enmi-conf.org: comparison wp/wp-includes/cron.php

equal deleted inserted replaced

-:7b1b88e27a20
+:48c4eec2b7e6
 */
 /**
 * Schedules an event to run only once.
 *
-* Schedules a hook which will be triggered by WordPress at the specified time.
+* 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
 		'schedule'  => false,
 		'args'      => $args,
 	);
 	/**
-	 * Filter to preflight or hijack scheduling an event.
+	 * Filter to override scheduling an event.
 	 *
 	 * Returning a non-null value will short-circuit adding the event to the
 	 * cron array, causing the function to return the filtered value instead.
 	 *
 	 * Both single events and recurring events are passed through this filter;
 	 * Return true if the event was scheduled, false or a WP_Error if not.
 	 *
 	 * @since 5.1.0
 	 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned.
 	 *
-	 * @param null|bool|WP_Error $pre      Value to return instead. Default null to continue adding the event.
+	 * @param null|bool|WP_Error $result   The value to return instead. Default null to continue adding the event.
-	 * @param stdClass           $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  The interval time in seconds for the schedule. Only present for recurring events.
+	 *     @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 );
 	 * 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();
-	if ( ! is_array( $crons ) ) {
-		$crons = array();
-	}
 	$key       = md5( serialize( $event->args ) );
 	$duplicate = false;
 	if ( $event->timestamp < time() + 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;
 		}
 	}
 	/**
 	 * Modify an event before it is scheduled.
 	 *
 	 * @since 3.1.0
 	 *
-	 * @param stdClass|false $event {
+	 * @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  The interval time in seconds for the schedule. Only present for recurring events.
+	 *     @type int          $interval  Optional. The interval time in seconds for the schedule. Only present for recurring events.
 	 * }
 	 */
 	$event = apply_filters( 'schedule_event', $event );
 	// A plugin disallowed this event.
 *
 * Schedules a hook which will be triggered by WordPress at the specified interval.
 * The action will trigger when someone visits your WordPress site if the scheduled
 * time has passed.
 *
-* Valid values for the recurrence are 'hourly', 'daily', and 'twicedaily'. These can
+* Valid values for the recurrence are 'hourly', 'twicedaily', 'daily', and 'weekly'.
-* be extended using the {@see 'cron_schedules'} filter in wp_get_schedules().
+* These can be extended using the {@see 'cron_schedules'} filter in wp_get_schedules().
-*
-* Note that scheduling an event to occur within 10 minutes of an existing event
-* with the same action hook will be ignored unless you pass unique `$args` values
-* for each scheduled event.
 *
 * Use wp_next_scheduled() to prevent duplicate events.
 *
 * Use wp_schedule_single_event() to schedule a non-recurring event.
 *
 	}
 	$key = md5( serialize( $event->args ) );
 	$crons = _get_cron_array();
-	if ( ! is_array( $crons ) ) {
-		$crons = array();
-	}
 	$crons[ $event->timestamp ][ $event->hook ][ $key ] = array(
 		'schedule' => $event->schedule,
 		'args'     => $event->args,
 		'interval' => $event->interval,
 }
 /**
 * Reschedules a recurring event.
 *
-* Mainly for internal use, this takes the time stamp of a previously run
+* 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.
 *
 	}
 	// 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;
 		}
 	}
 		'args'      => $args,
 		'interval'  => $interval,
 	);
 	/**
-	 * Filter to preflight or hijack rescheduling of events.
+	 * Filter to override rescheduling of a recurring event.
 	 *
 	 * Returning a non-null value will short-circuit the normal rescheduling
 	 * process, causing the function to return the filtered value instead.
 	 *
 	 * For plugins replacing wp-cron, return true if the event was successfully
-	 * rescheduled, false if not.
+	 * rescheduled, false or a WP_Error if not.
 	 *
 	 * @since 5.1.0
 	 * @since 5.7.0 The `$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 stdClass           $event    {
+	 * @param object             $event    {
 	 *     An object containing an event's data.
 	 *
-	 *     @type string       $hook      Action hook to execute when the event is run.
+	 *     @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 int    $timestamp Unix timestamp (UTC) for when to next run the event.
-	 *     @type string|false $schedule  How often the event should subsequently recur.
+	 *     @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 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. Only present for recurring events.
+	 *     @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 );
 		return $pre;
 	}
 	// Now we assume something is wrong and fail to schedule.
-	if ( 0 == $interval ) {
+	if ( 0 === $interval ) {
 		if ( $wp_error ) {
 			return new WP_Error(
 				'invalid_schedule',
 				__( 'Event schedule does not exist.' )
 			);
 	return wp_schedule_event( $timestamp, $recurrence, $hook, $args, $wp_error );
 }
 /**
-* Unschedule a previously scheduled event.
+* Unschedules a previously scheduled event.
 *
-* The $timestamp and $hook parameters are required so that the event can be
+* The `$timestamp` and `$hook` parameters are required so that the event can be
 * identified.
 *
 * @since 2.1.0
 * @since 5.1.0 Return value modified to boolean indicating success or failure,
 *              {@see 'pre_unschedule_event'} filter added to short-circuit the function.
 		return false;
 	}
 	/**
-	 * Filter to preflight or hijack unscheduling of events.
+	 * Filter to override unscheduling of events.
 	 *
 	 * Returning a non-null value will short-circuit the normal unscheduling
 	 * process, causing the function to return the filtered value instead.
 	 *
 	 * For plugins replacing wp-cron, return true if the event was successfully
-	 * unscheduled, false if not.
+	 * unscheduled, false or a WP_Error if not.
 	 *
 	 * @since 5.1.0
 	 * @since 5.7.0 The `$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.
 		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
+* 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
+* 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,
 * @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.
+	 * 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.' ) );
+		_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
 		$wp_error = false;
 	}
 	/**
-	 * Filter to preflight or hijack clearing a scheduled hook.
+	 * Filter to override clearing a scheduled hook.
 	 *
 	 * Returning a non-null value will short-circuit the normal unscheduling
 	 * process, causing the function to return the filtered value instead.
 	 *
 	 * For plugins replacing wp-cron, return the number of events successfully
 	 * unscheduled (zero if no events were registered with the hook) or false
-	 * if unscheduling one or more events fails.
+	 * or a WP_Error if unscheduling one or more events fails.
 	 *
 	 * @since 5.1.0
 	 * @since 5.7.0 The `$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.
 /**
 * 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
+* 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
+* 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.
 * @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, $wp_error = false ) {
 	/**
-	 * Filter to preflight or hijack clearing all events attached to the hook.
+	 * Filter to override clearing all events attached to the hook.
 	 *
 	 * Returning a non-null value will short-circuit the normal unscheduling
 	 * process, causing the function to return the filtered value instead.
 	 *
 	 * For plugins replacing wp-cron, return the number of events successfully
-	 * unscheduled (zero if no events were registered with the hook) or false
+	 * unscheduled (zero if no events were registered with the hook). If unscheduling
-	 * if unscheduling one or more events fails.
+	 * one or more events fails then return either a WP_Error object or false depending
+	 * on the value of the `$wp_error` parameter.
 	 *
 	 * @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.
 	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 ] );
 		}
 	return $set;
 }
 /**
-* Retrieve a scheduled event.
+* Retrieves a scheduled event.
 *
-* Retrieve the full event object for a given event, if no timestamp is specified the next
+* 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.
 *                            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.
+* @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 preflight or hijack retrieving a scheduled event.
+	 * 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
 	 *                                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 ) ) {
 			if ( isset( $cron[ $hook ][ $key ] ) ) {
 				$next = $timestamp;
 				break;
 			}
 		}
 		if ( ! $next ) {
 			return false;
 		}
 		$timestamp = $next;
 	return $event;
 }
 /**
-* Retrieve the next timestamp for an 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.
 *                     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;
 	 * 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 = get_transient( 'doing_cron' );
+	$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.
+	// Confidence check.
 	$crons = wp_get_ready_cron_jobs();
 	if ( empty( $crons ) ) {
 		return false;
 	}
 		// Flush any buffers and send the headers.
 		wp_ob_end_flush_all();
 		flush();
-		include_once ABSPATH . 'wp-cron.php';
+		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 );
 		),
 		$doing_wp_cron
 	);
 	$result = wp_remote_post( $cron_request['url'], $cron_request['args'] );
 	return ! is_wp_error( $result );
 }
 /**
-* Register _wp_cron() to run on the {@see 'wp_loaded'} action.
+* 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
 *
 * @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 bool|int|void On success an integer indicating number of events spawned (0 indicates no
+* @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
+*                        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.
+*                        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 );
 }
 /**
-* Run scheduled callbacks or spawn cron for all scheduled events.
+* 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.
 * @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 ( strpos( $_SERVER['REQUEST_URI'], '/wp-cron.php' ) !== false || ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) ) {
+	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;
 	}
 	$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'] ) ) {
+			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 );
 }
 /**
-* Retrieve supported event recurrence schedules.
+* 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',
+* 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 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
+* For your plugin, you will be passed an array. You can add your
-* schedule by doing the following.
+* 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[]
+* @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,
 	/**
 	 * Filters the non-default cron schedules.
 	 *
 	 * @since 2.1.0
 	 *
-	 * @param array[] $new_schedules An array of non-default cron schedule arrays. Default empty.
+	 * @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 );
 }
 /**
-* Retrieve the recurrence schedule for an event.
+* 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.
 	if ( $event ) {
 		$schedule = $event->schedule;
 	}
 	/**
-	 * Filters the schedule for a hook.
+	 * 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.
 	 */
 	return apply_filters( 'get_schedule', $schedule, $hook, $args );
 }
 /**
-* Retrieve cron jobs ready to be run.
+* 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 preflight or hijack retrieving 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();
+	$crons    = _get_cron_array();
-	if ( ! is_array( $crons ) ) {
-		return array();
-	}
 	$gmt_time = microtime( true );
-	$keys     = array_keys( $crons );
+	$results  = array();
-	if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) {
-		return array();
-	}
-	$results = array();
 	foreach ( $crons as $timestamp => $cronhooks ) {
 		if ( $timestamp > $gmt_time ) {
 			break;
 		}
 		$results[ $timestamp ] = $cronhooks;
 	}
 	return $results;
 }
 //
 // Private functions.
 //
 /**
-* Retrieve cron info array option.
+* 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[]|false Array of cron info arrays on success, false on failure.
+* @return array[] Array of cron events.
 */
 function _get_cron_array() {
 	$cron = get_option( 'cron' );
 	if ( ! is_array( $cron ) ) {
-		return false;
+		return array();
 	}
 	if ( ! isset( $cron['version'] ) ) {
 		$cron = _upgrade_cron_array( $cron );
 	}
 	if ( ! is_array( $cron ) ) {
 		$cron = array();
 	}
 	$cron['version'] = 2;
-	$result          = update_option( 'cron', $cron );
+	$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;
 }
 /**
-* Upgrade a Cron info array.
+* Upgrades a cron info array.
 *
-* This function upgrades the Cron info array to version 2.
+* 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.
+* @return array An upgraded cron info array.
 */
 function _upgrade_cron_array( $cron ) {
-	if ( isset( $cron['version'] ) && 2 == $cron['version'] ) {
+	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'] ) );
+			$key = md5( serialize( $args['args'] ) );
 			$new_cron[ $timestamp ][ $hook ][ $key ] = $args;
 		}
 	}
 	$new_cron['version'] = 2;
 	update_option( 'cron', $new_cron );
 	return $new_cron;
 }

changeset 21	48c4eec2b7e6
parent 19	3d72ae0968f4
child 22	8c2e4d02f4ef