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When `m` query_tag has a valid year, i.e. `?m=2021`, and there are posts for that year, `substr()` returns a `false` on PHP 5.6 and an empty string on PHP 7.0+. Passing either of those values to `$wp_locale->get_month()` results in a PHP notice on PHP 5.6 to PHP 7.4 and a PHP Warning on PHP 8.0+. Why? The `$month` lookup table has zeroized keys from '01' to '12'. A empty value is passed to `zeroise()` returns `'00'` which is directly passed as a key in the month property. That key does not exist. While `$wp_locale->get_month()` would benefit from guarding/validation, this fix ensures a falsey value is not passed as a month. Tests are added including a test that fails with this fix not applied. Follow-up to [801], [35294], [35624]. Props antpb, audrasjb, costdev, davidmosterd, drewapicture, herregroen, hellofromTonya, michelwppi, sergeybiryukov. Fixes #31521. git-svn-id: https://develop.svn.wordpress.org/trunk@52136 602fd350-edb4-49c9-b593-d223f7449a82 |
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| paginateLinks.php | ||
| template_CheckedSelectedHelper.php | ||
| template.php | ||
| wpError.php | ||
| wpGetArchives.php | ||
| wpGetDocumentTitle.php | ||
| wpResourceHints.php | ||
| wpTitle.php | ||