Update BaseArrayHelper.php

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Fixes #6589: updated code style guide to mention else after return, adjusted code involved in the issue

[skip ci] fix left over closing backticks

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Fixes #6648: Added explicit type casting to avoid dblib issues on SQL Server 2014

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Fixes #6632: `yii\di\Container::get()` did not handle config parameter correctly when it is passed as a constructor parameter

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