How to Create a Good and Secure Symfony Form

July 17th, 2017

Symfony // Grossum Possum

Symfony comprises of various PHP library components that are reusable in developing PHP-based web applications. Symfony provides an excellent framework for the effective creation of standard web applications and is among the top frameworks in the industry right now.

Creation and Application of Symfony Forms

Symfony is desirable for customizing forms and rendering them to the user. It is important to note that Symfony has greatly reduced the technicality associated with templating engines such as PHP and Twig. In practice, Symfony is comprised of endless components and unique features. On the contrary, Symfony is rampantly misused, especially in PHP engines hence resulting in numerous caught and uncaught Symfony form errors. Proper application of Symfony is crucial to enhance search engine results.

Getting started with Symfony is challenging and requires mastery of its fundamental features. Defining the form as a PHP class is important as it allows the user to build the required forms inside the controller code easily. This approach is particularly necessary when it is not necessary to reuse a web application. For cases where reusability is important, it is a good practice to define all of the necessary PHP classes for respective Symfony form types separately. This is especially the case for most organizational web applications.

Further, it is a good practice to place all form type classes inside the namespace of AppBundle\Form unless you are using other related form classes such as data transformers. The class createForm () is mainly required to pass the class name that is highly qualified.

  • Use AppBundle\Form\PostType

To cut down on Symfony form errors, you have to specify the phone type as a service. This is especially crucial in cases where dependencies are necessary for the form in question. On the contrary, specifying form type classes is not necessary for forms that do not have any dependencies.

Symfony Form Types and Data Handling

There are several Symfony form types designed purposely for web applications. Symfony provides its users with a range of fields for a web application using different standards. Various field types are created using ChoiceType and TextType functions.

The main supported field types include

  • Text fields
  • TextType
  • MoneyType
  • EmailType
  • TextareaType
  • IntegerType
  • Choice Fields
  • CurrencyType
  • TimezoneType
  • ChoiceType
  • Date and time fields
  • Hidden fields
  • Other fields
  • Base fields
  • Field Groups and Buttons.

Equally, Symfony form validation is very crucial in most web applications. Respective data entered into form requires appropriate validation before appending it to the database. Symfony provides superior tools for proper validation with transparency and convenience. Symfony validator is entirely based on JSR303 Bean Validation specification.

Additionally, various HTML attributes such as textarea and placeholders are vital in the application of Symfony. Textarea takes different attributes and options that include attr, which is an associative array in HTML language of web applications. This attribute is important when customizing widget classes. A placeholder, on the other hand, displays vital data in the textarea, a case in point is the data type, size or the required length.

With the aid of Symfony, designing an application registration form is overly easier. Registration forms created by Symfony are efficient in data handling that includes updating object in the database. Another data management feature popularly used along with Symfony is FOSUserBundle. Further, this program essentially provides both registration and password reset forms besides other related data management functionalities.

Symfony registration form is comprised of fields such as username, email, and password among others. A controller is also necessary to handle all of the registration form submissions. The controller validates and saves all of the information into the specified database. The class FormBuilder is a form builder for Symfony through proper implementation of FormBuilderInterface and IteratorAggregate.

Symfony offers its users with isClicked() method that lets them submit forms upon filling the textarea. Apparently, the use of multiple submit button options is possible making data handling and its management easier. Most important, Symfony allows its users to store and access stored data securely. Well-designed authentication processes are available for a login form with Symfony and other related security controllers.

Symfony Form is easy and convenient to use because of its customized components that allow the addition of fields and buttons. Simplicity and convenience are among the advantages that present Symfony forms. To build effective Symfony forms, the designer should apply only one action for both form submission and form rendering. Finally, Symfony is primarily helpful for running form-based web applications that are richly coupled with intense databases.

Need help with creating Symfony forms and developing other complex solutions?

Author: Grossum Possum

Grossum Possum. He loves using Symfony2 for his projects and learning to implement Symfony3. He also likes developing web and mobile applications using other programming languages and frameworks, such as PHP and Java. In his free time, Grossum Possum likes to write about his experiences in the blog.

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