…ize_Manager::get_return_url()`.

This particular code block only makes sense to run when `$this->return_url` is not null. Previously, it caused a "passing null to non-nullable" deprecation notice on PHP 8.1.

By moving the code into the `if ( $this->return_url )` condition block, the code will only be run when `$this->return_url` contains a non-falsey/non-null value.

No additional tests added as this issue was found via the existing tests for the function containing the bug.

This solves the following two PHP 8.1 test errors:
{{{
1) Tests_WP_Customize_Manager::test_return_url
parse_url(): Passing null to parameter #1 ($url) of type string is deprecated

/var/www/src/wp-includes/class-wp-customize-manager.php:4696
/var/www/tests/phpunit/tests/customize/manager.php:2975
/var/www/vendor/bin/phpunit:123

2) Tests_WP_Customize_Manager::test_customize_pane_settings
parse_url(): Passing null to parameter #1 ($url) of type string is deprecated

/var/www/src/wp-includes/class-wp-customize-manager.php:4696
/var/www/src/wp-includes/class-wp-customize-manager.php:4898
/var/www/tests/phpunit/tests/customize/manager.php:3085
/var/www/vendor/bin/phpunit:123
}}}

Follow-up to [46754].

Props jrf, costdev.
See #55656.

git-svn-id: https://develop.svn.wordpress.org/trunk@54135 602fd350-edb4-49c9-b593-d223f7449a82

…pc_server::mw_newPost()`.

The `wp_xmlrpc_server::mw_newPost()` method creates a new post via `wp_insert_post()`, but the default/fallback values used in the function were not in line with the default/fallback values used in the `wp_insert_post()` function.

The `wp_insert_post()` function does a `wp_parse_args()` (array merge) of the received arguments with the defaults. If any of the received arguments are `null`, this would overwrite the default value, as seen in [https://3v4l.org/bfVlv array_merge() example], and lead to "passing null to non-nullable" deprecation notices on PHP 8.1 for certain arguments.

This commit:
* Ensures that all arguments are defined before they are `compact()`'ed together to the arguments array.
* Verifies that the default/fallback value of the arguments as set within the `wp_xmlrpc_server::mw_newPost()` method are the same as the default/fallback values used in the `wp_insert_post()` function.
* Verifies that arguments which do not have a default/fallback value defined in the `wp_insert_post()` function are handled correctly.
 * This was not the case for `$post_name`, which would previously already get an empty string default value in the `wp_xmlrpc_server::mw_newPost()` function, but then in the `wp_insert_post()` function, this would prevent the slug generation from being activated. Fixed now by setting the default in the `wp_xmlrpc_server::mw_newPost()` function to `null`.
 * The `page_template` argument was handled, but not documented in the `wp_insert_post()` function. The argument is now documented in the `wp_insert_post()` function DocBlock. Note: There are more than likely several other potential arguments missing from that list, but verifying the whole list is outside the scope of this particular commit.

Includes minor simplifications, such as:
* Setting a default ahead of an `if`, instead of in an `else` clause (as long as no function call is needed to set the default).
* Removing the unnecessary logic duplication in the `$post_status` switch.
* Using a combined concatenation + assignment operator for adding `$post_more`.

Fixes various errors along the lines of:
{{{
1) Tests_XMLRPC_mw_editPost::test_draft_not_prematurely_published
strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated

/var/www/src/wp-includes/formatting.php:2497
/var/www/src/wp-includes/class-wp-hook.php:308
/var/www/src/wp-includes/plugin.php:205
/var/www/src/wp-includes/post.php:2835
/var/www/src/wp-includes/post.php:2720
/var/www/src/wp-includes/post.php:4066
/var/www/src/wp-includes/class-wp-xmlrpc-server.php:5616
/var/www/tests/phpunit/tests/xmlrpc/mw/editPost.php:315

...

23) Tests_XMLRPC_mw_editPost::test_draft_not_prematurely_published
json_decode(): Passing null to parameter #1 ($json) of type string is deprecated

/var/www/src/wp-includes/kses.php:2074
/var/www/src/wp-includes/class-wp-hook.php:307
/var/www/src/wp-includes/plugin.php:205
/var/www/src/wp-includes/post.php:2835
/var/www/src/wp-includes/post.php:2720
/var/www/src/wp-includes/post.php:4066
/var/www/src/wp-includes/class-wp-xmlrpc-server.php:5615
/var/www/tests/phpunit/tests/xmlrpc/mw/editPost.php:315
/var/www/vendor/bin/phpunit:123
}}}

Follow-up to [1563], [4793], [7900], [16824], [19848], [40677], [51968].

Props jrf.
See #55656.

git-svn-id: https://develop.svn.wordpress.org/trunk@54320 602fd350-edb4-49c9-b593-d223f7449a82

…pc_server::_insert_post()`.

The `wp_xmlrpc_server::_insert_post()` method creates a new post via `wp_insert_post()` or updates an existing one via `wp_update_post()`, which subsequently calls `wp_insert_post()`. However, the default/fallback values used in the function were not in line with the default/fallback values used in the `wp_insert_post()` function.

The `wp_insert_post()` function does a `wp_parse_args()` (array merge) of the received arguments with the defaults. If any of the received arguments are `null`, this would overwrite the default value, as seen in [https://3v4l.org/bfVlv array_merge() example], and lead to "passing null to non-nullable" deprecation notices on PHP 8.1 for certain arguments.

Unfortunately, the conditional logic within the `wp_xmlrpc_server::_insert_post()` function itself often uses an `isset()` to trigger certain code blocks, so syncing the defaults with those used in the `wp_insert_post()` function was not an option.

This commit:
* Updates the default/fallback values in the `$defaults` array only for those values where this would not lead to a change in the behavior of the function.
* Adds a safeguard function, filtering out all remaining `null` values from the `$post_data` array before it is passed on to the `wp_insert_post()` or `wp_update_post()` functions. Removing those values is safe as this means that these array keys will now:
 * either be set to the default/fallback value as defined in `wp_insert_post()`.
 * or not be set and for those values which don't have a default/fallback value in `wp_insert_post()`, the function does an `! empty()` or `isset()` check anyway and those array keys not being defined means that the result of those checks will remain the same.

Includes
* Removing a couple of conditions which are now redundant.
* Removing an `expectDeprecation()` in the `Tests_Date_XMLRPC` test class, which is now no longer needed.

Fixes various errors along the lines of:
{{{
36) Tests_XMLRPC_wp_newPost::test_no_content
json_decode(): Passing null to parameter #1 ($json) of type string is deprecated

/var/www/src/wp-includes/kses.php:2074
/var/www/src/wp-includes/class-wp-hook.php:307
/var/www/src/wp-includes/plugin.php:205
/var/www/src/wp-includes/post.php:2835
/var/www/src/wp-includes/post.php:2720
/var/www/src/wp-includes/post.php:4066
/var/www/src/wp-includes/class-wp-xmlrpc-server.php:1683
/var/www/src/wp-includes/class-wp-xmlrpc-server.php:1347
/var/www/tests/phpunit/tests/xmlrpc/wp/newPost.php:25
/var/www/vendor/bin/phpunit:123
}}}

Follow-up to [1563], [4793], [7900], [16824], [19848], [19873], [20632], [40677], [51968], [54320].

Props jrf.
See #55656.

git-svn-id: https://develop.svn.wordpress.org/trunk@54321 602fd350-edb4-49c9-b593-d223f7449a82

…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

…_JSON::get_property_value()`.

This commit aims to fix errors caused by incorrect usage of the `strncmp()` function inside the `WP_Theme_JSON::get_property_value()` method on PHP 8.1 and above.

Some history of the affected code:
* [50973] introduced the `WP_Theme_JSON::get_property_value()` method.
* [54162] removed the `$default` parameter from the `_wp_array_get()` call in the method.

With the latter change, the default value that is returned if the path does not exist within the array, or if `$array` or `$path` are not arrays, became `null` instead of an empty string. Since `null` would then be unintentionally passed to the `strncmp()` function further in the code, this caused ~35 errors in the test suite along the lines of:
{{{
1) Tests_Blocks_Editor::test_get_block_editor_settings_theme_json_settings
strncmp(): Passing null to parameter #1 ($string1) of type string is deprecated

/var/www/src/wp-includes/class-wp-theme-json.php:1754
/var/www/src/wp-includes/class-wp-theme-json.php:1641
/var/www/src/wp-includes/class-wp-theme-json.php:2066
/var/www/src/wp-includes/class-wp-theme-json.php:1002
/var/www/src/wp-includes/class-wp-theme-json.php:898
/var/www/src/wp-includes/global-styles-and-settings.php:140
/var/www/src/wp-includes/block-editor.php:421
/var/www/tests/phpunit/tests/blocks/editor.php:388
/var/www/vendor/bin/phpunit:123
}}}

This commit includes:
* Restoring the `$default` value for `_wp_array_get()` call.
* Adding an early return if the value is an empty string or `null`.
* Adding a dedicated unit test to ensure that the method returns a string for invalid paths or `null` values.

Follow-up to [50973], [54162].

Props antonvlasenko, jrf, imadarshakshat, SergeyBiryukov.
Fixes #56620.

git-svn-id: https://develop.svn.wordpress.org/trunk@54362 602fd350-edb4-49c9-b593-d223f7449a82

…L10n`.

These three tests for `wp_dashboard_recent_drafts()` would run into a PHP 8.1 "passing null to non-nullable" deprecation for the call to `ltrim()` when the result of `get_edit_post_link()` is passed to `esc_url()`.

Setting a deprecation expectation would not solve this as the returned value would still not match the expected value(s).

The recent drafts list is only displayed on the Dashboard screen for users with the `edit_posts` capability. By setting the current user to Editor, the prerequisites for `wp_dashboard_recent_drafts()` are met, which means the deprecation notice is avoided and the assertions will succeed.

This commit addresses a few errors in the test suite along the lines of:
{{{
1) Tests_L10n::test_length_of_draft_should_be_counted_by_words
ltrim(): Passing null to parameter #1 ($string) of type string is deprecated

/var/www/src/wp-includes/formatting.php:4376
/var/www/src/wp-admin/includes/dashboard.php:657
/var/www/tests/phpunit/tests/l10n.php:449
/var/www/vendor/bin/phpunit:123
}}}

Follow-up to [45505], [52253], [52259].

Props jrf, desrosj, SergeyBiryukov.
See #56681, #55652, #55656.

git-svn-id: https://develop.svn.wordpress.org/trunk@54365 602fd350-edb4-49c9-b593-d223f7449a82

The `$credentials['user_login']` and `$credentials['user_password']` parameters are passed by reference to the `wp_authenticate` action, and are at that point [https://www.php.net/manual/en/language.references.pass.php#124383 created as null] if they don't exist in the array.

This commit sets those values to an empty string, resolving two PHP 8.1 deprecation notices:
 * One from `preg_replace()` in `wp_strip_all_tags()` via `sanitize_user()` in `wp_authenticate()`:
{{{
Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated
}}}
 * One from `trim()` in `wp_authenticate()` itself:
{{{
Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated
}}}

Includes documenting the `$credentials` parameter using hash notation.

Follow-up to [6643], [37697].

Props lenasterg, TobiasBg, ocean90, afragen, lkraav, SergeyBiryukov.
Fixes #56850.

git-svn-id: https://develop.svn.wordpress.org/trunk@55301 602fd350-edb4-49c9-b593-d223f7449a82

…air screen.

The table is no longer created by core as of WordPress 3.0, and support for global terms was removed in WordPress 6.1, so `$wpdb->sitecategories` is unset by default.

This commit resolves a "passing null to non-nullable" deprecation notice on PHP 8.1:
{{{
Deprecated: addcslashes(): Passing null to parameter #1 ($string) of type string is deprecated in wp-includes/class-wpdb.php on line 1804
}}}

The `tables_to_repair` filter is available for plugins to readd the table or include any additional tables to repair.

Follow-up to [14854], [14880], [54240].

Props ipajen, chiragrathod103, SergeyBiryukov.
Fixes #57762.

git-svn-id: https://develop.svn.wordpress.org/trunk@55421 602fd350-edb4-49c9-b593-d223f7449a82

Demo

…om next_posts().

The `esc_url()` function expects to a string for `$url` parameter. There is no input validation within that function. The function contains a `ltrim()` which also expects a string. Passing `null` to this parameter results in `Deprecated: ltrim(): Passing null to parameter #1 ($string) of type string is deprecated` notice on PHP 8.1+.

Tracing the stack back, a `null` is being passed to it within `next_posts()` when `get_next_posts_page_link()` returns `null` (it can return a string or `null`).

On PHP 7.0 to PHP 8.x, an empty string is returned from `esc_url()` when `null` is passed to it. The change in this changeset avoids the deprecation notice by not invoking `esc_url()` when `get_next_posts_page_link()` returns `null` and instead sets the `$output` to an empty string, thus maintain the same behavior as before (minus the deprecation notice).

Adds a test to validate an empty string is returned and the absence of the deprecation (when running on PHP 8.1+).

Follow-up to [11383], [9632].

Props codersantosh, nihar007, hellofromTonya, mukesh27, oglekler, rajinsharwar.
Fixes #59154.

git-svn-id: https://develop.svn.wordpress.org/trunk@56740 602fd350-edb4-49c9-b593-d223f7449a82

…Info screen.

This resolves a fatal error if `strict_types` PHP setting is enabled:
{{{
Argument #1 ($num) must be of type float, string given
}}}

Since the goal of the Site Health Info screen is to display raw values where possible, the `number_format()` call here does not seem to provide any benefit.

Props krishneup, sabernhardt, audrasjb, SergeyBiryukov.
Fixes #60364.

git-svn-id: https://develop.svn.wordpress.org/trunk@58847 602fd350-edb4-49c9-b593-d223f7449a82

…ord()`.

This resolves a "passing null to non-nullable" deprecation notice on PHP 8.1+:
{{{
Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated
}}}

Follow-up to [50129], [54477].

Props afragen, peterwilsoncc, SergeyBiryukov.
Fixes #62298.

git-svn-id: https://develop.svn.wordpress.org/trunk@59312 602fd350-edb4-49c9-b593-d223f7449a82

…om `previous_posts()`.

The `esc_url()` function expects to a string for `$url` parameter. There is no input validation within that function. The function contains a `ltrim()` which also expects a string. Passing `null` to this parameter results in `Deprecated: ltrim(): Passing null to parameter #1 ($string) of type string is deprecated` notice on PHP 8.1+.

Tracing the stack back, a `null` is being passed to it within `previous_posts()` when `get_previous_posts_page_link()` returns `null` (it can return a string or `null`).

On PHP 7.0 to PHP 8.x, an empty string is returned from `esc_url()` when `null` is passed to it. The change in this changeset avoids the deprecation notice by not invoking `esc_url()` when `get_previous_posts_page_link()` returns `null` and instead sets the `$output` to an empty string, thus maintaining the same behavior as before (minus the deprecation notice).

Adds a test to validate an empty string is returned and the absence of the deprecation (when running on PHP 8.1+).

Follow-up to [9632], [11383], [56740].

Props dd32, alexodiy.
Fixes #64864.

git-svn-id: https://develop.svn.wordpress.org/trunk@62034 602fd350-edb4-49c9-b593-d223f7449a82