Core uses 3 known, named, dynamic properties on the `WP_Text_Diff_Renderer_Table` class:
* `_title`
* `_title_left`
* `_title_right`
When reviewing revisions (within the admin UI), `wp_text_diff()` passes the arguments (without the leading `_`) to a new instance, which raised deprecation notices (see [56354]).
Note: the parent class adds the leading `_` to each of these properties (see [7747]).
The deprecation notices are resolved by declaring each of these known, named, dynamic properties on the class, per the #56034 mitigation strategy. These new properties are not initialized to retain their previous `null` behavior.
Follow-up to [56354], [23506], [7747].
Props wildworks, antonvlasenko, hellofromTonya, ironprogrammer, kafleg, mukesh27, nicolefurlan, presskopp, sabernhardt.
Fixes#59431.
See #58898, #56034.
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Replaces `trigger_error()` with `wp_trigger_error()` in each of the `WP_Text_Diff_Renderer_Table` magic methods.
[56354] added the dynamic properties deprecation messages to the `__get()`, `__set()`, `__isset()`, `__unset()` magic methods. Since that commit, `wp_trigger_error()` was introduced (see [56530]) as a wrapper for `trigger_error()`.
Follow-up to [56354], [56530].
See #58898, #57686.
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The unknown use of unknown dynamic property within the `WP_Text_Diff_Renderer_Table` property magic methods is now deprecated. A descriptive deprecation notice is provided to alert developers to declare the property on the child class extending `WP_Text_Diff_Renderer_Table`.
Changes in this commit:
* Adds a deprecation notice to the `__get()`, `__set()`, `__isset()`, `__unset()` magic methods, i.e. to alert and inform developers when attempting to get/set/isset/unset a dynamic property.
* Fixes `__get()` to explicitly returns `null` when attempting to get a dynamic property.
* Fixes `__set()` by removing the value return after setting a declared property, as (a) unnecessary and (b) `__set()` should return `void` [https://www.php.net/manual/en/language.oop5.overloading.php#object.set per the PHP handbook].
* Fixes `__isset()` to return `false` if not in the `$compat_fields`, as `isset()` and `__isset()` should always return `bool`:
* [https://www.php.net/manual/en/language.oop5.overloading.php#object.isset `__isset()` in the PHP manual]
* [https://www.php.net/manual/en/function.isset.php `isset()` in the PHP manual]
* Adds a test class with happy and unhappy paths for these changes.
For backward compatibility, no changes are made to the internal declared properties listed in `$compat_fields` and accessed through the magic methods.
For example:
A child class uses a property named `$data` that is not declared as a property on the child class. When getting its value, e.g. `$user_query->data`, the `WP_Text_Diff_Renderer_Table::__get()` magic method is invoked, the following deprecation notice thrown, and `null` returned:
>The property `data` is not declared. Setting a dynamic property is deprecated since version 6.4.0! Instead, declare the property on the class.
=== Why not remove the magic methods, remove the `$compat_fields` property, and restore the properties `public`?
tl;dr Backward compatibility.
If a plugin adds a property to `$compat_fields` array, then sites using that plugin would experience (a) an `Undefined property` `Warning` (PHP 8) | `Notice` (PHP 7) and (b) a possible change in behavior.
=== Why not limit the deprecation for PHP versions >= 8.2?
tl;dr original design intent and inform
The magic methods and `$compat_fields` property were added for one purpose: to continue providing external access to internal properties declared on `WP_Text_Diff_Renderer_Table`. They were not intended to be used for dynamic properties.
Deprecating that unintended usage both alerts developers a change is needed in their child class and informs them what to change.
References:
* Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0.
* A [https://www.youtube.com/live/vDZWepDQQVE?feature=share&t=10097 live open public working session] where these changes were discussed and agreed to.
* [https://wiki.php.net/rfc/deprecate_dynamic_properties PHP RFC: Deprecate dynamic properties.]
Follow-up to [28525], [31135].
Props antonvlasenko, rajinsharwar, jrf, markjaquith, hellofromTonya, SergeyBiryukov, desrosj, peterwilsoncc, audrasjb, costdev, oglekler, jeffpaul.
Fixes#58898.
See #56034.
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This aims to provide better context for translators and make it easier to determine that some strings contain hidden accessibility text and are not displayed in the UI.
Props kebbet, mercime, pavelevap, ocean90, swissspidy, Chouby, jipmoors, afercia, desrosj, costdev, audrasjb, SergeyBiryukov.
Fixes#29748.
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This commit adds inline comments instructing PHPCS to ignore parameters with reserved keywords in the affected methods that should not be renamed:
* `$string` parameter in `WP_Text_Diff_Renderer_inline::_splitOnWords()`
* `$final` parameter in `WP_Text_Diff_Renderer_Table::_changed()` and `::interleave_changed_lines()`
This resolves a few WPCS warnings along the lines of:
{{{
It is recommended not to use reserved keyword "string" as function parameter name. Found: $string
It is recommended not to use reserved keyword "final" as function parameter name. Found: $final
}}}
The two `WP_Text_Diff_Renderer_*` classes in question extend the `Text_Diff_Renderer_inline` and `Text_Diff_Renderer` classes from the `Text_Diff` package and should have the same parameters as the parent class methods, per the Task 1 section of ticket #51553.
The `Text_Diff` library currently included in WordPress core is no longer kept in sync with the upstream project and can be considered “adopted”, so the `$string` and `$final` parameters in the parent class methods can technically be renamed, e.g. to `$input_string` and `$modified`, respectively.
However, the “final” wording is also used to represent modified content in other parts the library, so it is more internally consistent to keep these parameters as is for now.
Follow-up to [7747], [38352], [55136].
See #56788.
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Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0.
There are a number of ways to mitigate this:
* If it is an accidental typo for a declared property: fix the typo.
* For known properties: declare them on the class.
* For unknown properties: add the magic `__get()`, `__set()`, et al. methods to the class or let the class extend `stdClass` which has highly optimized versions of these magic methods built in.
* For unknown ''use'' of dynamic properties, the `#[AllowDynamicProperties]` attribute can be added to the class. The attribute will automatically be inherited by child classes.
Trac ticket #56034 is open to investigate and handle the third and fourth type of situations, however it has become clear this will need more time and will not be ready in time for WP 6.1.
To reduce “noise” in the meantime, both in the error logs of WP users moving onto PHP 8.2, in the test run logs of WP itself, in test runs of plugins and themes, as well as to prevent duplicate tickets from being opened for the same issue, this commit adds the `#[AllowDynamicProperties]` attribute to all “parent” classes in WP.
The logic used for this commit is as follows:
* If a class already has the attribute: no action needed.
* If a class does not `extend`: add the attribute.
* If a class does `extend`:
- If it extends `stdClass`: no action needed (as `stdClass` supports dynamic properties).
- If it extends a PHP native class: add the attribute.
- If it extends a class from one of WP's external dependencies: add the attribute.
* In all other cases: no action — the attribute should not be needed as child classes inherit from the parent.
Whether or not a class contains magic methods has not been taken into account, as a review of the currently existing magic methods has shown that those are generally not sturdy enough and often even set dynamic properties (which they should not). See the [https://www.youtube.com/watch?v=vDZWepDQQVE live stream from August 16, 2022] for more details.
This commit only affects classes in the `src` directory of WordPress core.
* Tests should not get this attribute, but should be fixed to not use dynamic properties instead. Patches for this are already being committed under ticket #56033.
* While a number bundled themes (2014, 2019, 2020, 2021) contain classes, they are not a part of this commit and may be updated separately.
Reference: [https://wiki.php.net/rfc/deprecate_dynamic_properties PHP RFC: Deprecate dynamic properties].
Follow-up to [53922].
Props jrf, hellofromTonya, markjaquith, peterwilsoncc, costdev, knutsp, aristath.
See #56513, #56034.
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The function `wp_text_diff` generated an invalid table structure if the $args parameter contained any values. This patch corrects the structure generated by `wp_text_diff` and related usages so that the column count matches the data generated. Additionally, this patch passes arguments to the Revisions screen so that the screen has column headings that reflect the content in each column. Improves the accessibility and usability of the Revisions table.
Props joedolson, mehulkaklotar, afercia, adamsilverstein, zodiac1978, jeremyfelt
Fixes#25473
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Using the canonical function name for PHP functions is strongly recommended, as aliases may be deprecated or removed without (much) warning.
This replaces all uses of the following:
* `join()` with `implode()`
* `sizeof()` with `count()`
* `is_writeable()` with `is_writable()`
* `doubleval()` with a `(float)` cast
In part, this is a follow-up to #47746.
Props jrf.
See #50767.
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Color alone is not sufficient to visually communicate differences.
- adds `plus` and `minus` icons to the changed lines
- adds visually hidden text: `Added`, `Deleted`, and `Unchanged` to clarify the differences to assistive technologies users
Props birgire, audrasjb, kjellr, adamsilverstein.
Fixes#43532.
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`WP_Text_Diff_Renderer_Table` is used to generate the diff view in revisions, but there were some cases that could cause it to take excessive amounts of time to run.
Some noteable cases include:
- When a large number of new lines were inserted in the middle of the post from one revision to the next.
- When both revisions contain >100 lines.
- When either revision contains a lot of long lines.
In one extreme test case, the diff view took over a minute to generate. With this change, it now takes less than a second.
Merges [43775] from the 5.0 branch to trunk.
Fixes#35667.
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Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs.
See #41452.
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hellofromTonya
Sergey Biryukov
audrasjb
joedolson
John Blackbourn
Andrea Fercia
Gary Pendergast
Drew Jaynes
Scott Taylor