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Laravel Form Validation Essentials

Jun 29, 2024

Laravel Form Validation

Client-Side and Server-Side Validation

  • Client-Side Validation: In JavaScript, hackers can bypass it.
  • Server-Side Validation: Hackers cannot bypass it, it is secure. Used in Laravel.

CSRF Token

  • First, pass the CSRF token in the form.
  • Important for server and client-side validation.

Using Form Validation

  1. Add User Function in Controller:
    • Use the Request class.
    • Use the validate method for field validation.
  2. Validation Rules:
    • required: Field is mandatory.
    • email: Must be a valid email address.
    • numeric: Value must be numeric.

Form HTML

  • Include the CSRF token.
  • Fields: User Name, Email, AGE, City (Select Box)
  • Submit Button: Submit the form.

Using Validation in Controller

public function addUser(Request $request) { $request->validate([ 'user_name' => 'required', 'user_email' => 'required|email', 'user_age' => 'required|numeric|min:18|max:65' ]); // Validation for maximum and minimum age }

Logging Errors

  • Print Errors: Use @errors->all().
  • Error Messages in Form:
    • @error('field_name') <div>{{ $message }}</div>@enderror

Custom Validation Messages

  • Define Custom Rules in the Third Parameter:
$request->validate([ 'user_name' => 'required', 'user_email' => 'required|email', 'user_password' => 'required|min:6|alpha_num' ], [ 'user_name.required' => 'User name is required', 'user_email.email' => 'Your email is not correct', // Other custom messages ]);

Available Validation Rules

File for Customization

  • Edit the lang/en/validation.php file to customize validation messages.

Useful Validation Rules for Reference

  • With Range:
    • min:XX, max:XX, between:XX,YY, confirmed (for password confirmation)
  • Error Message Customization:
    • 'attribute' => 'use a good name'

Tips

  • CSRF Token: Ensure to use the CSRF token in all forms.
  • Custom Messages in Validator: Personalize the errors.
  • Data Protection: Ensure validation of all important data.

Conclusion

  • Key differences between client and server-side validation.
  • Important validation rules in Laravel.
  • How to create custom error messages.
  • Use of all Laravel validation rules available in the documentation.

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