Tonya Mork 0d39c0aa1e I18N: Initialize WP_Locale array properties.
Initializing the `WP_Locale` array properties to an empty array at the class definition point. Why?

* Ensure the properties initialize to an `array` data type at instantiation (rather than `null`).

This initialization is needed to ensure the properties are not `null` if another class inherits from `WP_Locale` but does not run `WP_Locale::init()` from the constructor. In this case, the initialization prevents

{{{
Warning: array_values() expects parameter 1 to be array, null given
}}}

when Core uses any of the properties.

* Good design practice.

The code and documentation are clearly expecting these properties to be an `array` data type. Setting each to a default `array()` state further helps to clearly communicate the code design.

Follow-up to [37889], [36292], [31078], [3676], [6589].

Props tyxla, SergeyBiryukov, azaozz, hellofromTonya, mukesh27.
See #57427.

git-svn-id: https://develop.svn.wordpress.org/trunk@55047 602fd350-edb4-49c9-b593-d223f7449a82
2023-01-10 13:59:00 +00:00
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