Templates are loaded in the application using a Twig template loader , which also provides a method to check for template existence. First, get the loader:. Then, pass the path of the Twig template to the exists method of the loader:.
Creating and Using Templates
The lint:twig command checks that your Twig templates don't have any syntax errors. It's useful to run it before deploying your application to production e. The debug:twig command lists all the information available about Twig functions, filters, global variables, etc. It's useful to check if your custom Twig extensions are working properly and also to check the Twig features added when installing packages :.
This function is useful to inspect the contents of any variable and you can use it in Twig templates too. If you try to use it in the prod environment, you will see a PHP error. If certain Twig code is repeated in several templates, you can extract it into a single "template fragment" and include it in other templates. Imagine that the following code to display the user information is repeated in several places:. The include Twig function takes as argument the path of the template to include.
You can also pass variables to the included template. This is useful for example to rename variables.
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Use the following to rename the variable:. Including template fragments is useful to reuse the same content on several pages. However, this technique is not the best solution in some cases. Imagine that the template fragment displays the three most recent blog articles.
To do that, it needs to make a database query to get those articles. When using the include function, you'd need to do the same database query in every page that includes the fragment. This is not very convenient. A better alternative is to embed the result of executing some controller with the render and controller Twig functions. When using the controller function, controllers are not accessed using a regular Symfony route but through a special URL used exclusively to serve those template fragments.
Configure that special URL in the fragments option:. Embedding controllers require making requests to those controllers and rendering some templates as result. This can have a significant impact in the application performance if you embed lots of controllers. If possible, cache the template fragment. As your application grows you'll find more and more repeated elements between pages, such as headers, footers, sidebars, etc. Including templates and embedding controllers can help, but when pages share a common structure, it's better to use inheritance. The concept of Twig template inheritance is similar to PHP class inheritance.
You define a parent template that other templates can extend from and child templates can override parts of the parent template. Symfony recommends the following three-level template inheritance for medium and complex applications:. The Twig block tag defines the page sections that can be overridden in the child templates.
They can be empty, like the body block or define a default content, like the title block, which is displayed when child templates don't override them. The template extends from base. The rest of the parent template blocks will display their default contents.
To prevent this attack, use "output escaping" to transform the characters which have special meaning e. Symfony applications are safe by default because they perform automatic output escaping thanks to the Twig autoescape option :. If you are rendering a variable that is trusted and contains HTML contents, use the Twig raw filter to disable the output escaping for that variable:. Read the Twig output escaping docs to learn more about how to disable output escaping for a block or even an entire template. Use the twig. Each path is defined as a key: value pair where the key is the template directory and the value is the Twig namespace, which is explained later:.
When rendering a template, Symfony looks for it first in the twig. Deprecated since version 4. But that behavior is deprecated since Symfony 4.
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Using the above configuration, if your application renders for example the layout. Twig solves this problem with namespaces , which group several templates under a logic name unrelated to their actual location. Update the previous configuration to define a namespace for each template directory:.
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Now, if you render the layout. A single Twig namespace can be associated with more than one template directory. In that case, the order in which paths are added is important because Twig will start looking for templates from the first defined path. To avoid messing with your own templates, Symfony adds bundle templates under an automatic namespace created after the bundle name. For example, the templates of a bundle called AcmeFooBundle are available under the AcmeFoo namespace. You can also override bundle templates in case you want to change some parts of the original bundle templates.
Talks Workshops Register. Maintained 4. Even if it's the first time you see Twig, you probably understand most of it: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Consider the following template: 1. Consider the following routing configuration: Annotations 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 First, install the asset package: 1. I finally came up with this solution, others have similar solutions, but they where not working for me. The following function taken from PHP Cookbook 2, returns an associative array of a row in the resultset, place in while loop to iterate through whole result set.
This function uses the same idea as the last, but instead binds the fields to a given array.
Therefore it is not the best idea ot use binding of parameters whenever fetching big data. Because once the data is in the mysql result set stored in memory and then second time in the PHP variable. Swapping the following code makes for a more elegant and faster solution. Combind both ideas from Bruce Martin and dan, I come up with this code. It will return an assoc array. Unfortunately I couldn't find a solution.