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Code Modernization: Use correct default value for JavaScript translat…
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…ions path.

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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SergeyBiryukov committed Sep 28, 2022
1 parent 7fed5be commit d6bae0c
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Showing 3 changed files with 24 additions and 22 deletions.
7 changes: 5 additions & 2 deletions src/wp-includes/l10n.php
Original file line number Diff line number Diff line change
Expand Up @@ -1058,14 +1058,17 @@ function load_child_theme_textdomain( $domain, $path = false ) {
* @return string|false The translated strings in JSON encoding on success,
* false if the script textdomain could not be loaded.
*/
function load_script_textdomain( $handle, $domain = 'default', $path = null ) {
function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
$wp_scripts = wp_scripts();

if ( ! isset( $wp_scripts->registered[ $handle ] ) ) {
return false;
}

$path = untrailingslashit( $path );
if ( is_string( $path ) ) {
$path = untrailingslashit( $path );
}

$locale = determine_locale();

// If a path was given and the handle file exists simply return it.
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20 changes: 0 additions & 20 deletions tests/phpunit/tests/dependencies/scripts.php
Original file line number Diff line number Diff line change
Expand Up @@ -721,16 +721,6 @@ public function test_wp_add_inline_script_before_after_concat_with_core_dependen
$wp_scripts->base_url = '';
$wp_scripts->do_concat = true;

if ( PHP_VERSION_ID >= 80100 ) {
/*
* For the time being, ignoring PHP 8.1 "null to non-nullable" deprecations coming in
* via hooked in filter functions until a more structural solution to the
* "missing input validation" conundrum has been architected and implemented.
*/
$this->expectDeprecation();
$this->expectDeprecationMessageMatches( '`Passing null to parameter \#[0-9]+ \(\$[^\)]+\) of type [^ ]+ is deprecated`' );
}

$ver = get_bloginfo( 'version' );
$suffix = wp_scripts_get_suffix();
$expected = "<script type='text/javascript' src='/wp-admin/load-scripts.php?c=0&amp;load%5Bchunk_0%5D=jquery-core,jquery-migrate,regenerator-runtime,wp-polyfill,wp-dom-ready,wp-hooks&amp;ver={$ver}'></script>\n";
Expand Down Expand Up @@ -783,16 +773,6 @@ public function test_wp_add_inline_script_customize_dependency() {
$wp_scripts->base_url = '';
$wp_scripts->do_concat = true;

if ( PHP_VERSION_ID >= 80100 ) {
/*
* For the time being, ignoring PHP 8.1 "null to non-nullable" deprecations coming in
* via hooked in filter functions until a more structural solution to the
* "missing input validation" conundrum has been architected and implemented.
*/
$this->expectDeprecation();
$this->expectDeprecationMessageMatches( '`Passing null to parameter \#[0-9]+ \(\$[^\)]+\) of type [^ ]+ is deprecated`' );
}

$expected_tail = "<script type='text/javascript' src='/customize-dependency.js' id='customize-dependency-js'></script>\n";
$expected_tail .= "<script type='text/javascript' id='customize-dependency-js-after'>\n";
$expected_tail .= "tryCustomizeDependency()\n";
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19 changes: 19 additions & 0 deletions tests/phpunit/tests/l10n/loadScriptTextdomain.php
Original file line number Diff line number Diff line change
Expand Up @@ -131,4 +131,23 @@ public function relative_path_from_cdn( $relative, $src ) {

return $relative;
}

/**
* Tests that PHP 8.1 "passing null to non-nullable" deprecation notice
* is not thrown when passing the default `$path` to untrailingslashit() in the function.
*
* The notice that we should not see:
* `Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated`.
*
* @ticket 55967
*/
public function test_does_not_throw_deprecation_notice_for_rtrim_with_default_parameters() {
$handle = 'test-example-root';
$src = '/wp-includes/js/script.js';

wp_enqueue_script( $handle, $src );

$expected = file_get_contents( DIR_TESTDATA . '/languages/en_US-813e104eb47e13dd4cc5af844c618754.json' );
$this->assertSame( $expected, load_script_textdomain( $handle ) );
}
}

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