using return redirect()->back()->withInput(); after validation to complete the method.

Laravel

 'required|min:3',
            'email' => 'required|email',
        ];

        $messages = [
            'name.required' => 'Please enter your name.',
            'name.min' => 'Name must be at least 3 characters.',
            'email.email' => 'Please enter a valid email address.',
        ];

        $request->validate($rules, $messages);
        // Add redirect back with input
        // Your code here
    }
}

Need a hint?

Use return redirect()->back()->withInput(); to send the user back to the form with their entered data.