Symfony 7 Forms: The Basics

Forms power almost every user interaction in a web app. In this course, we’ll build a real form in a Symfony 7 project and explore the Form component from top to bottom - rendering, styling, validation, CSRF protection, and complex field logic. You’ll learn how Symfony turns raw user input into clean, validated data without the pain of manual handling.

By the end, you'll understand how Symfony Forms work under the hood and how to build fast, flexible, elegant form-driven features.

In this course, you’ll learn how to:

• Install and configure the Symfony Form component
• Build form types with Maker and map them to Doctrine entities
• Understand the difference between Form and FormView
• Render forms and fields using Twig’s helper functions
• Use form_start(), form_widget(), and form_end() to control form structure
• Style forms using Symfony’s built-in Tailwind form theme
• Add submit buttons in the template or as SubmitType fields
• Handle form submissions with $form->handleRequest()
• Save form data to the database with Doctrine
• Add flash messages on successful form submission
• Work with multiple submit buttons and detect which one was clicked
• Use built-in form field types and let Symfony guess types & options
• Explore available field types using the debug:form console command
• Configure and customize EntityType fields, including custom queries and labels
• Add HTML attributes like classes, IDs, and data attributes to fields
• Validate form data using Symfony Validator constraints
• Apply validation at both the form type and entity levels
• Use Tailwind v4’s new @source feature to compile classes from form themes