Sergey Biryukov 56d4e7fb86 Date/Time: Restore the previous behavior of date_i18n() where invalid input would result in current time.
Make `wp_date()` return `false` on invalid timestamp input, for consistency with upstream PHP `date()` function.

Props Rarst.
Fixes #28636.

git-svn-id: https://develop.svn.wordpress.org/trunk@45914 602fd350-edb4-49c9-b593-d223f7449a82
2019-08-29 23:17:30 +00:00
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