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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This tag has been used in the past, but should no longer be used. Just using the `static` keyword in code is enough for PhpDocumentor on PHP5+ to recognize static variables and methods, and PhpDocumentor will mark them as static.
Props birgire.
See #42803.
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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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When `WP_Term` was introduced in [34997], the `$taxonomy` parameter for
`get_term()` was made optional. This meant that, when the optional param was
omitted, `get_term()` had no way of determining which term was intended when
the term_id was shared between multiple taxonomies. As a (somewhat sneaky) way
of fixing things, `get_term()` split any shared terms it found. But this could
cause problems with developer expectations: it's not clear why requesting a
term should result in a database update, much less a potential change in the
ID of a term.
In place of this technique, this changeset introduces a number of changes that
make the handling of shared terms a bit less insane:
* When a taxonomy is provided to `get_term()`, and a cached term is found matching the term_id, make sure the taxonomy also matches before returning it.
* When a taxonomy is not provided, ensure that the term is not shared before adding it to the cache.
* When a term is shared between taxonomies and no taxonomy is provided, return a `WP_Error` rather than splitting the term.
* When a term is shared between taxonomies, only one of which is valid, return the term from that taxonomy.
Props boonebgorges, dlh.
Fixes#34533.
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`wp_ajax_add_term()` fetches a term using `get_term()`, and passes the term to
`WP_Ajax_Response`, which expects each of the term's properties to be scalar.
Having `$data` as a `stdClass` (meant to mimic `WP_User::data`, populated by
a `get_row()` database query) violated this expectation, causing fatal string
conversion errors. As a workaround, `$term->data` is converted so that it is
no longer an actual property of the term object, but is assembled only when
requested in the magic `__get()` method.
Fixes#34348.
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The data stored in the cache should be raw database query results, not
`WP_Term` objects (which may be modified by plugins, and may contain additional
properties that shouldn't be cached).
If term relationships caches were handled in `wp_get_object_terms()` - where
a database query takes place - it would be straightforward to cache raw data.
See #34239. Since, in fact, `get_the_terms()` caches the value it gets from
`wp_get_object_terms()`, we need a technique that allows us to get raw data
from a `WP_Term` object. Mirroring `WP_User`, we introduce a `data` property
on term objects, which `get_the_terms()` uses to fetch cacheable term info.
Fixes#34262.
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`get_term()` now returns a `WP_Term` object, instead of a `stdClass` object.
Cache support and sanitization filters for individual terms are now more
centralized. For example, `get_term_by()` is able to cast results of its query
to a `WP_Term` object by passing it through `get_term()`.
The `$taxonomy` parameter for `get_term()` is now optional, as terms ought to
be unique to a taxonomy (ie, shared terms no longer exist). In cases where
`get_term()` detects that the term matching the specified term_id is from the
wrong taxonomy, it checks to see if you've requested a shared term, and if so,
it splits the term. This is used only for fallback purposes.
The elimination of shared terms allows the caching strategy for terms to be
simplified. Individual terms are now cached in a single 'terms' bucket.
Props flixos90, boonebgorges, scribu, dipesh.kakadiya.
See #14162.
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Sergey Biryukov
John Blackbourn
Gary Pendergast
Drew Jaynes
Boone Gorges
Scott Taylor