/** * Defines constants and global variables that can be overridden, generally in wp-config.php. * * @package WordPress */ /** * Defines initial WordPress constants. * * @see wp_debug_mode() * * @since 3.0.0 * * @global int $blog_id The current site ID. * @global string $wp_version The WordPress version string. */ function wp_initial_constants() { global $blog_id, $wp_version; /**#@+ * Constants for expressing human-readable data sizes in their respective number of bytes. * * @since 4.4.0 */ define( 'KB_IN_BYTES', 1024 ); define( 'MB_IN_BYTES', 1024 * KB_IN_BYTES ); define( 'GB_IN_BYTES', 1024 * MB_IN_BYTES ); define( 'TB_IN_BYTES', 1024 * GB_IN_BYTES ); /**#@-*/ // Start of run timestamp. if ( ! defined( 'WP_START_TIMESTAMP' ) ) { define( 'WP_START_TIMESTAMP', microtime( true ) ); } $current_limit = ini_get( 'memory_limit' ); $current_limit_int = wp_convert_hr_to_bytes( $current_limit ); // Define memory limits. if ( ! defined( 'WP_MEMORY_LIMIT' ) ) { if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) { define( 'WP_MEMORY_LIMIT', $current_limit ); } elseif ( is_multisite() ) { define( 'WP_MEMORY_LIMIT', '64M' ); } else { define( 'WP_MEMORY_LIMIT', '40M' ); } } if ( ! defined( 'WP_MAX_MEMORY_LIMIT' ) ) { if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) { define( 'WP_MAX_MEMORY_LIMIT', $current_limit ); } elseif ( -1 === $current_limit_int || $current_limit_int > 268435456 /* = 256M */ ) { define( 'WP_MAX_MEMORY_LIMIT', $current_limit ); } else { define( 'WP_MAX_MEMORY_LIMIT', '256M' ); } } // Set memory limits. $wp_limit_int = wp_convert_hr_to_bytes( WP_MEMORY_LIMIT ); if ( -1 !== $current_limit_int && ( -1 === $wp_limit_int || $wp_limit_int > $current_limit_int ) ) { ini_set( 'memory_limit', WP_MEMORY_LIMIT ); } if ( ! isset( $blog_id ) ) { $blog_id = 1; } if ( ! defined( 'WP_CONTENT_DIR' ) ) { define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' ); // No trailing slash, full paths only - WP_CONTENT_URL is defined further down. } // Add define( 'WP_DEBUG', true ); to wp-config.php to enable display of notices during development. if ( ! defined( 'WP_DEBUG' ) ) { if ( 'development' === wp_get_environment_type() ) { define( 'WP_DEBUG', true ); } else { define( 'WP_DEBUG', false ); } } // Add define( 'WP_DEBUG_DISPLAY', null ); to wp-config.php to use the globally configured setting // for 'display_errors' and not force errors to be displayed. Use false to force 'display_errors' off. if ( ! defined( 'WP_DEBUG_DISPLAY' ) ) { define( 'WP_DEBUG_DISPLAY', true ); } // Add define( 'WP_DEBUG_LOG', true ); to enable error logging to wp-content/debug.log. if ( ! defined( 'WP_DEBUG_LOG' ) ) { define( 'WP_DEBUG_LOG', false ); } if ( ! defined( 'WP_CACHE' ) ) { define( 'WP_CACHE', false ); } // Add define( 'SCRIPT_DEBUG', true ); to wp-config.php to enable loading of non-minified, // non-concatenated scripts and stylesheets. if ( ! defined( 'SCRIPT_DEBUG' ) ) { if ( ! empty( $wp_version ) ) { $develop_src = false !== strpos( $wp_version, '-src' ); } else { $develop_src = false; } define( 'SCRIPT_DEBUG', $develop_src ); } /** * Private */ if ( ! defined( 'MEDIA_TRASH' ) ) { define( 'MEDIA_TRASH', false ); } if ( ! defined( 'SHORTINIT' ) ) { define( 'SHORTINIT', false ); } // Constants for features added to WP that should short-circuit their plugin implementations. define( 'WP_FEATURE_BETTER_PASSWORDS', true ); /**#@+ * Constants for expressing human-readable intervals * in their respective number of seconds. * * Please note that these values are approximate and are provided for convenience. * For example, MONTH_IN_SECONDS wrongly assumes every month has 30 days and * YEAR_IN_SECONDS does not take leap years into account. * * If you need more accuracy please consider using the DateTime class (https://www.php.net/manual/en/class.datetime.php). * * @since 3.5.0 * @since 4.4.0 Introduced `MONTH_IN_SECONDS`. */ define( 'MINUTE_IN_SECONDS', 60 ); define( 'HOUR_IN_SECONDS', 60 * MINUTE_IN_SECONDS ); define( 'DAY_IN_SECONDS', 24 * HOUR_IN_SECONDS ); define( 'WEEK_IN_SECONDS', 7 * DAY_IN_SECONDS ); define( 'MONTH_IN_SECONDS', 30 * DAY_IN_SECONDS ); define( 'YEAR_IN_SECONDS', 365 * DAY_IN_SECONDS ); /**#@-*/ } /** * Defines plugin directory WordPress constants. * * Defines must-use plugin directory constants, which may be overridden in the sunrise.php drop-in. * * @since 3.0.0 */ function wp_plugin_directory_constants() { if ( ! defined( 'WP_CONTENT_URL' ) ) { define( 'WP_CONTENT_URL', get_option( 'siteurl' ) . '/wp-content' ); // Full URL - WP_CONTENT_DIR is defined further up. } /** * Allows for the plugins directory to be moved from the default location. * * @since 2.6.0 */ if ( ! defined( 'WP_PLUGIN_DIR' ) ) { define( 'WP_PLUGIN_DIR', WP_CONTENT_DIR . '/plugins' ); // Full path, no trailing slash. } /** * Allows for the plugins directory to be moved from the default location. * * @since 2.6.0 */ if ( ! defined( 'WP_PLUGIN_URL' ) ) { define( 'WP_PLUGIN_URL', WP_CONTENT_URL . '/plugins' ); // Full URL, no trailing slash. } /** * Allows for the plugins directory to be moved from the default location. * * @since 2.1.0 * @deprecated */ if ( ! defined( 'PLUGINDIR' ) ) { define( 'PLUGINDIR', 'wp-content/plugins' ); // Relative to ABSPATH. For back compat. } /** * Allows for the mu-plugins directory to be moved from the default location. * * @since 2.8.0 */ if ( ! defined( 'WPMU_PLUGIN_DIR' ) ) { define( 'WPMU_PLUGIN_DIR', WP_CONTENT_DIR . '/mu-plugins' ); // Full path, no trailing slash. } /** * Allows for the mu-plugins directory to be moved from the default location. * * @since 2.8.0 */ if ( ! defined( 'WPMU_PLUGIN_URL' ) ) { define( 'WPMU_PLUGIN_URL', WP_CONTENT_URL . '/mu-plugins' ); // Full URL, no trailing slash. } /** * Allows for the mu-plugins directory to be moved from the default location. * * @since 2.8.0 * @deprecated */ if ( ! defined( 'MUPLUGINDIR' ) ) { define( 'MUPLUGINDIR', 'wp-content/mu-plugins' ); // Relative to ABSPATH. For back compat. } } /** * Defines cookie-related WordPress constants. * * Defines constants after multisite is loaded. * * @since 3.0.0 */ function wp_cookie_constants() { /** * Used to guarantee unique hash cookies. * * @since 1.5.0 */ if ( ! defined( 'COOKIEHASH' ) ) { $siteurl = get_site_option( 'siteurl' ); if ( $siteurl ) { define( 'COOKIEHASH', md5( $siteurl ) ); } else { define( 'COOKIEHASH', '' ); } } /** * @since 2.0.0 */ if ( ! defined( 'USER_COOKIE' ) ) { define( 'USER_COOKIE', 'wordpressuser_' . COOKIEHASH ); } /** * @since 2.0.0 */ if ( ! defined( 'PASS_COOKIE' ) ) { define( 'PASS_COOKIE', 'wordpresspass_' . COOKIEHASH ); } /** * @since 2.5.0 */ if ( ! defined( 'AUTH_COOKIE' ) ) { define( 'AUTH_COOKIE', 'wordpress_' . COOKIEHASH ); } /** * @since 2.6.0 */ if ( ! defined( 'SECURE_AUTH_COOKIE' ) ) { define( 'SECURE_AUTH_COOKIE', 'wordpress_sec_' . COOKIEHASH ); } /** * @since 2.6.0 */ if ( ! defined( 'LOGGED_IN_COOKIE' ) ) { define( 'LOGGED_IN_COOKIE', 'wordpress_logged_in_' . COOKIEHASH ); } /** * @since 2.3.0 */ if ( ! defined( 'TEST_COOKIE' ) ) { define( 'TEST_COOKIE', 'wordpress_test_cookie' ); } /** * @since 1.2.0 */ if ( ! defined( 'COOKIEPATH' ) ) { define( 'COOKIEPATH', preg_replace( '|https?://[^/]+|i', '', get_option( 'home' ) . '/' ) ); } /** * @since 1.5.0 */ if ( ! defined( 'SITECOOKIEPATH' ) ) { define( 'SITECOOKIEPATH', preg_replace( '|https?://[^/]+|i', '', get_option( 'siteurl' ) . '/' ) ); } /** * @since 2.6.0 */ if ( ! defined( 'ADMIN_COOKIE_PATH' ) ) { define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH . 'wp-admin' ); } /** * @since 2.6.0 */ if ( ! defined( 'PLUGINS_COOKIE_PATH' ) ) { define( 'PLUGINS_COOKIE_PATH', preg_replace( '|https?://[^/]+|i', '', WP_PLUGIN_URL ) ); } /** * @since 2.0.0 */ if ( ! defined( 'COOKIE_DOMAIN' ) ) { define( 'COOKIE_DOMAIN', false ); } if ( ! defined( 'RECOVERY_MODE_COOKIE' ) ) { /** * @since 5.2.0 */ define( 'RECOVERY_MODE_COOKIE', 'wordpress_rec_' . COOKIEHASH ); } } /** * Defines SSL-related WordPress constants. * * @since 3.0.0 */ function wp_ssl_constants() { /** * @since 2.6.0 */ if ( ! defined( 'FORCE_SSL_ADMIN' ) ) { if ( 'https' === parse_url( get_option( 'siteurl' ), PHP_URL_SCHEME ) ) { define( 'FORCE_SSL_ADMIN', true ); } else { define( 'FORCE_SSL_ADMIN', false ); } } force_ssl_admin( FORCE_SSL_ADMIN ); /** * @since 2.6.0 * @deprecated 4.0.0 */ if ( defined( 'FORCE_SSL_LOGIN' ) && FORCE_SSL_LOGIN ) { force_ssl_admin( true ); } } /** * Defines functionality-related WordPress constants. * * @since 3.0.0 */ function wp_functionality_constants() { /** * @since 2.5.0 */ if ( ! defined( 'AUTOSAVE_INTERVAL' ) ) { define( 'AUTOSAVE_INTERVAL', MINUTE_IN_SECONDS ); } /** * @since 2.9.0 */ if ( ! defined( 'EMPTY_TRASH_DAYS' ) ) { define( 'EMPTY_TRASH_DAYS', 30 ); } if ( ! defined( 'WP_POST_REVISIONS' ) ) { define( 'WP_POST_REVISIONS', true ); } /** * @since 3.3.0 */ if ( ! defined( 'WP_CRON_LOCK_TIMEOUT' ) ) { define( 'WP_CRON_LOCK_TIMEOUT', MINUTE_IN_SECONDS ); } } /** * Defines templating-related WordPress constants. * * @since 3.0.0 */ function wp_templating_constants() { /** * Filesystem path to the current active template directory. * * @since 1.5.0 */ define( 'TEMPLATEPATH', get_template_directory() ); /** * Filesystem path to the current active template stylesheet directory. * * @since 2.1.0 */ define( 'STYLESHEETPATH', get_stylesheet_directory() ); /** * Slug of the default theme for this installation. * Used as the default theme when installing new sites. * It will be used as the fallback if the current theme doesn't exist. * * @since 3.0.0 * * @see WP_Theme::get_core_default_theme() */ if ( ! defined( 'WP_DEFAULT_THEME' ) ) { define( 'WP_DEFAULT_THEME', 'twentytwentytwo' ); } } /** * Plugin API: WP_Hook class * * @package WordPress * @subpackage Plugin * @since 4.7.0 */ /** * Core class used to implement action and filter hook functionality. * * @since 4.7.0 * * @see Iterator * @see ArrayAccess */ final class WP_Hook implements Iterator, ArrayAccess { /** * Hook callbacks. * * @since 4.7.0 * @var array */ public $callbacks = array(); /** * The priority keys of actively running iterations of a hook. * * @since 4.7.0 * @var array */ private $iterations = array(); /** * The current priority of actively running iterations of a hook. * * @since 4.7.0 * @var array */ private $current_priority = array(); /** * Number of levels this hook can be recursively called. * * @since 4.7.0 * @var int */ private $nesting_level = 0; /** * Flag for if we're currently doing an action, rather than a filter. * * @since 4.7.0 * @var bool */ private $doing_action = false; /** * Adds a callback function to a filter hook. * * @since 4.7.0 * * @param string $hook_name The name of the filter to add the callback to. * @param callable $callback The callback to be run when the filter is applied. * @param int $priority The order in which the functions associated with a particular filter * are executed. Lower numbers correspond with earlier execution, * and functions with the same priority are executed in the order * in which they were added to the filter. * @param int $accepted_args The number of arguments the function accepts. */ public function add_filter( $hook_name, $callback, $priority, $accepted_args ) { $idx = _wp_filter_build_unique_id( $hook_name, $callback, $priority ); $priority_existed = isset( $this->callbacks[ $priority ] ); $this->callbacks[ $priority ][ $idx ] = array( 'function' => $callback, 'accepted_args' => $accepted_args, ); // If we're adding a new priority to the list, put them back in sorted order. if ( ! $priority_existed && count( $this->callbacks ) > 1 ) { ksort( $this->callbacks, SORT_NUMERIC ); } if ( $this->nesting_level > 0 ) { $this->resort_active_iterations( $priority, $priority_existed ); } } /** * Handles resetting callback priority keys mid-iteration. * * @since 4.7.0 * * @param false|int $new_priority Optional. The priority of the new filter being added. Default false, * for no priority being added. * @param bool $priority_existed Optional. Flag for whether the priority already existed before the new * filter was added. Default false. */ private function resort_active_iterations( $new_priority = false, $priority_existed = false ) { $new_priorities = array_keys( $this->callbacks ); // If there are no remaining hooks, clear out all running iterations. if ( ! $new_priorities ) { foreach ( $this->iterations as $index => $iteration ) { $this->iterations[ $index ] = $new_priorities; } return; } $min = min( $new_priorities ); foreach ( $this->iterations as $index => &$iteration ) { $current = current( $iteration ); // If we're already at the end of this iteration, just leave the array pointer where it is. if ( false === $current ) { continue; } $iteration = $new_priorities; if ( $current < $min ) { array_unshift( $iteration, $current ); continue; } while ( current( $iteration ) < $current ) { if ( false === next( $iteration ) ) { break; } } // If we have a new priority that didn't exist, but ::apply_filters() or ::do_action() thinks it's the current priority... if ( $new_priority === $this->current_priority[ $index ] && ! $priority_existed ) { /* * ...and the new priority is the same as what $this->iterations thinks is the previous * priority, we need to move back to it. */ if ( false === current( $iteration ) ) { // If we've already moved off the end of the array, go back to the last element. $prev = end( $iteration ); } else { // Otherwise, just go back to the previous element. $prev = prev( $iteration ); } if ( false === $prev ) { // Start of the array. Reset, and go about our day. reset( $iteration ); } elseif ( $new_priority !== $prev ) { // Previous wasn't the same. Move forward again. next( $iteration ); } } } unset( $iteration ); } /** * Removes a callback function from a filter hook. * * @since 4.7.0 * * @param string $hook_name The filter hook to which the function to be removed is hooked. * @param callable|string|array $callback The callback to be removed from running when the filter is applied. * This method can be called unconditionally to speculatively remove * a callback that may or may not exist. * @param int $priority The exact priority used when adding the original filter callback. * @return bool Whether the callback existed before it was removed. */ public function remove_filter( $hook_name, $callback, $priority ) { $function_key = _wp_filter_build_unique_id( $hook_name, $callback, $priority ); $exists = isset( $this->callbacks[ $priority ][ $function_key ] ); if ( $exists ) { unset( $this->callbacks[ $priority ][ $function_key ] ); if ( ! $this->callbacks[ $priority ] ) { unset( $this->callbacks[ $priority ] ); if ( $this->nesting_level > 0 ) { $this->resort_active_iterations(); } } } return $exists; } /** * Checks if a specific callback has been registered for this hook. * * When using the `$callback` argument, this function may return a non-boolean value * that evaluates to false (e.g. 0), so use the `===` operator for testing the return value. * * @since 4.7.0 * * @param string $hook_name Optional. The name of the filter hook. Default empty. * @param callable|string|array|false $callback Optional. The callback to check for. * This method can be called unconditionally to speculatively check * a callback that may or may not exist. Default false. * @return bool|int If `$callback` is omitted, returns boolean for whether the hook has * anything registered. When checking a specific function, the priority * of that hook is returned, or false if the function is not attached. */ public function has_filter( $hook_name = '', $callback = false ) { if ( false === $callback ) { return $this->has_filters(); } $function_key = _wp_filter_build_unique_id( $hook_name, $callback, false ); if ( ! $function_key ) { return false; } foreach ( $this->callbacks as $priority => $callbacks ) { if ( isset( $callbacks[ $function_key ] ) ) { return $priority; } } return false; } /** * Checks if any callbacks have been registered for this hook. * * @since 4.7.0 * * @return bool True if callbacks have been registered for the current hook, otherwise false. */ public function has_filters() { foreach ( $this->callbacks as $callbacks ) { if ( $callbacks ) { return true; } } return false; } /** * Removes all callbacks from the current filter. * * @since 4.7.0 * * @param int|false $priority Optional. The priority number to remove. Default false. */ public function remove_all_filters( $priority = false ) { if ( ! $this->callbacks ) { return; } if ( false === $priority ) { $this->callbacks = array(); } elseif ( isset( $this->callbacks[ $priority ] ) ) { unset( $this->callbacks[ $priority ] ); } if ( $this->nesting_level > 0 ) { $this->resort_active_iterations(); } } /** * Calls the callback functions that have been added to a filter hook. * * @since 4.7.0 * * @param mixed $value The value to filter. * @param array $args Additional parameters to pass to the callback functions. * This array is expected to include $value at index 0. * @return mixed The filtered value after all hooked functions are applied to it. */ public function apply_filters( $value, $args ) { if ( ! $this->callbacks ) { return $value; } $nesting_level = $this->nesting_level++; $this->iterations[ $nesting_level ] = array_keys( $this->callbacks ); $num_args = count( $args ); do { $this->current_priority[ $nesting_level ] = current( $this->iterations[ $nesting_level ] ); $priority = $this->current_priority[ $nesting_level ]; foreach ( $this->callbacks[ $priority ] as $the_ ) { if ( ! $this->doing_action ) { $args[0] = $value; } // Avoid the array_slice() if possible. if ( 0 == $the_['accepted_args'] ) { $value = call_user_func( $the_['function'] ); } elseif ( $the_['accepted_args'] >= $num_args ) { $value = call_user_func_array( $the_['function'], $args ); } else { $value = call_user_func_array( $the_['function'], array_slice( $args, 0, (int) $the_['accepted_args'] ) ); } } } while ( false !== next( $this->iterations[ $nesting_level ] ) ); unset( $this->iterations[ $nesting_level ] ); unset( $this->current_priority[ $nesting_level ] ); $this->nesting_level--; return $value; } /** * Calls the callback functions that have been added to an action hook. * * @since 4.7.0 * * @param array $args Parameters to pass to the callback functions. */ public function do_action( $args ) { $this->doing_action = true; $this->apply_filters( '', $args ); // If there are recursive calls to the current action, we haven't finished it until we get to the last one. if ( ! $this->nesting_level ) { $this->doing_action = false; } } /** * Processes the functions hooked into the 'all' hook. * * @since 4.7.0 * * @param array $args Arguments to pass to the hook callbacks. Passed by reference. */ public function do_all_hook( &$args ) { $nesting_level = $this->nesting_level++; $this->iterations[ $nesting_level ] = array_keys( $this->callbacks ); do { $priority = current( $this->iterations[ $nesting_level ] ); foreach ( $this->callbacks[ $priority ] as $the_ ) { call_user_func_array( $the_['function'], $args ); } } while ( false !== next( $this->iterations[ $nesting_level ] ) ); unset( $this->iterations[ $nesting_level ] ); $this->nesting_level--; } /** * Return the current priority level of the currently running iteration of the hook. * * @since 4.7.0 * * @return int|false If the hook is running, return the current priority level. * If it isn't running, return false. */ public function current_priority() { if ( false === current( $this->iterations ) ) { return false; } return current( current( $this->iterations ) ); } /** * Normalizes filters set up before WordPress has initialized to WP_Hook objects. * * The `$filters` parameter should be an array keyed by hook name, with values * containing either: * * - A `WP_Hook` instance * - An array of callbacks keyed by their priorities * * Examples: * * $filters = array( * 'wp_fatal_error_handler_enabled' => array( * 10 => array( * array( * 'accepted_args' => 0, * 'function' => function() { * return false; * }, * ), * ), * ), * ); * * @since 4.7.0 * * @param array $filters Filters to normalize. See documentation above for details. * @return WP_Hook[] Array of normalized filters. */ public static function build_preinitialized_hooks( $filters ) { /** @var WP_Hook[] $normalized */ $normalized = array(); foreach ( $filters as $hook_name => $callback_groups ) { if ( is_object( $callback_groups ) && $callback_groups instanceof WP_Hook ) { $normalized[ $hook_name ] = $callback_groups; continue; } $hook = new WP_Hook(); // Loop through callback groups. foreach ( $callback_groups as $priority => $callbacks ) { // Loop through callbacks. foreach ( $callbacks as $cb ) { $hook->add_filter( $hook_name, $cb['function'], $priority, $cb['accepted_args'] ); } } $normalized[ $hook_name ] = $hook; } return $normalized; } /** * Determines whether an offset value exists. * * @since 4.7.0 * * @link https://www.php.net/manual/en/arrayaccess.offsetexists.php * * @param mixed $offset An offset to check for. * @return bool True if the offset exists, false otherwise. */ #[ReturnTypeWillChange] public function offsetExists( $offset ) { return isset( $this->callbacks[ $offset ] ); } /** * Retrieves a value at a specified offset. * * @since 4.7.0 * * @link https://www.php.net/manual/en/arrayaccess.offsetget.php * * @param mixed $offset The offset to retrieve. * @return mixed If set, the value at the specified offset, null otherwise. */ #[ReturnTypeWillChange] public function offsetGet( $offset ) { return isset( $this->callbacks[ $offset ] ) ? $this->callbacks[ $offset ] : null; } /** * Sets a value at a specified offset. * * @since 4.7.0 * * @link https://www.php.net/manual/en/arrayaccess.offsetset.php * * @param mixed $offset The offset to assign the value to. * @param mixed $value The value to set. */ #[ReturnTypeWillChange] public function offsetSet( $offset, $value ) { if ( is_null( $offset ) ) { $this->callbacks[] = $value; } else { $this->callbacks[ $offset ] = $value; } } /** * Unsets a specified offset. * * @since 4.7.0 * * @link https://www.php.net/manual/en/arrayaccess.offsetunset.php * * @param mixed $offset The offset to unset. */ #[ReturnTypeWillChange] public function offsetUnset( $offset ) { unset( $this->callbacks[ $offset ] ); } /** * Returns the current element. * * @since 4.7.0 * * @link https://www.php.net/manual/en/iterator.current.php * * @return array Of callbacks at current priority. */ #[ReturnTypeWillChange] public function current() { return current( $this->callbacks ); } /** * Moves forward to the next element. * * @since 4.7.0 * * @link https://www.php.net/manual/en/iterator.next.php * * @return array Of callbacks at next priority. */ #[ReturnTypeWillChange] public function next() { return next( $this->callbacks ); } /** * Returns the key of the current element. * * @since 4.7.0 * * @link https://www.php.net/manual/en/iterator.key.php * * @return mixed Returns current priority on success, or NULL on failure */ #[ReturnTypeWillChange] public function key() { return key( $this->callbacks ); } /** * Checks if current position is valid. * * @since 4.7.0 * * @link https://www.php.net/manual/en/iterator.valid.php * * @return bool Whether the current position is valid. */ #[ReturnTypeWillChange] public function valid() { return key( $this->callbacks ) !== null; } /** * Rewinds the Iterator to the first element. * * @since 4.7.0 * * @link https://www.php.net/manual/en/iterator.rewind.php */ #[ReturnTypeWillChange] public function rewind() { reset( $this->callbacks ); } }