Framework Configuration (“framework”)¶
This reference document is a work in progress. It should be accurate, but all options are not yet fully covered.
The core of the PPI Framework can be configured under the framework
key in your application configuration.
This includes settings related to sessions, translation, routing and more.
Configuration¶
session¶
cookie_lifetime¶
type: integer
default: 0
This determines the lifetime of the session - in seconds. By default it will use
0
, which means the cookie is valid for the length of the browser session.
cookie_path¶
type: string
default: /
This determines the path to set in the session cookie. By default it will use /
.
cookie_domain¶
type: string
default: ''
This determines the domain to set in the session cookie. By default it’s blank, meaning the host name of the server which generated the cookie according to the cookie specification.
cookie_secure¶
type: Boolean
default: false
This determines whether cookies should only be sent over secure connections.
cookie_httponly¶
type: Boolean
default: false
This determines whether cookies should only accessible through the HTTP protocol. This means that the cookie won’t be accessible by scripting languages, such as JavaScript. This setting can effectively help to reduce identity theft through XSS attacks.
gc_probability¶
New in version 2.1: The gc_probability
option is new in version 2.1
type: integer
default: 1
This defines the probability that the garbage collector (GC) process is started
on every session initialization. The probability is calculated by using
gc_probability
/ gc_divisor
, e.g. 1/100 means there is a 1% chance
that the GC process will start on each request.
gc_divisor¶
New in version 2.1: The gc_divisor
option is new in version 2.1
type: integer
default: 100
See gc_probability.
gc_maxlifetime¶
New in version 2.1: The gc_maxlifetime
option is new in version 2.1
type: integer
default: 14400
This determines the number of seconds after which data will be seen as “garbage” and potentially cleaned up. Garbage collection may occur during session start and depends on gc_divisor and gc_probability.
save_path¶
type: string
default: %app.cache.dir%/sessions
This determines the argument to be passed to the save handler. If you choose
the default file handler, this is the path where the files are created. You can
also set this value to the save_path
of your php.ini
by setting the
value to null
:
- YAML
# app/config/app.yml framework: session: save_path: null
- PHP
// app/config/app.php return array( 'framework' => array( 'session' => array( 'save_path' => null, ), ));
templating¶
assets_base_urls¶
default: { http: [], ssl: [] }
This option allows you to define base URLs to be used for assets referenced
from http
and ssl
(https
) pages. A string value may be provided in
lieu of a single-element array. If multiple base URLs are provided, PPI2
will select one from the collection each time it generates an asset’s path.
For your convenience, assets_base_urls
can be set directly with a string or
array of strings, which will be automatically organized into collections of base
URLs for http
and https
requests. If a URL starts with https://
or
is protocol-relative (i.e. starts with //) it will be added to both
collections. URLs starting with http://
will only be added to the
http
collection.
New in version 2.1: Unlike most configuration blocks, successive values for assets_base_urls
will overwrite each other instead of being merged. This behavior was chosen
because developers will typically define base URL’s for each environment.
Given that most projects tend to inherit configurations
(e.g. config_test.yml
imports config_dev.yml
) and/or share a common
base configuration (i.e. app.yml
), merging could yield a set of base
URL’s for multiple environments.
assets_version¶
type: string
This option is used to bust the cache on assets by globally adding a query
parameter to all rendered asset paths (e.g. /images/logo.png?v2
). This
applies only to assets rendered via the Twig asset
function (or PHP equivalent)
as well as assets rendered with Assetic.
For example, suppose you have the following:
- Twig
<img src="{{ asset('images/logo.png') }}" alt="PPI!" />
- PHP
<img src="<?php echo $view['assets']->getUrl('images/logo.png') ?>" alt="PPI!" />
By default, this will render a path to your image such as /images/logo.png
.
Now, activate the assets_version
option:
- YAML
# app/config/app.yml framework: # ... templating: { engines: ['twig'], assets_version: v2 }
- PHP
// app/config/app.php return array( 'framework' => array( ..., 'templating' => array( 'engines' => array('twig'), 'assets_version' => 'v2', ), ));
Now, the same asset will be rendered as /images/logo.png?v2
If you use
this feature, you must manually increment the assets_version
value
before each deployment so that the query parameters change.
You can also control how the query string works via the assets_version_format option.
assets_version_format¶
type: string
default: %%s?%%s
This specifies a sprintf pattern that will be used with the assets_version
option to construct an asset’s path. By default, the pattern adds the asset’s
version as a query string. For example, if assets_version_format
is set to
%%s?version=%%s
and assets_version
is set to 5
, the asset’s path
would be /images/logo.png?version=5
.
Note
All percentage signs (%
) in the format string must be doubled to escape
the character. Without escaping, values might inadvertently be interpreted
as a service parameter.
Tip
Some CDN’s do not support cache-busting via query strings, so injecting the
version into the actual file path is necessary. Thankfully, assets_version_format
is not limited to producing versioned query strings.
The pattern receives the asset’s original path and version as its first and
second parameters, respectively. Since the asset’s path is one parameter, you
cannot modify it in-place (e.g. /images/logo-v5.png
); however, you can
prefix the asset’s path using a pattern of version-%%2$s/%%1$s
, which
would result in the path version-5/images/logo.png
.
URL rewrite rules could then be used to disregard the version prefix before serving the asset. Alternatively, you could copy assets to the appropriate version path as part of your deployment process and forgo any URL rewriting. The latter option is useful if you would like older asset versions to remain accessible at their original URL.
Full Default Configuration¶
- YAML
framework: # router configuration router: resource: ~ # Required type: ~ http_port: 80 https_port: 443 # set to true to throw an exception when a parameter does not match the requirements # set to false to disable exceptions when a parameter does not match the requirements (and return null instead) # set to null to disable parameter checks against requirements # 'true' is the preferred configuration in development mode, while 'false' or 'null' might be preferred in production strict_requirements: true # session configuration session: storage_id: session.storage.native handler_id: session.handler.native_file name: ~ cookie_lifetime: ~ cookie_path: ~ cookie_domain: ~ cookie_secure: ~ cookie_httponly: ~ gc_divisor: ~ gc_probability: ~ gc_maxlifetime: ~ save_path: %app.cache_dir%/sessions # templating configuration templating: assets_version: ~ assets_version_format: %%s?%%s assets_base_urls: http: [] ssl: [] cache: ~ engines: # Required # Example: - twig loaders: [] packages: # Prototype name: version: ~ version_format: %%s?%%s base_urls: http: [] ssl: [] # translator configuration translator: enabled: false fallback: en