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[Cookbook][External Parameters] Enhance content #4269

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Oct 15, 2014
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[Cookbook][External Parameters] Enhance content #4269

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18 changes: 15 additions & 3 deletions cookbook/configuration/external_parameters.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -14,9 +14,13 @@ Environment Variables
---------------------

Symfony will grab any environment variable prefixed with ``SYMFONY__`` and
set it as a parameter in the service container. Double underscores are replaced
with a period, as a period is not a valid character in an environment variable
name.
set it as a parameter in the service container. Some transformations are
applied to the resulting parameter name:

* ``SYMFONY__`` prefix is removed;
* Parameter name is lowercased;
* Double underscores are replaced with a period, as a period is not
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Is the comma needed?

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That was copied from the original text, any native speaker may clarify this?

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@weaverryan What do you think?

a valid character in an environment variable name.

For example, if you're using Apache, environment variables can be set using
the following ``VirtualHost`` configuration:
Expand Down Expand Up @@ -94,6 +98,14 @@ You can now reference these parameters wherever you need them.
)
));

.. note::

Even in debug mode, setting or changing an environment variable
requires your cache to be cleared to make the parameter available.
In debug mode, this is required since only a change to a configuration
file that is loaded by Symfony triggers your configuration to be
re-evaluated.

Constants
---------

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