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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. Built from https://develop.svn.wordpress.org/trunk@54133 git-svn-id: http://core.svn.wordpress.org/trunk@53692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
296 lines
7.3 KiB
PHP
296 lines
7.3 KiB
PHP
<?php
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/**
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* Session API: WP_Session_Tokens class
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*
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* @package WordPress
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* @subpackage Session
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* @since 4.7.0
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*/
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/**
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* Abstract class for managing user session tokens.
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*
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* @since 4.0.0
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*/
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#[AllowDynamicProperties]
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abstract class WP_Session_Tokens {
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/**
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* User ID.
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*
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* @since 4.0.0
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* @var int User ID.
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*/
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protected $user_id;
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/**
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* Protected constructor. Use the `get_instance()` method to get the instance.
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*
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* @since 4.0.0
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*
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* @param int $user_id User whose session to manage.
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*/
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protected function __construct( $user_id ) {
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$this->user_id = $user_id;
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}
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/**
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* Retrieves a session manager instance for a user.
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*
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* This method contains a {@see 'session_token_manager'} filter, allowing a plugin to swap out
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* the session manager for a subclass of `WP_Session_Tokens`.
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*
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* @since 4.0.0
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*
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* @param int $user_id User whose session to manage.
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* @return WP_Session_Tokens The session object, which is by default an instance of
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* the `WP_User_Meta_Session_Tokens` class.
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*/
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final public static function get_instance( $user_id ) {
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/**
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* Filters the class name for the session token manager.
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*
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* @since 4.0.0
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*
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* @param string $session Name of class to use as the manager.
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* Default 'WP_User_Meta_Session_Tokens'.
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*/
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$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
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return new $manager( $user_id );
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}
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/**
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* Hashes the given session token for storage.
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*
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* @since 4.0.0
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*
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* @param string $token Session token to hash.
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* @return string A hash of the session token (a verifier).
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*/
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private function hash_token( $token ) {
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// If ext/hash is not present, use sha1() instead.
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if ( function_exists( 'hash' ) ) {
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return hash( 'sha256', $token );
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} else {
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return sha1( $token );
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}
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}
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/**
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* Retrieves a user's session for the given token.
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*
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* @since 4.0.0
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*
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* @param string $token Session token.
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* @return array|null The session, or null if it does not exist.
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*/
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final public function get( $token ) {
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$verifier = $this->hash_token( $token );
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return $this->get_session( $verifier );
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}
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/**
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* Validates the given session token for authenticity and validity.
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*
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* Checks that the given token is present and hasn't expired.
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*
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* @since 4.0.0
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*
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* @param string $token Token to verify.
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* @return bool Whether the token is valid for the user.
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*/
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final public function verify( $token ) {
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$verifier = $this->hash_token( $token );
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return (bool) $this->get_session( $verifier );
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}
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/**
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* Generates a session token and attaches session information to it.
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*
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* A session token is a long, random string. It is used in a cookie
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* to link that cookie to an expiration time and to ensure the cookie
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* becomes invalidated when the user logs out.
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*
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* This function generates a token and stores it with the associated
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* expiration time (and potentially other session information via the
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* {@see 'attach_session_information'} filter).
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*
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* @since 4.0.0
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*
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* @param int $expiration Session expiration timestamp.
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* @return string Session token.
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*/
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final public function create( $expiration ) {
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/**
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* Filters the information attached to the newly created session.
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*
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* Can be used to attach further information to a session.
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*
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* @since 4.0.0
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*
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* @param array $session Array of extra data.
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* @param int $user_id User ID.
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*/
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$session = apply_filters( 'attach_session_information', array(), $this->user_id );
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$session['expiration'] = $expiration;
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// IP address.
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if ( ! empty( $_SERVER['REMOTE_ADDR'] ) ) {
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$session['ip'] = $_SERVER['REMOTE_ADDR'];
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}
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// User-agent.
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if ( ! empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
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$session['ua'] = wp_unslash( $_SERVER['HTTP_USER_AGENT'] );
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}
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// Timestamp.
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$session['login'] = time();
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$token = wp_generate_password( 43, false, false );
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$this->update( $token, $session );
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return $token;
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}
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/**
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* Updates the data for the session with the given token.
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*
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* @since 4.0.0
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*
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* @param string $token Session token to update.
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* @param array $session Session information.
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*/
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final public function update( $token, $session ) {
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$verifier = $this->hash_token( $token );
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$this->update_session( $verifier, $session );
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}
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/**
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* Destroys the session with the given token.
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*
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* @since 4.0.0
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*
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* @param string $token Session token to destroy.
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*/
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final public function destroy( $token ) {
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$verifier = $this->hash_token( $token );
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$this->update_session( $verifier, null );
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}
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/**
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* Destroys all sessions for this user except the one with the given token (presumably the one in use).
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*
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* @since 4.0.0
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*
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* @param string $token_to_keep Session token to keep.
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*/
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final public function destroy_others( $token_to_keep ) {
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$verifier = $this->hash_token( $token_to_keep );
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$session = $this->get_session( $verifier );
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if ( $session ) {
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$this->destroy_other_sessions( $verifier );
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} else {
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$this->destroy_all_sessions();
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}
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}
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/**
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* Determines whether a session is still valid, based on its expiration timestamp.
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*
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* @since 4.0.0
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*
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* @param array $session Session to check.
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* @return bool Whether session is valid.
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*/
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final protected function is_still_valid( $session ) {
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return $session['expiration'] >= time();
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}
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/**
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* Destroys all sessions for a user.
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*
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* @since 4.0.0
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*/
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final public function destroy_all() {
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$this->destroy_all_sessions();
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}
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/**
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* Destroys all sessions for all users.
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*
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* @since 4.0.0
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*/
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final public static function destroy_all_for_all_users() {
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/** This filter is documented in wp-includes/class-wp-session-tokens.php */
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$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
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call_user_func( array( $manager, 'drop_sessions' ) );
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}
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/**
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* Retrieves all sessions for a user.
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*
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* @since 4.0.0
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*
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* @return array Sessions for a user.
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*/
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final public function get_all() {
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return array_values( $this->get_sessions() );
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}
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/**
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* Retrieves all sessions of the user.
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*
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* @since 4.0.0
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*
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* @return array Sessions of the user.
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*/
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abstract protected function get_sessions();
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/**
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* Retrieves a session based on its verifier (token hash).
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*
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* @since 4.0.0
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*
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* @param string $verifier Verifier for the session to retrieve.
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* @return array|null The session, or null if it does not exist.
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*/
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abstract protected function get_session( $verifier );
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/**
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* Updates a session based on its verifier (token hash).
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*
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* Omitting the second argument destroys the session.
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*
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* @since 4.0.0
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*
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* @param string $verifier Verifier for the session to update.
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* @param array $session Optional. Session. Omitting this argument destroys the session.
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*/
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abstract protected function update_session( $verifier, $session = null );
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/**
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* Destroys all sessions for this user, except the single session with the given verifier.
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*
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* @since 4.0.0
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*
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* @param string $verifier Verifier of the session to keep.
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*/
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abstract protected function destroy_other_sessions( $verifier );
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/**
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* Destroys all sessions for the user.
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*
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* @since 4.0.0
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*/
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abstract protected function destroy_all_sessions();
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/**
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* Destroys all sessions for all users.
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*
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* @since 4.0.0
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*/
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public static function drop_sessions() {}
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}
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