![]() ![]() Symfony ships with a lot of helpers for various purposes, but if you don't find what you need in the API documentation, you will probably want to create a new helper. The best reference for helpers is the online ( where all the helpers are well documented, with their syntax, options, and examples. There are many other helpers in symfony, and it would take a full book to describe all of them. => click me // Depends on the routing settings // Asset group Consequently, they don't even appear in the list of standard helpers. You cannot remove the first four helper groups in the preceding list ( Helper, Tag, Url, and Asset), because they are compulsory for the templating engine to work properly. This will speed up your application a bit. ![]() So if you know that you will not use the helpers of the Cache group, or that you will always use the ones of the Text group, modify the standard_helpers setting accordingly. The list of the standard helpers, loaded by default for every template, is configurable in the settings.yml file. Cache: Manipulation of cached code fragments.Partial: Helpers allowing for inclusion of template fragments.Asset: Helpers populating the HTML section, and providing easy links to external assets (images, JavaScript, and style sheet files).Tag: Basic tag helper, used by almost every helper. ![]() Helper: Required for helper inclusion (the use_helper() function is, in fact, a helper itself).These are helpers of the following helper groups: Ī few helpers are available by default in every template, without need for declaration. For instance, to load both the Text and the Javascript helper groups in a template, call. If you need to declare more than one helper group, add more arguments to the use_helper() call. For instance, you can easily imagine the function definition for this helper: Sometimes, helpers are just time-savers, packaging code snippets frequently used in templates. In Listing 7-1, the link_to() function is a helper. Helpers are PHP functions that return HTML code and can be used in templates. Keeping the logic inside the action also makes it easier to have several templates for a single action, without any code duplication. You should keep PHP code to a minimum in templates, since these files are the ones used to design the GUI of the application, and are sometimes created and maintained by another team, specialized in presentation but not in application logic. Listing 7-1 - A Sample indexSuccess.php TemplateĪs explained in Chapter 4, the alternative PHP syntax is preferable for templates to make them readable for non-PHP developers. It contains some HTML code and some basic PHP code, usually calls to variables defined in the action (via $this->name = 'foo' ) and helpers. Listing 7-1 shows a typical symfony template. When dealing with variables in the templates, the risks of cross-site scripting must not be ignored, and a good comprehension of output escaping techniques is required to safely record user data.īut whatever your role is, you will find useful tools to speed up the tedious job of presenting the results of the action. Developers focus on the YAML view configuration file (setting the properties of the response and other interface elements) and on the response object.Web designers can work on these template fragments as well. They use slots to affect more than one zone of the layout. For reusability, developers usually package template code fragments into partials or components.These are written in HTML with small embedded chunks of PHP, which are mostly calls to helpers. Web designers generally work on the templates (the presentation of the current action data) and on the layout (containing the code common to all pages). ![]() In symfony, the view consists of several parts, with each part designed to be easily modified by the person who usually works with it. The view is responsible for rendering the output correlated to a particular action. ![]()
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