[Locale] added more information to the README.md regarding the need to build the ICU data when the intl extension ICU data version mismatch the one shipped with Symfony
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@ -23,10 +23,14 @@ You can run the unit tests with the following command:
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If your PHP have the ``intl`` extension enabled but the intl extension ICU data
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version mismatch the one shipped with the component, you can build the data for
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it and use the ``USE_INTL_ICU_DATA_VERSION`` environment variable:
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it and use the ``USE_INTL_ICU_DATA_VERSION`` environment variable.
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php Resources/data/build-data.php
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export USE_INTL_ICU_DATA_VERSION=true
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phpunit
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This way the tests will use the ICU data files with the same version of your
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``intl`` extension.
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Read the file ``Resources/data/UPDATE.txt`` for more info about building or
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updating the ICU data files.
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