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d6bae0ceda
The `$path` parameter of `load_script_textdomain()` had a default value of `null`, but would be passed onto the `untrailingslashit()` function without any input validation, even though the latter explicitly only expects/supports a string input.
This commit changes the default value for `$path` to an empty string, and adds an `is_string()` check before passing the value to `untrailingslashit()` to fix the issue at the point where the invalid input is incorrectly (not) validated.
Note: Changing the `untrailingslashit()` function is outside the scope of this commit.
Includes:
* Adding a dedicated unit test for this issue.
* Correcting the default value for `$path` from `null` to an empty string in a few related methods and functions:
* `WP_Dependency::set_translations()`
* `WP_Scripts::set_translations()`
* `wp_set_script_translations()`
* `load_script_textdomain()`
This fix also allows to remove a couple of calls to `expectDeprecation()` in unrelated tests.
Fixes an error when running the test suite:
{{{
4) Tests_Dependencies_Scripts::test_wp_external_wp_i18n_print_order
rtrim(): Passing null to parameter #1 ($string) of type string is deprecated
/var/www/src/wp-includes/formatting.php:2782
/var/www/src/wp-includes/l10n.php:1068
/var/www/src/wp-includes/class.wp-scripts.php:605
/var/www/src/wp-includes/class.wp-scripts.php:320
/var/www/src/wp-includes/class.wp-dependencies.php:136
/var/www/src/wp-includes/functions.wp-scripts.php:109
/var/www/tests/phpunit/tests/dependencies/scripts.php:1505
/var/www/tests/phpunit/includes/utils.php:436
/var/www/tests/phpunit/tests/dependencies/scripts.php:1507
/var/www/vendor/bin/phpunit:123
}}}
Follow-up to [44169], [44607], [51968].
Props jrf, ocean90, Chouby, swissspidy, lovor, iviweb, meysamnorouzi, DarkoG, oneearth27, SergeyBiryukov.
Fixes #55967. See #55656.
git-svn-id: https://develop.svn.wordpress.org/trunk@54349 602fd350-edb4-49c9-b593-d223f7449a82
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