If I input infoおおお@test.com as billing email address, automatically change to info@test.com by sanitize_email function.
So at first check the email address by is_email function, after that we must use sanitize_email function.
In case no tax rate is specified for the default catch-all tax rate, the tax rate was an empty string which caused a PHP notice when it was later used in arithmetic operations.
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* [x] Have you followed the [WooCommerce Contributing guideline](https://github.com/woocommerce/woocommerce/blob/master/.github/CONTRIBUTING.md)?
* [x] Does your code follow the [WordPress' coding standards](https://make.wordpress.org/core/handbook/best-practices/coding-standards/)?
* [x] Have you checked to ensure there aren't other open [Pull Requests](../../pulls) for the same update/change?
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### Changes proposed in this Pull Request:
Re-indexing `get_available_variations` method values.
Suppose you made changed with `woocommerce_available_variation` hook and skip returning some specific variation product with false value. There is `array_filter` function to filter empty values from `get_available_variations` but it keeps index which convert to js object rather then array on `single-product/add-to-cart/variable.php` template variation form `data-product_variations` attribute, and select box dropdown doesn't show. I just added `array_values` PHP function to reindex after `array_filter` function which convert to js array rather then js object before `get_available_variations` function return.
Closes # .
### How to test the changes in this Pull Request:
1. Before approving pull req just return false on a specific variation via `woocommerce_available_variation` filter.
2. Now check that variation product dropdown doesn't show. Because it needs to reindex array.
### Other information:
* [x] Have you added an explanation of what your changes do and why you'd like us to include them?
* [ ] Have you written new tests for your changes, as applicable?
* [x] Have you successfully ran tests with your changes locally?
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### Changelog entry
> Enter a short summary of all changes on this Pull Request. This will appear in the changelog if accepted.
This commit changes the travis codecoverage from using xdebug to phpdbg, phpdbg seems much faster and gives similar results.
Reason for switching is we have been running into constant timeouts on our codecoverage due to the 50min job limit on travis, which means our codecoverage has not been updated in a couple of months.
* Remove xdebug as it slows tests down, switch to using phpdbg for code coverage.
* Update parameters for phpdbg
* It is qrr not qqr
* Include vendor/bin path when using phpdbg
* Use PHP 7.1 to run phpdbg
* Update phpunit dire
* Include $HOME in phpdbg call to phpunit
* Set no memory limit to avoid out of memory errors.
* Assign timeout group to test_request_url test for paypal and do not execute that on coverage as it causes a memeory timeout. Test needs optimization to run for code coverage.
* @covers usage for methods should be prefixed with ::
Rodrigo Primo
Claudiu Lodromanean
Shohei Tanaka
Adrian Jagusch
Gerhard Potgieter
Peter Fabian
Kanishk
Claudio Sanches
LuigiPulcini
Khan M Rashedun-Naby
Emran Ahmed