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Commit67cc8ed

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minor#11148 Document the disallow_search_engine_index option (javiereguiluz)
This PR was merged into the master branch.Discussion----------Document the disallow_search_engine_index optionThis documentssymfony/symfony#30325.Commits-------a94b920 Document the disallow_search_engine_index option
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‎reference/configuration/framework.rst‎

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@@ -73,6 +73,7 @@ Configuration
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*:ref:`enabled<reference-csrf_protection-enabled>`
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* `default_locale`_
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* `disallow_search_engine_index`_
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* `esi`_
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*:ref:`enabled<reference-esi-enabled>`
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You can read more information about the default locale in
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:ref:`translation-default-locale`.
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disallow_search_engine_index
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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**type**: ``boolean`` **default**: ``true`` when the debug mode is enabled, ``false`` otherwise.
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..versionadded::4.3
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The ``disallow_search_engine_index`` option was introduced in Symfony 4.3.
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If ``true``, Symfony adds a ``X-Robots-Tag: noindex`` HTTP tag to all responses
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(unless your own app adds that header, in which case it's not modified). This
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`X-Robots-Tag HTTP header`_ tells search engines to not index your web site.
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This option is a protection measure in case you accidentally publish your site
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in debug mode.
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trusted_hosts
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~~~~~~~~~~~~~
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.. _`CSRF security attacks`:https://en.wikipedia.org/wiki/Cross-site_request_forgery
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.. _`session.sid_length PHP option`:https://php.net/manual/session.configuration.php#ini.session.sid-length
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.. _`session.sid_bits_per_character PHP option`:https://php.net/manual/session.configuration.php#ini.session.sid-bits-per-character
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.. _`X-Robots-Tag HTTP header`:https://developers.google.com/search/reference/robots_meta_tag

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