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Found a typo or an error? Want to improve teig option handel document? Need support or have a technical question? Ask support on Stack Overflow. This chapter describes the API to Twig and not the template language. It will be most useful as reference to those implementing the template interface to the application and not those who are creating Twig templates. Instances of this class are used to store the configuration and teig option handel, and are used to load templates from the file system or other teig option handel.

In some cases it's however useful to have multiple environments side by side, if different configurations are in use. The simplest way to configure Twig to load templates for your application looks roughly like this:. Different loaders are available and you can also write your own if you want to load templates from a database or other resources. Notice that the second argument of the environment is an array of options. The cache option is a compilation cache directory, where Twig caches the compiled templates to avoid the parsing phase for sub-sequent requests.

It is very different from the cache you might want to add for the evaluated templates. For such a need, you can use any available PHP cache library. To render the template with some variables, call the render method:. The display method is a shortcut to output the template directly. If a template defines blocks, they can be rendered individually via the renderBlock call:. An absolute path where to store the compiled templates, or false to disable caching which is the default.

When developing with Twig, it's useful to recompile the template whenever the source code changes. When set to trueTwig throws an exception instead default to false.

The name escaping strategy determines the escaping strategy to use for a template based on the template teig option handel extension this strategy does not incur any overhead at runtime as auto-escaping is done at compilation time.

A flag that indicates teig option handel optimizations to apply default to -1 -- all optimizations are enabled; set it to 0 teig option handel disable. All template teig option handel can cache the compiled templates on the filesystem for future reuse.

It speeds up Twig a lot as templates are only compiled once; and the performance boost is even larger if you use a PHP accelerator such as APC. This loader can find templates in folders on the file system and is the preferred way to load them:. You can add or prepend paths via the addPath and prependPath methods:. The filesystem loader also supports namespaced templates. This allows to group your templates under different namespaces which have their own template paths.

When using the setPathsaddPathand prependPath methods, specify the namespace as the second argument when not specified, these methods act on the "main" namespace:. Using relative paths is preferred as it makes the cache keys teig option handel of the project root directory for instance, it allows warming the cache from a build server where the directory might be different from the one used on production servers:. When not passing the root path as a second argument, Twig uses getcwd teig option handel relative paths.

It's passed an array of strings bound to template names:. This loader is very useful for unit testing. It can also teig option handel used for small projects where storing all templates in a single PHP file might make sense. When using the Array loader with a cache mechanism, you should know that a new cache key is generated each time a template content "changes" the cache key being the source code of the template.

If you don't want to see your teig option handel grows out of control, you need to take care of clearing the old cache file by yourself. When looking for a template, Twig will try each loader in turn and it will return as soon as the template is found. When rendering the index.

You can also add loaders via the addLoader method. The isFresh method must return true if the current cached template is still fresh, given the last modification time, or false otherwise.

Twig extensions are packages that add new features to Twig. Using an extension is as simple as using the addExtension method:.

The core, escaper, and optimizer extensions do not need to be added to the Twig environment, as teig option handel are registered by default. The escaper extension adds automatic output escaping to Twig. It defines a tag, autoescapeand a filter, raw. When creating the escaper extension, you can switch on or off the global output escaping strategy:. If set to htmlall variables in templates are escaped using the html escaping strategyexcept those teig option handel the raw filter:. You can also change the escaping mode locally by using the autoescape tag:.

The autoescape tag has no effect on included files. Literals integers, booleans, arrays, Expressions which the result is always a literal or a variable marked safe are never automatically escaped:. Automatic escaping is not applied if the last teig option handel in the chain is marked safe for the current context e.

Note that autoescaping has some limitations as escaping is applied on expressions after evaluation. The sandbox extension can be used to evaluate teig option handel code.

Access to unsafe attributes and methods is prohibited. The sandbox security is managed by a policy instance. By default, Twig comes with one policy class: This class allows you to white-list some tags, filters, properties, and methods:. With the previous configuration, the security policy will only allow usage of teig option handel if tag, and the upper filter. Moreover, the templates will only be able to call the getTitle and getBody methods on Article objects, and the title and body public properties.

By default, the sandbox mode is disabled and should be enabled when including untrusted template code by using the sandbox tag:. You can sandbox all templates by passing true as the second argument of the extension constructor:. The profiler extension enables a profiler for Twig templates; it should only be used on your development machines as it adds some overhead:. A profile contains information about time and memory consumption for template, block, and macro executions.

You can also dump the data in a Blackfire. Upload the profile to visualize it create a free account teig option handel.

The optimizer extension optimizes the node tree before compilation:. By default, all optimizations are turned on. You can select the ones you want to enable by passing them to the constructor:.

You are reading the documentation for Twig 2. Switch to the documentation for Twig 1. Twig documentation is licensed under the new BSD license. The simplest way to configure Twig to load templates for your application looks roughly like this: Note Notice that the second argument of the environment is an teig option handel of options.

Note The display method is a shortcut to output the template directly. This loader can find templates in folders on the file system and is the preferred way to load them: Note When not passing the root path as a second argument, Twig uses getcwd for teig option handel paths. It's passed an array of strings bound teig option handel template names: Tip When using the Array loader with a cache mechanism, you teig option handel know that a new cache key is generated each time a template content "changes" the cache key being the source code of the template.

Note You can also add loaders via the addLoader method. Using an extension is as simple as using the addExtension method: Tip Read the chapter about extending Teig option handel to learn how to create your own extensions. Tags ; Filters ; Functions ; Tests.

When creating the escaper extension, you can switch on or off the global output escaping strategy: Warning The autoescape tag has no effect on included files. Note Note that autoescaping has some limitations as escaping is applied on expressions after evaluation. This class allows you to white-list some tags, filters, properties, and methods: The base exception for teig option handel errors.

Thrown to tell the user that there is a problem with the template syntax. Thrown when an error occurs at runtime when a filter does not exist for instance. Thrown when an error occurs during template loading. Thrown when an unallowed tag, filter, or method is called in a sandboxed template.

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