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/** * WordPress Cron API * * @package WordPress */ /** * Schedules an event to run only once. * * Schedules a hook which will be triggered by WordPress at the specified UTC time. * The action will trigger when someone visits your WordPress site if the scheduled * time has passed. * * Note that scheduling an event to occur within 10 minutes of an existing event * with the same action hook will be ignored unless you pass unique `$args` values * for each scheduled event. * * Use wp_next_scheduled() to prevent duplicate events. * * Use wp_schedule_event() to schedule a recurring event. * * @since 2.1.0 * @since 5.1.0 Return value modified to boolean indicating success or failure, * {@see 'pre_schedule_event'} filter added to short-circuit the function. * @since 5.7.0 The `$wp_error` parameter was added. * * @link https://developer.wordpress.org/reference/functions/wp_schedule_single_event/ * * @param int $timestamp Unix timestamp (UTC) for when to next run the event. * @param string $hook Action hook to execute when the event is run. * @param array $args Optional. Array containing arguments to pass to the * hook's callback function. Each value in the array * is passed to the callback as an individual parameter. * The array keys are ignored. Default empty array. * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return bool|WP_Error True if event successfully scheduled. False or WP_Error on failure. */ function wp_schedule_single_event( $timestamp, $hook, $args = array(), $wp_error = false ) { // Make sure timestamp is a positive integer. if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) { if ( $wp_error ) { return new WP_Error( 'invalid_timestamp', __( 'Event timestamp must be a valid Unix timestamp.' ) ); } return false; } $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args, ); /** * Filter to override scheduling an event. * * Returning a non-null value will short-circuit adding the event to the * cron array, causing the function to return the filtered value instead. * * Both single events and recurring events are passed through this filter; * single events have `$event->schedule` as false, whereas recurring events * have this set to a recurrence from wp_get_schedules(). Recurring * events also have the integer recurrence interval set as `$event->interval`. * * For plugins replacing wp-cron, it is recommended you check for an * identical event within ten minutes and apply the {@see 'schedule_event'} * filter to check if another plugin has disallowed the event before scheduling. * * Return true if the event was scheduled, false or a WP_Error if not. * * @since 5.1.0 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned. * * @param null|bool|WP_Error $result The value to return instead. Default null to continue adding the event. * @param object $event { * An object containing an event's data. * * @type string $hook Action hook to execute when the event is run. * @type int $timestamp Unix timestamp (UTC) for when to next run the event. * @type string|false $schedule How often the event should subsequently recur. * @type array $args Array containing each separate argument to pass to the hook's callback function. * @type int $interval Optional. The interval time in seconds for the schedule. Only present for recurring events. * } * @param bool $wp_error Whether to return a WP_Error on failure. */ $pre = apply_filters( 'pre_schedule_event', null, $event, $wp_error ); if ( null !== $pre ) { if ( $wp_error && false === $pre ) { return new WP_Error( 'pre_schedule_event_false', __( 'A plugin prevented the event from being scheduled.' ) ); } if ( ! $wp_error && is_wp_error( $pre ) ) { return false; } return $pre; } /* * Check for a duplicated event. * * Don't schedule an event if there's already an identical event * within 10 minutes. * * When scheduling events within ten minutes of the current time, * all past identical events are considered duplicates. * * When scheduling an event with a past timestamp (ie, before the * current time) all events scheduled within the next ten minutes * are considered duplicates. */ $crons = _get_cron_array(); $key = md5( serialize( $event->args ) ); $duplicate = false; if ( $event->timestamp < time() + 10 * MINUTE_IN_SECONDS ) { $min_timestamp = 0; } else { $min_timestamp = $event->timestamp - 10 * MINUTE_IN_SECONDS; } if ( $event->timestamp < time() ) { $max_timestamp = time() + 10 * MINUTE_IN_SECONDS; } else { $max_timestamp = $event->timestamp + 10 * MINUTE_IN_SECONDS; } foreach ( $crons as $event_timestamp => $cron ) { if ( $event_timestamp < $min_timestamp ) { continue; } if ( $event_timestamp > $max_timestamp ) { break; } if ( isset( $cron[ $event->hook ][ $key ] ) ) { $duplicate = true; break; } } if ( $duplicate ) { if ( $wp_error ) { return new WP_Error( 'duplicate_event', __( 'A duplicate event already exists.' ) ); } return false; } /** * Modify an event before it is scheduled. * * @since 3.1.0 * * @param object|false $event { * An object containing an event's data, or boolean false to prevent the event from being scheduled. * * @type string $hook Action hook to execute when the event is run. * @type int $timestamp Unix timestamp (UTC) for when to next run the event. * @type string|false $schedule How often the event should subsequently recur. * @type array $args Array containing each separate argument to pass to the hook's callback function. * @type int $interval Optional. The interval time in seconds for the schedule. Only present for recurring events. * } */ $event = apply_filters( 'schedule_event', $event ); // A plugin disallowed this event. if ( ! $event ) { if ( $wp_error ) { return new WP_Error( 'schedule_event_false', __( 'A plugin disallowed this event.' ) ); } return false; } $crons[ $event->timestamp ][ $event->hook ][ $key ] = array( 'schedule' => $event->schedule, 'args' => $event->args, ); uksort( $crons, 'strnatcasecmp' ); return _set_cron_array( $crons, $wp_error ); } /** * Schedules a recurring event. * * Schedules a hook which will be triggered by WordPress at the specified interval. * The action will trigger when someone visits your WordPress site if the scheduled * time has passed. * * Valid values for the recurrence are 'hourly', 'daily', and 'twicedaily'. These can * be extended using the {@see 'cron_schedules'} filter in wp_get_schedules(). * * Use wp_next_scheduled() to prevent duplicate events. * * Use wp_schedule_single_event() to schedule a non-recurring event. * * @since 2.1.0 * @since 5.1.0 Return value modified to boolean indicating success or failure, * {@see 'pre_schedule_event'} filter added to short-circuit the function. * @since 5.7.0 The `$wp_error` parameter was added. * * @link https://developer.wordpress.org/reference/functions/wp_schedule_event/ * * @param int $timestamp Unix timestamp (UTC) for when to next run the event. * @param string $recurrence How often the event should subsequently recur. * See wp_get_schedules() for accepted values. * @param string $hook Action hook to execute when the event is run. * @param array $args Optional. Array containing arguments to pass to the * hook's callback function. Each value in the array * is passed to the callback as an individual parameter. * The array keys are ignored. Default empty array. * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return bool|WP_Error True if event successfully scheduled. False or WP_Error on failure. */ function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array(), $wp_error = false ) { // Make sure timestamp is a positive integer. if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) { if ( $wp_error ) { return new WP_Error( 'invalid_timestamp', __( 'Event timestamp must be a valid Unix timestamp.' ) ); } return false; } $schedules = wp_get_schedules(); if ( ! isset( $schedules[ $recurrence ] ) ) { if ( $wp_error ) { return new WP_Error( 'invalid_schedule', __( 'Event schedule does not exist.' ) ); } return false; } $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[ $recurrence ]['interval'], ); /** This filter is documented in wp-includes/cron.php */ $pre = apply_filters( 'pre_schedule_event', null, $event, $wp_error ); if ( null !== $pre ) { if ( $wp_error && false === $pre ) { return new WP_Error( 'pre_schedule_event_false', __( 'A plugin prevented the event from being scheduled.' ) ); } if ( ! $wp_error && is_wp_error( $pre ) ) { return false; } return $pre; } /** This filter is documented in wp-includes/cron.php */ $event = apply_filters( 'schedule_event', $event ); // A plugin disallowed this event. if ( ! $event ) { if ( $wp_error ) { return new WP_Error( 'schedule_event_false', __( 'A plugin disallowed this event.' ) ); } return false; } $key = md5( serialize( $event->args ) ); $crons = _get_cron_array(); $crons[ $event->timestamp ][ $event->hook ][ $key ] = array( 'schedule' => $event->schedule, 'args' => $event->args, 'interval' => $event->interval, ); uksort( $crons, 'strnatcasecmp' ); return _set_cron_array( $crons, $wp_error ); } /** * Reschedules a recurring event. * * Mainly for internal use, this takes the UTC timestamp of a previously run * recurring event and reschedules it for its next run. * * To change upcoming scheduled events, use wp_schedule_event() to * change the recurrence frequency. * * @since 2.1.0 * @since 5.1.0 Return value modified to boolean indicating success or failure, * {@see 'pre_reschedule_event'} filter added to short-circuit the function. * @since 5.7.0 The `$wp_error` parameter was added. * * @param int $timestamp Unix timestamp (UTC) for when the event was scheduled. * @param string $recurrence How often the event should subsequently recur. * See wp_get_schedules() for accepted values. * @param string $hook Action hook to execute when the event is run. * @param array $args Optional. Array containing arguments to pass to the * hook's callback function. Each value in the array * is passed to the callback as an individual parameter. * The array keys are ignored. Default empty array. * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return bool|WP_Error True if event successfully rescheduled. False or WP_Error on failure. */ function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array(), $wp_error = false ) { // Make sure timestamp is a positive integer. if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) { if ( $wp_error ) { return new WP_Error( 'invalid_timestamp', __( 'Event timestamp must be a valid Unix timestamp.' ) ); } return false; } $schedules = wp_get_schedules(); $interval = 0; // First we try to get the interval from the schedule. if ( isset( $schedules[ $recurrence ] ) ) { $interval = $schedules[ $recurrence ]['interval']; } // Now we try to get it from the saved interval in case the schedule disappears. if ( 0 === $interval ) { $scheduled_event = wp_get_scheduled_event( $hook, $args, $timestamp ); if ( $scheduled_event && isset( $scheduled_event->interval ) ) { $interval = $scheduled_event->interval; } } $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $interval, ); /** * Filter to override rescheduling of a recurring event. * * Returning a non-null value will short-circuit the normal rescheduling * process, causing the function to return the filtered value instead. * * For plugins replacing wp-cron, return true if the event was successfully * rescheduled, false or a WP_Error if not. * * @since 5.1.0 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned. * * @param null|bool|WP_Error $pre Value to return instead. Default null to continue adding the event. * @param object $event { * An object containing an event's data. * * @type string $hook Action hook to execute when the event is run. * @type int $timestamp Unix timestamp (UTC) for when to next run the event. * @type string $schedule How often the event should subsequently recur. * @type array $args Array containing each separate argument to pass to the hook's callback function. * @type int $interval The interval time in seconds for the schedule. * } * @param bool $wp_error Whether to return a WP_Error on failure. */ $pre = apply_filters( 'pre_reschedule_event', null, $event, $wp_error ); if ( null !== $pre ) { if ( $wp_error && false === $pre ) { return new WP_Error( 'pre_reschedule_event_false', __( 'A plugin prevented the event from being rescheduled.' ) ); } if ( ! $wp_error && is_wp_error( $pre ) ) { return false; } return $pre; } // Now we assume something is wrong and fail to schedule. if ( 0 === $interval ) { if ( $wp_error ) { return new WP_Error( 'invalid_schedule', __( 'Event schedule does not exist.' ) ); } return false; } $now = time(); if ( $timestamp >= $now ) { $timestamp = $now + $interval; } else { $timestamp = $now + ( $interval - ( ( $now - $timestamp ) % $interval ) ); } return wp_schedule_event( $timestamp, $recurrence, $hook, $args, $wp_error ); } /** * Unschedules a previously scheduled event. * * The `$timestamp` and `$hook` parameters are required so that the event can be * identified. * * @since 2.1.0 * @since 5.1.0 Return value modified to boolean indicating success or failure, * {@see 'pre_unschedule_event'} filter added to short-circuit the function. * @since 5.7.0 The `$wp_error` parameter was added. * * @param int $timestamp Unix timestamp (UTC) of the event. * @param string $hook Action hook of the event. * @param array $args Optional. Array containing each separate argument to pass to the hook's callback function. * Although not passed to a callback, these arguments are used to uniquely identify the * event, so they should be the same as those used when originally scheduling the event. * Default empty array. * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return bool|WP_Error True if event successfully unscheduled. False or WP_Error on failure. */ function wp_unschedule_event( $timestamp, $hook, $args = array(), $wp_error = false ) { // Make sure timestamp is a positive integer. if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) { if ( $wp_error ) { return new WP_Error( 'invalid_timestamp', __( 'Event timestamp must be a valid Unix timestamp.' ) ); } return false; } /** * Filter to override unscheduling of events. * * Returning a non-null value will short-circuit the normal unscheduling * process, causing the function to return the filtered value instead. * * For plugins replacing wp-cron, return true if the event was successfully * unscheduled, false or a WP_Error if not. * * @since 5.1.0 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned. * * @param null|bool|WP_Error $pre Value to return instead. Default null to continue unscheduling the event. * @param int $timestamp Timestamp for when to run the event. * @param string $hook Action hook, the execution of which will be unscheduled. * @param array $args Arguments to pass to the hook's callback function. * @param bool $wp_error Whether to return a WP_Error on failure. */ $pre = apply_filters( 'pre_unschedule_event', null, $timestamp, $hook, $args, $wp_error ); if ( null !== $pre ) { if ( $wp_error && false === $pre ) { return new WP_Error( 'pre_unschedule_event_false', __( 'A plugin prevented the event from being unscheduled.' ) ); } if ( ! $wp_error && is_wp_error( $pre ) ) { return false; } return $pre; } $crons = _get_cron_array(); $key = md5( serialize( $args ) ); unset( $crons[ $timestamp ][ $hook ][ $key ] ); if ( empty( $crons[ $timestamp ][ $hook ] ) ) { unset( $crons[ $timestamp ][ $hook ] ); } if ( empty( $crons[ $timestamp ] ) ) { unset( $crons[ $timestamp ] ); } return _set_cron_array( $crons, $wp_error ); } /** * Unschedules all events attached to the hook with the specified arguments. * * Warning: This function may return boolean false, but may also return a non-boolean * value which evaluates to false. For information about casting to booleans see the * {@link https://www.php.net/manual/en/language.types.boolean.php PHP documentation}. Use * the `===` operator for testing the return value of this function. * * @since 2.1.0 * @since 5.1.0 Return value modified to indicate success or failure, * {@see 'pre_clear_scheduled_hook'} filter added to short-circuit the function. * @since 5.7.0 The `$wp_error` parameter was added. * * @param string $hook Action hook, the execution of which will be unscheduled. * @param array $args Optional. Array containing each separate argument to pass to the hook's callback function. * Although not passed to a callback, these arguments are used to uniquely identify the * event, so they should be the same as those used when originally scheduling the event. * Default empty array. * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return int|false|WP_Error On success an integer indicating number of events unscheduled (0 indicates no * events were registered with the hook and arguments combination), false or WP_Error * if unscheduling one or more events fail. */ function wp_clear_scheduled_hook( $hook, $args = array(), $wp_error = false ) { /* * Backward compatibility. * Previously, this function took the arguments as discrete vars rather than an array like the rest of the API. */ if ( ! is_array( $args ) ) { _deprecated_argument( __FUNCTION__, '3.0.0', __( 'This argument has changed to an array to match the behavior of the other cron functions.' ) ); $args = array_slice( func_get_args(), 1 ); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection $wp_error = false; } /** * Filter to override clearing a scheduled hook. * * Returning a non-null value will short-circuit the normal unscheduling * process, causing the function to return the filtered value instead. * * For plugins replacing wp-cron, return the number of events successfully * unscheduled (zero if no events were registered with the hook) or false * or a WP_Error if unscheduling one or more events fails. * * @since 5.1.0 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned. * * @param null|int|false|WP_Error $pre Value to return instead. Default null to continue unscheduling the event. * @param string $hook Action hook, the execution of which will be unscheduled. * @param array $args Arguments to pass to the hook's callback function. * @param bool $wp_error Whether to return a WP_Error on failure. */ $pre = apply_filters( 'pre_clear_scheduled_hook', null, $hook, $args, $wp_error ); if ( null !== $pre ) { if ( $wp_error && false === $pre ) { return new WP_Error( 'pre_clear_scheduled_hook_false', __( 'A plugin prevented the hook from being cleared.' ) ); } if ( ! $wp_error && is_wp_error( $pre ) ) { return false; } return $pre; } /* * This logic duplicates wp_next_scheduled(). * It's required due to a scenario where wp_unschedule_event() fails due to update_option() failing, * and, wp_next_scheduled() returns the same schedule in an infinite loop. */ $crons = _get_cron_array(); if ( empty( $crons ) ) { return 0; } $results = array(); $key = md5( serialize( $args ) ); foreach ( $crons as $timestamp => $cron ) { if ( isset( $cron[ $hook ][ $key ] ) ) { $results[] = wp_unschedule_event( $timestamp, $hook, $args, true ); } } $errors = array_filter( $results, 'is_wp_error' ); $error = new WP_Error(); if ( $errors ) { if ( $wp_error ) { array_walk( $errors, array( $error, 'merge_from' ) ); return $error; } return false; } return count( $results ); } /** * Unschedules all events attached to the hook. * * Can be useful for plugins when deactivating to clean up the cron queue. * * Warning: This function may return boolean false, but may also return a non-boolean * value which evaluates to false. For information about casting to booleans see the * {@link https://www.php.net/manual/en/language.types.boolean.php PHP documentation}. Use * the `===` operator for testing the return value of this function. * * @since 4.9.0 * @since 5.1.0 Return value added to indicate success or failure. * @since 5.7.0 The `$wp_error` parameter was added. * * @param string $hook Action hook, the execution of which will be unscheduled. * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return int|false|WP_Error On success an integer indicating number of events unscheduled (0 indicates no * events were registered on the hook), false or WP_Error if unscheduling fails. */ function wp_unschedule_hook( $hook, $wp_error = false ) { /** * Filter to override clearing all events attached to the hook. * * Returning a non-null value will short-circuit the normal unscheduling * process, causing the function to return the filtered value instead. * * For plugins replacing wp-cron, return the number of events successfully * unscheduled (zero if no events were registered with the hook) or false * if unscheduling one or more events fails. * * @since 5.1.0 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned. * * @param null|int|false|WP_Error $pre Value to return instead. Default null to continue unscheduling the hook. * @param string $hook Action hook, the execution of which will be unscheduled. * @param bool $wp_error Whether to return a WP_Error on failure. */ $pre = apply_filters( 'pre_unschedule_hook', null, $hook, $wp_error ); if ( null !== $pre ) { if ( $wp_error && false === $pre ) { return new WP_Error( 'pre_unschedule_hook_false', __( 'A plugin prevented the hook from being cleared.' ) ); } if ( ! $wp_error && is_wp_error( $pre ) ) { return false; } return $pre; } $crons = _get_cron_array(); if ( empty( $crons ) ) { return 0; } $results = array(); foreach ( $crons as $timestamp => $args ) { if ( ! empty( $crons[ $timestamp ][ $hook ] ) ) { $results[] = count( $crons[ $timestamp ][ $hook ] ); } unset( $crons[ $timestamp ][ $hook ] ); if ( empty( $crons[ $timestamp ] ) ) { unset( $crons[ $timestamp ] ); } } /* * If the results are empty (zero events to unschedule), no attempt * to update the cron array is required. */ if ( empty( $results ) ) { return 0; } $set = _set_cron_array( $crons, $wp_error ); if ( true === $set ) { return array_sum( $results ); } return $set; } /** * Retrieves a scheduled event. * * Retrieves the full event object for a given event, if no timestamp is specified the next * scheduled event is returned. * * @since 5.1.0 * * @param string $hook Action hook of the event. * @param array $args Optional. Array containing each separate argument to pass to the hook's callback function. * Although not passed to a callback, these arguments are used to uniquely identify the * event, so they should be the same as those used when originally scheduling the event. * Default empty array. * @param int|null $timestamp Optional. Unix timestamp (UTC) of the event. If not specified, the next scheduled event * is returned. Default null. * @return object|false { * The event object. False if the event does not exist. * * @type string $hook Action hook to execute when the event is run. * @type int $timestamp Unix timestamp (UTC) for when to next run the event. * @type string|false $schedule How often the event should subsequently recur. * @type array $args Array containing each separate argument to pass to the hook's callback function. * @type int $interval Optional. The interval time in seconds for the schedule. Only present for recurring events. * } */ function wp_get_scheduled_event( $hook, $args = array(), $timestamp = null ) { /** * Filter to override retrieving a scheduled event. * * Returning a non-null value will short-circuit the normal process, * returning the filtered value instead. * * Return false if the event does not exist, otherwise an event object * should be returned. * * @since 5.1.0 * * @param null|false|object $pre Value to return instead. Default null to continue retrieving the event. * @param string $hook Action hook of the event. * @param array $args Array containing each separate argument to pass to the hook's callback function. * Although not passed to a callback, these arguments are used to uniquely identify * the event. * @param int|null $timestamp Unix timestamp (UTC) of the event. Null to retrieve next scheduled event. */ $pre = apply_filters( 'pre_get_scheduled_event', null, $hook, $args, $timestamp ); if ( null !== $pre ) { return $pre; } if ( null !== $timestamp && ! is_numeric( $timestamp ) ) { return false; } $crons = _get_cron_array(); if ( empty( $crons ) ) { return false; } $key = md5( serialize( $args ) ); if ( ! $timestamp ) { // Get next event. $next = false; foreach ( $crons as $timestamp => $cron ) { if ( isset( $cron[ $hook ][ $key ] ) ) { $next = $timestamp; break; } } if ( ! $next ) { return false; } $timestamp = $next; } elseif ( ! isset( $crons[ $timestamp ][ $hook ][ $key ] ) ) { return false; } $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $crons[ $timestamp ][ $hook ][ $key ]['schedule'], 'args' => $args, ); if ( isset( $crons[ $timestamp ][ $hook ][ $key ]['interval'] ) ) { $event->interval = $crons[ $timestamp ][ $hook ][ $key ]['interval']; } return $event; } /** * Retrieves the next timestamp for an event. * * @since 2.1.0 * * @param string $hook Action hook of the event. * @param array $args Optional. Array containing each separate argument to pass to the hook's callback function. * Although not passed to a callback, these arguments are used to uniquely identify the * event, so they should be the same as those used when originally scheduling the event. * Default empty array. * @return int|false The Unix timestamp of the next time the event will occur. False if the event doesn't exist. */ function wp_next_scheduled( $hook, $args = array() ) { $next_event = wp_get_scheduled_event( $hook, $args ); if ( ! $next_event ) { return false; } return $next_event->timestamp; } /** * Sends a request to run cron through HTTP request that doesn't halt page loading. * * @since 2.1.0 * @since 5.1.0 Return values added. * * @param int $gmt_time Optional. Unix timestamp (UTC). Default 0 (current time is used). * @return bool True if spawned, false if no events spawned. */ function spawn_cron( $gmt_time = 0 ) { if ( ! $gmt_time ) { $gmt_time = microtime( true ); } if ( defined( 'DOING_CRON' ) || isset( $_GET['doing_wp_cron'] ) ) { return false; } /* * Get the cron lock, which is a Unix timestamp of when the last cron was spawned * and has not finished running. * * Multiple processes on multiple web servers can run this code concurrently, * this lock attempts to make spawning as atomic as possible. */ $lock = (float) get_transient( 'doing_cron' ); if ( $lock > $gmt_time + 10 * MINUTE_IN_SECONDS ) { $lock = 0; } // Don't run if another process is currently running it or more than once every 60 sec. if ( $lock + WP_CRON_LOCK_TIMEOUT > $gmt_time ) { return false; } // Sanity check. $crons = wp_get_ready_cron_jobs(); if ( empty( $crons ) ) { return false; } $keys = array_keys( $crons ); if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) { return false; } if ( defined( 'ALTERNATE_WP_CRON' ) && ALTERNATE_WP_CRON ) { if ( 'GET' !== $_SERVER['REQUEST_METHOD'] || defined( 'DOING_AJAX' ) || defined( 'XMLRPC_REQUEST' ) ) { return false; } $doing_wp_cron = sprintf( '%.22F', $gmt_time ); set_transient( 'doing_cron', $doing_wp_cron ); ob_start(); wp_redirect( add_query_arg( 'doing_wp_cron', $doing_wp_cron, wp_unslash( $_SERVER['REQUEST_URI'] ) ) ); echo ' '; // Flush any buffers and send the headers. wp_ob_end_flush_all(); flush(); require_once ABSPATH . 'wp-cron.php'; return true; } // Set the cron lock with the current unix timestamp, when the cron is being spawned. $doing_wp_cron = sprintf( '%.22F', $gmt_time ); set_transient( 'doing_cron', $doing_wp_cron ); /** * Filters the cron request arguments. * * @since 3.5.0 * @since 4.5.0 The `$doing_wp_cron` parameter was added. * * @param array $cron_request_array { * An array of cron request URL arguments. * * @type string $url The cron request URL. * @type int $key The 22 digit GMT microtime. * @type array $args { * An array of cron request arguments. * * @type int $timeout The request timeout in seconds. Default .01 seconds. * @type bool $blocking Whether to set blocking for the request. Default false. * @type bool $sslverify Whether SSL should be verified for the request. Default false. * } * } * @param string $doing_wp_cron The unix timestamp of the cron lock. */ $cron_request = apply_filters( 'cron_request', array( 'url' => add_query_arg( 'doing_wp_cron', $doing_wp_cron, site_url( 'wp-cron.php' ) ), 'key' => $doing_wp_cron, 'args' => array( 'timeout' => 0.01, 'blocking' => false, /** This filter is documented in wp-includes/class-wp-http-streams.php */ 'sslverify' => apply_filters( 'https_local_ssl_verify', false ), ), ), $doing_wp_cron ); $result = wp_remote_post( $cron_request['url'], $cron_request['args'] ); return ! is_wp_error( $result ); } /** * Registers _wp_cron() to run on the {@see 'wp_loaded'} action. * * If the {@see 'wp_loaded'} action has already fired, this function calls * _wp_cron() directly. * * Warning: This function may return Boolean FALSE, but may also return a non-Boolean * value which evaluates to FALSE. For information about casting to booleans see the * {@link https://www.php.net/manual/en/language.types.boolean.php PHP documentation}. Use * the `===` operator for testing the return value of this function. * * @since 2.1.0 * @since 5.1.0 Return value added to indicate success or failure. * @since 5.7.0 Functionality moved to _wp_cron() to which this becomes a wrapper. * * @return false|int|void On success an integer indicating number of events spawned (0 indicates no * events needed to be spawned), false if spawning fails for one or more events or * void if the function registered _wp_cron() to run on the action. */ function wp_cron() { if ( did_action( 'wp_loaded' ) ) { return _wp_cron(); } add_action( 'wp_loaded', '_wp_cron', 20 ); } /** * Runs scheduled callbacks or spawns cron for all scheduled events. * * Warning: This function may return Boolean FALSE, but may also return a non-Boolean * value which evaluates to FALSE. For information about casting to booleans see the * {@link https://www.php.net/manual/en/language.types.boolean.php PHP documentation}. Use * the `===` operator for testing the return value of this function. * * @since 5.7.0 * @access private * * @return int|false On success an integer indicating number of events spawned (0 indicates no * events needed to be spawned), false if spawning fails for one or more events. */ function _wp_cron() { // Prevent infinite loops caused by lack of wp-cron.php. if ( str_contains( $_SERVER['REQUEST_URI'], '/wp-cron.php' ) || ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) ) { return 0; } $crons = wp_get_ready_cron_jobs(); if ( empty( $crons ) ) { return 0; } $gmt_time = microtime( true ); $keys = array_keys( $crons ); if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) { return 0; } $schedules = wp_get_schedules(); $results = array(); foreach ( $crons as $timestamp => $cronhooks ) { if ( $timestamp > $gmt_time ) { break; } foreach ( (array) $cronhooks as $hook => $args ) { if ( isset( $schedules[ $hook ]['callback'] ) && ! call_user_func( $schedules[ $hook ]['callback'] ) ) { continue; } $results[] = spawn_cron( $gmt_time ); break 2; } } if ( in_array( false, $results, true ) ) { return false; } return count( $results ); } /** * Retrieves supported event recurrence schedules. * * The default supported recurrences are 'hourly', 'twicedaily', 'daily', and 'weekly'. * A plugin may add more by hooking into the {@see 'cron_schedules'} filter. * The filter accepts an array of arrays. The outer array has a key that is the name * of the schedule, for example 'monthly'. The value is an array with two keys, * one is 'interval' and the other is 'display'. * * The 'interval' is a number in seconds of when the cron job should run. * So for 'hourly' the time is `HOUR_IN_SECONDS` (60 * 60 or 3600). For 'monthly', * the value would be `MONTH_IN_SECONDS` (30 * 24 * 60 * 60 or 2592000). * * The 'display' is the description. For the 'monthly' key, the 'display' * would be `__( 'Once Monthly' )`. * * For your plugin, you will be passed an array. You can easily add your * schedule by doing the following. * * // Filter parameter variable name is 'array'. * $array['monthly'] = array( * 'interval' => MONTH_IN_SECONDS, * 'display' => __( 'Once Monthly' ) * ); * * @since 2.1.0 * @since 5.4.0 The 'weekly' schedule was added. * * @return array { * The array of cron schedules keyed by the schedule name. * * @type array ...$0 { * Cron schedule information. * * @type int $interval The schedule interval in seconds. * @type string $display The schedule display name. * } * } */ function wp_get_schedules() { $schedules = array( 'hourly' => array( 'interval' => HOUR_IN_SECONDS, 'display' => __( 'Once Hourly' ), ), 'twicedaily' => array( 'interval' => 12 * HOUR_IN_SECONDS, 'display' => __( 'Twice Daily' ), ), 'daily' => array( 'interval' => DAY_IN_SECONDS, 'display' => __( 'Once Daily' ), ), 'weekly' => array( 'interval' => WEEK_IN_SECONDS, 'display' => __( 'Once Weekly' ), ), ); /** * Filters the non-default cron schedules. * * @since 2.1.0 * * @param array $new_schedules { * An array of non-default cron schedules keyed by the schedule name. Default empty array. * * @type array ...$0 { * Cron schedule information. * * @type int $interval The schedule interval in seconds. * @type string $display The schedule display name. * } * } */ return array_merge( apply_filters( 'cron_schedules', array() ), $schedules ); } /** * Retrieves the name of the recurrence schedule for an event. * * @see wp_get_schedules() for available schedules. * * @since 2.1.0 * @since 5.1.0 {@see 'get_schedule'} filter added. * * @param string $hook Action hook to identify the event. * @param array $args Optional. Arguments passed to the event's callback function. * Default empty array. * @return string|false Schedule name on success, false if no schedule. */ function wp_get_schedule( $hook, $args = array() ) { $schedule = false; $event = wp_get_scheduled_event( $hook, $args ); if ( $event ) { $schedule = $event->schedule; } /** * Filters the schedule name for a hook. * * @since 5.1.0 * * @param string|false $schedule Schedule for the hook. False if not found. * @param string $hook Action hook to execute when cron is run. * @param array $args Arguments to pass to the hook's callback function. */ return apply_filters( 'get_schedule', $schedule, $hook, $args ); } /** * Retrieves cron jobs ready to be run. * * Returns the results of _get_cron_array() limited to events ready to be run, * ie, with a timestamp in the past. * * @since 5.1.0 * * @return array[] Array of cron job arrays ready to be run. */ function wp_get_ready_cron_jobs() { /** * Filter to override retrieving ready cron jobs. * * Returning an array will short-circuit the normal retrieval of ready * cron jobs, causing the function to return the filtered value instead. * * @since 5.1.0 * * @param null|array[] $pre Array of ready cron tasks to return instead. Default null * to continue using results from _get_cron_array(). */ $pre = apply_filters( 'pre_get_ready_cron_jobs', null ); if ( null !== $pre ) { return $pre; } $crons = _get_cron_array(); $gmt_time = microtime( true ); $results = array(); foreach ( $crons as $timestamp => $cronhooks ) { if ( $timestamp > $gmt_time ) { break; } $results[ $timestamp ] = $cronhooks; } return $results; } // // Private functions. // /** * Retrieves cron info array option. * * @since 2.1.0 * @since 6.1.0 Return type modified to consistently return an array. * @access private * * @return array[] Array of cron events. */ function _get_cron_array() { $cron = get_option( 'cron' ); if ( ! is_array( $cron ) ) { return array(); } if ( ! isset( $cron['version'] ) ) { $cron = _upgrade_cron_array( $cron ); } unset( $cron['version'] ); return $cron; } /** * Updates the cron option with the new cron array. * * @since 2.1.0 * @since 5.1.0 Return value modified to outcome of update_option(). * @since 5.7.0 The `$wp_error` parameter was added. * * @access private * * @param array[] $cron Array of cron info arrays from _get_cron_array(). * @param bool $wp_error Optional. Whether to return a WP_Error on failure. Default false. * @return bool|WP_Error True if cron array updated. False or WP_Error on failure. */ function _set_cron_array( $cron, $wp_error = false ) { if ( ! is_array( $cron ) ) { $cron = array(); } $cron['version'] = 2; $result = update_option( 'cron', $cron ); if ( $wp_error && ! $result ) { return new WP_Error( 'could_not_set', __( 'The cron event list could not be saved.' ) ); } return $result; } /** * Upgrades a cron info array. * * This function upgrades the cron info array to version 2. * * @since 2.1.0 * @access private * * @param array $cron Cron info array from _get_cron_array(). * @return array An upgraded cron info array. */ function _upgrade_cron_array( $cron ) { if ( isset( $cron['version'] ) && 2 === $cron['version'] ) { return $cron; } $new_cron = array(); foreach ( (array) $cron as $timestamp => $hooks ) { foreach ( (array) $hooks as $hook => $args ) { $key = md5( serialize( $args['args'] ) ); $new_cron[ $timestamp ][ $hook ][ $key ] = $args; } } $new_cron['version'] = 2; update_option( 'cron', $new_cron ); return $new_cron; }
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