11  * Schedules an event which will execute once by the WordPress actions core at

    11  * Schedules a hook which will be triggered by WordPress at the specified time.

    12  * a time which you specify. The action will fire off when someone visits your

    12  * The action will trigger when someone visits your WordPress site if the scheduled

    13  * WordPress site, if the schedule time has passed.

    13  * time has passed.

    19  * @since 2.1.0

    19  * Use wp_next_scheduled() to prevent duplicate events.

    20  *

    21  * Use wp_schedule_event() to schedule a recurring event.

    22  *

    23  * @since 2.1.0

    24  * @since 5.1.0 Return value modified to boolean indicating success or failure,

    25  *              {@see 'pre_schedule_event'} filter added to short-circuit the function.

    26  *

    22  * @param int $timestamp Unix timestamp (UTC) for when to run the event.

    29  * @param int    $timestamp  Unix timestamp (UTC) for when to next run the event.

    23  * @param string $hook Action hook to execute when event is run.

    30  * @param string $hook       Action hook to execute when the event is run.

    24  * @param array $args Optional. Arguments to pass to the hook's callback function.

    31  * @param array  $args       Optional. Array containing each separate argument to pass to the hook's callback function.

    25  * @return false|void False if the event does not get scheduled.

    32  * @return bool True if event successfully scheduled. False for failure.

    26  */

    33  */

    27 function wp_schedule_single_event( $timestamp, $hook, $args = array()) {

    34 function wp_schedule_single_event( $timestamp, $hook, $args = array() ) {

    33 	// Don't schedule a duplicate if there's already an identical event due within 10 minutes of it

    40 	$event = (object) array(

    34 	$next = wp_next_scheduled($hook, $args);

    41 		'hook'      => $hook,

    35 	if ( $next && abs( $next - $timestamp ) <= 10 * MINUTE_IN_SECONDS ) {

    42 		'timestamp' => $timestamp,

    36 		return false;

    43 		'schedule'  => false,

    37 	}

    44 		'args'      => $args,

    38 

    45 	);

    39 	$crons = _get_cron_array();

    46 

    40 	$event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args );

    47 	/**

    41 	/**

    48 	 * Filter to preflight or hijack scheduling an event.

    42 	 * Filters a single event before it is scheduled.

    49 	 *

    50 	 * Returning a non-null value will short-circuit adding the event to the

    51 	 * cron array, causing the function to return the filtered value instead.

    52 	 *

    53 	 * Both single events and recurring events are passed through this filter;

    54 	 * single events have `$event->schedule` as false, whereas recurring events

    55 	 * have this set to a recurrence from wp_get_schedules(). Recurring

    56 	 * events also have the integer recurrence interval set as `$event->interval`.

    57 	 *

    58 	 * For plugins replacing wp-cron, it is recommended you check for an

    59 	 * identical event within ten minutes and apply the {@see 'schedule_event'}

    60 	 * filter to check if another plugin has disallowed the event before scheduling.

    61 	 *

    62 	 * Return true if the event was scheduled, false if not.

    63 	 *

    64 	 * @since 5.1.0

    65 	 *

    66 	 * @param null|bool $pre   Value to return instead. Default null to continue adding the event.

    67 	 * @param stdClass  $event {

    68 	 *     An object containing an event's data.

    69 	 *

    70 	 *     @type string       $hook      Action hook to execute when the event is run.

    71 	 *     @type int          $timestamp Unix timestamp (UTC) for when to next run the event.

    72 	 *     @type string|false $schedule  How often the event should subsequently recur.

    73 	 *     @type array        $args      Array containing each separate argument to pass to the hook's callback function.

    74 	 *     @type int          $interval  The interval time in seconds for the schedule. Only present for recurring events.

    75 	 * }

    76 	 */

    77 	$pre = apply_filters( 'pre_schedule_event', null, $event );

    78 	if ( null !== $pre ) {

    79 		return $pre;

    80 	}

    81 

    82 	/*

    83 	 * Check for a duplicated event.

    84 	 *

    85 	 * Don't schedule an event if there's already an identical event

    86 	 * within 10 minutes.

    87 	 *

    88 	 * When scheduling events within ten minutes of the current time,

    89 	 * all past identical events are considered duplicates.

    90 	 *

    91 	 * When scheduling an event with a past timestamp (ie, before the

    92 	 * current time) all events scheduled within the next ten minutes

    93 	 * are considered duplicates.

    94 	 */

    95 	$crons     = (array) _get_cron_array();

    96 	$key       = md5( serialize( $event->args ) );

    97 	$duplicate = false;

    98 

    99 	if ( $event->timestamp < time() + 10 * MINUTE_IN_SECONDS ) {

   100 		$min_timestamp = 0;

   101 	} else {

   102 		$min_timestamp = $event->timestamp - 10 * MINUTE_IN_SECONDS;

   103 	}

   104 

   105 	if ( $event->timestamp < time() ) {

   106 		$max_timestamp = time() + 10 * MINUTE_IN_SECONDS;

   107 	} else {

   108 		$max_timestamp = $event->timestamp + 10 * MINUTE_IN_SECONDS;

   109 	}

   110 

   111 	foreach ( $crons as $event_timestamp => $cron ) {

   112 		if ( $event_timestamp < $min_timestamp ) {

   113 			continue;

   114 		}

   115 		if ( $event_timestamp > $max_timestamp ) {

   116 			break;

   117 		}

   118 		if ( isset( $cron[ $event->hook ][ $key ] ) ) {

   119 			$duplicate = true;

   120 			break;

   121 		}

   122 	}

   123 

   124 	if ( $duplicate ) {

   125 		return false;

   126 	}

   127 

   128 	/**

   129 	 * Modify an event before it is scheduled.

    49 	 *     @type string       $hook      Action hook to execute when event is run.

   136 	 *     @type string       $hook      Action hook to execute when the event is run.

    50 	 *     @type int          $timestamp Unix timestamp (UTC) for when to run the event.

   137 	 *     @type int          $timestamp Unix timestamp (UTC) for when to next run the event.

    51 	 *     @type string|false $schedule  How often the event should recur. See `wp_get_schedules()`.

   138 	 *     @type string|false $schedule  How often the event should subsequently recur.

    52 	 *     @type array        $args      Arguments to pass to the hook's callback function.

   139 	 *     @type array        $args      Array containing each separate argument to pass to the hook's callback function.

   140 	 *     @type int          $interval  The interval time in seconds for the schedule. Only present for recurring events.

    58 	if ( ! $event )

   146 	if ( ! $event ) {

    59 		return false;

   147 		return false;

    60 

   148 	}

    61 	$key = md5(serialize($event->args));

   149 

    62 

   150 	$crons[ $event->timestamp ][ $event->hook ][ $key ] = array(

    63 	$crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args );

   151 		'schedule' => $event->schedule,

    64 	uksort( $crons, "strnatcasecmp" );

   152 		'args'     => $event->args,

    65 	_set_cron_array( $crons );

   153 	);

    66 }

   154 	uksort( $crons, 'strnatcasecmp' );

    67 

   155 	return _set_cron_array( $crons );

    68 /**

   156 }

    69  * Schedule a recurring event.

   157 

    70  *

   158 /**

    71  * Schedules a hook which will be executed by the WordPress actions core on a

   159  * Schedules a recurring event.

    72  * specific interval, specified by you. The action will trigger when someone

   160  *

    73  * visits your WordPress site, if the scheduled time has passed.

   161  * Schedules a hook which will be triggered by WordPress at the specified interval.

    74  *

   162  * The action will trigger when someone visits your WordPress site if the scheduled

    75  * Valid values for the recurrence are hourly, daily, and twicedaily. These can

   163  * time has passed.

   164  *

   165  * Valid values for the recurrence are 'hourly', 'daily', and 'twicedaily'. These can

    78  * Use wp_next_scheduled() to prevent duplicates

   168  * Note that scheduling an event to occur within 10 minutes of an existing event

    79  *

   169  * with the same action hook will be ignored unless you pass unique `$args` values

    80  * @since 2.1.0

   170  * for each scheduled event.

    81  *

   171  *

    82  * @param int $timestamp Unix timestamp (UTC) for when to run the event.

   172  * Use wp_next_scheduled() to prevent duplicate events.

    83  * @param string $recurrence How often the event should recur.

   173  *

    84  * @param string $hook Action hook to execute when event is run.

   174  * Use wp_schedule_single_event() to schedule a non-recurring event.

    85  * @param array $args Optional. Arguments to pass to the hook's callback function.

   175  *

    86  * @return false|void False if the event does not get scheduled.

   176  * @since 2.1.0

    87  */

   177  * @since 5.1.0 Return value modified to boolean indicating success or failure,

    88 function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {

   178  *              {@see 'pre_schedule_event'} filter added to short-circuit the function.

   179  *

   180  * @link https://codex.wordpress.org/Function_Reference/wp_schedule_event

   181  *

   182  * @param int    $timestamp  Unix timestamp (UTC) for when to next run the event.

   183  * @param string $recurrence How often the event should subsequently recur. See wp_get_schedules() for accepted values.

   184  * @param string $hook       Action hook to execute when the event is run.

   185  * @param array  $args       Optional. Array containing each separate argument to pass to the hook's callback function.

   186  * @return bool True if event successfully scheduled. False for failure.

   187  */

   188 function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array() ) {

    97 	if ( !isset( $schedules[$recurrence] ) )

   196 	if ( ! isset( $schedules[ $recurrence ] ) ) {

    98 		return false;

   197 		return false;

    99 

   198 	}

   100 	$event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] );

   199 

   200 	$event = (object) array(

   201 		'hook'      => $hook,

   202 		'timestamp' => $timestamp,

   203 		'schedule'  => $recurrence,

   204 		'args'      => $args,

   205 		'interval'  => $schedules[ $recurrence ]['interval'],

   206 	);

   207 

   208 	/** This filter is documented in wp-includes/cron.php */

   209 	$pre = apply_filters( 'pre_schedule_event', null, $event );

   210 	if ( null !== $pre ) {

   211 		return $pre;

   212 	}

   213 

   105 	if ( ! $event )

   218 	if ( ! $event ) {

   106 		return false;

   219 		return false;

   107 

   220 	}

   108 	$key = md5(serialize($event->args));

   221 

   109 

   222 	$key = md5( serialize( $event->args ) );

   110 	$crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args, 'interval' => $event->interval );

   223 

   111 	uksort( $crons, "strnatcasecmp" );

   224 	$crons = _get_cron_array();

   112 	_set_cron_array( $crons );

   225 	$crons[ $event->timestamp ][ $event->hook ][ $key ] = array(

   113 }

   226 		'schedule' => $event->schedule,

   114 

   227 		'args'     => $event->args,

   115 /**

   228 		'interval' => $event->interval,

   116  * Reschedule a recurring event.

   229 	);

   117  *

   230 	uksort( $crons, 'strnatcasecmp' );

   118  * @since 2.1.0

   231 	return _set_cron_array( $crons );

   119  *

   232 }

   120  * @param int $timestamp Unix timestamp (UTC) for when to run the event.

   233 

   121  * @param string $recurrence How often the event should recur.

   234 /**

   122  * @param string $hook Action hook to execute when event is run.

   235  * Reschedules a recurring event.

   123  * @param array $args Optional. Arguments to pass to the hook's callback function.

   236  *

   124  * @return false|void False if the event does not get rescheduled.

   237  * Mainly for internal use, this takes the time stamp of a previously run

   238  * recurring event and reschedules it for its next run.

   239  *

   240  * To change upcoming scheduled events, use wp_schedule_event() to

   241  * change the recurrence frequency.

   242  *

   243  * @since 2.1.0

   244  * @since 5.1.0 Return value modified to boolean indicating success or failure,

   245  *              {@see 'pre_reschedule_event'} filter added to short-circuit the function.

   246  *

   247  * @param int    $timestamp  Unix timestamp (UTC) for when the event was scheduled.

   248  * @param string $recurrence How often the event should subsequently recur. See wp_get_schedules() for accepted values.

   249  * @param string $hook       Action hook to execute when the event is run.

   250  * @param array  $args       Optional. Array containing each separate argument to pass to the hook's callback function.

   251  * @return bool True if event successfully rescheduled. False for failure.

   134 	$key = md5( serialize( $args ) );

   260 	$interval  = 0;

   135 	$interval = 0;

   261 

   136 

   262 	// First we try to get the interval from the schedule.

   137 	// First we try to get it from the schedule

   141 	// Now we try to get it from the saved interval in case the schedule disappears

   266 

   142 	if ( 0 == $interval ) {

   267 	// Now we try to get it from the saved interval in case the schedule disappears.

   143 		$interval = $crons[ $timestamp ][ $hook ][ $key ]['interval'];

   268 	if ( 0 === $interval ) {

   144 	}

   269 		$scheduled_event = wp_get_scheduled_event( $hook, $args, $timestamp );

   270 		if ( $scheduled_event && isset( $scheduled_event->interval ) ) {

   271 			$interval = $scheduled_event->interval;

   272 		}

   273 	}

   274 

   275 	$event = (object) array(

   276 		'hook'      => $hook,

   277 		'timestamp' => $timestamp,

   278 		'schedule'  => $recurrence,

   279 		'args'      => $args,

   280 		'interval'  => $interval,

   281 	);

   282 

   283 	/**

   284 	 * Filter to preflight or hijack rescheduling of events.

   285 	 *

   286 	 * Returning a non-null value will short-circuit the normal rescheduling

   287 	 * process, causing the function to return the filtered value instead.

   288 	 *

   289 	 * For plugins replacing wp-cron, return true if the event was successfully

   290 	 * rescheduled, false if not.

   291 	 *

   292 	 * @since 5.1.0

   293 	 *

   294 	 * @param null|bool $pre   Value to return instead. Default null to continue adding the event.

   295 	 * @param stdClass  $event {

   296 	 *     An object containing an event's data.

   297 	 *

   298 	 *     @type string       $hook      Action hook to execute when the event is run.

   299 	 *     @type int          $timestamp Unix timestamp (UTC) for when to next run the event.

   300 	 *     @type string|false $schedule  How often the event should subsequently recur.

   301 	 *     @type array        $args      Array containing each separate argument to pass to the hook's callback function.

   302 	 *     @type int          $interval  The interval time in seconds for the schedule. Only present for recurring events.

   303 	 * }

   304 	 */

   305 	$pre = apply_filters( 'pre_reschedule_event', null, $event );

   306 	if ( null !== $pre ) {

   307 		return $pre;

   308 	}

   309 

   158 	wp_schedule_event( $timestamp, $recurrence, $hook, $args );

   323 	return wp_schedule_event( $timestamp, $recurrence, $hook, $args );

   168  *

   333  * @since 5.1.0 Return value modified to boolean indicating success or failure,

   169  * @param int $timestamp Unix timestamp (UTC) for when to run the event.

   334  *              {@see 'pre_unschedule_event'} filter added to short-circuit the function.

   170  * @param string $hook Action hook, the execution of which will be unscheduled.

   335  *

   171  * @param array $args Arguments to pass to the hook's callback function.

   336  * @param int    $timestamp Unix timestamp (UTC) of the event.

   172  * Although not passed to a callback function, these arguments are used

   337  * @param string $hook      Action hook of the event.

   173  * to uniquely identify the scheduled event, so they should be the same

   338  * @param array  $args      Optional. Array containing each separate argument to pass to the hook's callback function.

   174  * as those used when originally scheduling the event.

   339  *                          Although not passed to a callback, these arguments are used to uniquely identify the

   175  * @return false|void False if the event does not get unscheduled.

   340  *                          event, so they should be the same as those used when originally scheduling the event.

   341  * @return bool True if event successfully unscheduled. False for failure.

   184 	$key = md5(serialize($args));

   371 	$key   = md5( serialize( $args ) );

   185 	unset( $crons[$timestamp][$hook][$key] );

   372 	unset( $crons[ $timestamp ][ $hook ][ $key ] );

   186 	if ( empty($crons[$timestamp][$hook]) )

   373 	if ( empty( $crons[ $timestamp ][ $hook ] ) ) {

   187 		unset( $crons[$timestamp][$hook] );

   374 		unset( $crons[ $timestamp ][ $hook ] );

   188 	if ( empty($crons[$timestamp]) )

   375 	}

   189 		unset( $crons[$timestamp] );

   376 	if ( empty( $crons[ $timestamp ] ) ) {

   190 	_set_cron_array( $crons );

   377 		unset( $crons[ $timestamp ] );

   378 	}

   379 	return _set_cron_array( $crons );

   196  * @since 2.1.0

   385  * Warning: This function may return Boolean FALSE, but may also return a non-Boolean

   386  * value which evaluates to FALSE. For information about casting to booleans see the

   387  * {@link https://php.net/manual/en/language.types.boolean.php PHP documentation}. Use

   388  * the `===` operator for testing the return value of this function.

   389  *

   390  * @since 2.1.0

   391  * @since 5.1.0 Return value modified to indicate success or failure,

   392  *              {@see 'pre_clear_scheduled_hook'} filter added to short-circuit the function.

   204 	if ( !is_array($args) ) {

   403 	if ( ! is_array( $args ) ) {

   205 		_deprecated_argument( __FUNCTION__, '3.0.0', __('This argument has changed to an array to match the behavior of the other cron functions.') );

   404 		_deprecated_argument( __FUNCTION__, '3.0.0', __( 'This argument has changed to an array to match the behavior of the other cron functions.' ) );

   213 	if ( empty( $crons ) )

   433 	if ( empty( $crons ) ) {

   214 		return;

   434 		return 0;

   215 

   435 	}

   216 	$key = md5( serialize( $args ) );

   436 

   437 	$results = array();

   438 	$key     = md5( serialize( $args ) );

   219 			wp_unschedule_event( $timestamp, $hook, $args );

   441 			$results[] = wp_unschedule_event( $timestamp, $hook, $args );

   220 		}

   442 		}

   221 	}

   443 	}

   444 	if ( in_array( false, $results, true ) ) {

   445 		return false;

   446 	}

   447 	return count( $results );

   235 

   489 	if ( empty( $crons ) ) {

   236 	foreach( $crons as $timestamp => $args ) {

   490 		return 0;

   491 	}

   492 

   493 	$results = array();

   494 	foreach ( $crons as $timestamp => $args ) {

   495 		if ( ! empty( $crons[ $timestamp ][ $hook ] ) ) {

   496 			$results[] = count( $crons[ $timestamp ][ $hook ] );

   497 		}

   244 	_set_cron_array( $crons );

   505 	/*

   506 	 * If the results are empty (zero events to unschedule), no attempt

   507 	 * to update the cron array is required.

   508 	 */

   509 	if ( empty( $results ) ) {

   510 		return 0;

   511 	}

   512 	if ( _set_cron_array( $crons ) ) {

   513 		return array_sum( $results );

   514 	}

   515 	return false;

   516 }

   517 

   518 /**

   519  * Retrieve a scheduled event.

   520  *

   521  * Retrieve the full event object for a given event, if no timestamp is specified the next

   522  * scheduled event is returned.

   523  *

   524  * @since 5.1.0

   525  *

   526  * @param string   $hook      Action hook of the event.

   527  * @param array    $args      Optional. Array containing each separate argument to pass to the hook's callback function.

   528  *                            Although not passed to a callback, these arguments are used to uniquely identify the

   529  *                            event, so they should be the same as those used when originally scheduling the event.

   530  * @param int|null $timestamp Optional. Unix timestamp (UTC) of the event. If not specified, the next scheduled event is returned.

   531  * @return bool|object The event object. False if the event does not exist.

   532  */

   533 function wp_get_scheduled_event( $hook, $args = array(), $timestamp = null ) {

   534 	/**

   535 	 * Filter to preflight or hijack retrieving a scheduled event.

   536 	 *

   537 	 * Returning a non-null value will short-circuit the normal process,

   538 	 * returning the filtered value instead.

   539 	 *

   540 	 * Return false if the event does not exist, otherwise an event object

   541 	 * should be returned.

   542 	 *

   543 	 * @since 5.1.0

   544 	 *

   545 	 * @param null|bool $pre       Value to return instead. Default null to continue retrieving the event.

   546 	 * @param string    $hook      Action hook of the event.

   547 	 * @param array     $args      Array containing each separate argument to pass to the hook's callback function.

   548 	 *                             Although not passed to a callback, these arguments are used to uniquely identify the

   549 	 *                             event.

   550 	 * @param int|null  $timestamp Unix timestamp (UTC) of the event. Null to retrieve next scheduled event.

   551 	 */

   552 	$pre = apply_filters( 'pre_get_scheduled_event', null, $hook, $args, $timestamp );

   553 	if ( null !== $pre ) {

   554 		return $pre;

   555 	}

   556 

   557 	if ( null !== $timestamp && ! is_numeric( $timestamp ) ) {

   558 		return false;

   559 	}

   560 

   561 	$crons = _get_cron_array();

   562 	if ( empty( $crons ) ) {

   563 		return false;

   564 	}

   565 

   566 	$key = md5( serialize( $args ) );

   567 

   568 	if ( ! $timestamp ) {

   569 		// Get next event.

   570 		$next = false;

   571 		foreach ( $crons as $timestamp => $cron ) {

   572 			if ( isset( $cron[ $hook ][ $key ] ) ) {

   573 				$next = $timestamp;

   574 				break;

   575 			}

   576 		}

   577 		if ( ! $next ) {

   578 			return false;

   579 		}

   580 

   581 		$timestamp = $next;

   582 	} elseif ( ! isset( $crons[ $timestamp ][ $hook ][ $key ] ) ) {

   583 		return false;

   584 	}

   585 

   586 	$event = (object) array(

   587 		'hook'      => $hook,

   588 		'timestamp' => $timestamp,

   589 		'schedule'  => $crons[ $timestamp ][ $hook ][ $key ]['schedule'],

   590 		'args'      => $args,

   591 	);

   592 

   593 	if ( isset( $crons[ $timestamp ][ $hook ][ $key ]['interval'] ) ) {

   594 		$event->interval = $crons[ $timestamp ][ $hook ][ $key ]['interval'];

   595 	}

   596 

   597 	return $event;

   252  * @param string $hook Action hook to execute when event is run.

   605  * @param string $hook Action hook of the event.

   253  * @param array $args Optional. Arguments to pass to the hook's callback function.

   606  * @param array  $args Optional. Array containing each separate argument to pass to the hook's callback function.

   254  * @return false|int The Unix timestamp of the next time the scheduled event will occur.

   607  *                     Although not passed to a callback, these arguments are used to uniquely identify the

   608  *                     event, so they should be the same as those used when originally scheduling the event.

   609  * @return false|int The Unix timestamp of the next time the event will occur. False if the event doesn't exist.

   257 	$crons = _get_cron_array();

   612 	$next_event = wp_get_scheduled_event( $hook, $args );

   258 	$key = md5(serialize($args));

   613 	if ( ! $next_event ) {

   259 	if ( empty($crons) )

   614 		return false;

   260 		return false;

   615 	}

   261 	foreach ( $crons as $timestamp => $cron ) {

   616 

   262 		if ( isset( $cron[$hook][$key] ) )

   617 	return $next_event->timestamp;

   263 			return $timestamp;

   264 	}

   265 	return false;

   276 	if ( ! $gmt_time )

   630 	if ( ! $gmt_time ) {

   278 

   632 	}

   279 	if ( defined('DOING_CRON') || isset($_GET['doing_wp_cron']) )

   633 

   280 		return;

   634 	if ( defined( 'DOING_CRON' ) || isset( $_GET['doing_wp_cron'] ) ) {

   635 		return false;

   636 	}

   289 	$lock = get_transient('doing_cron');

   645 	$lock = get_transient( 'doing_cron' );

   290 

   646 

   291 	if ( $lock > $gmt_time + 10 * MINUTE_IN_SECONDS )

   647 	if ( $lock > $gmt_time + 10 * MINUTE_IN_SECONDS ) {

   295 	if ( $lock + WP_CRON_LOCK_TIMEOUT > $gmt_time )

   652 	if ( $lock + WP_CRON_LOCK_TIMEOUT > $gmt_time ) {

   296 		return;

   653 		return false;

   654 	}

   299 	$crons = _get_cron_array();

   657 	$crons = wp_get_ready_cron_jobs();

   300 	if ( !is_array($crons) )

   658 	if ( empty( $crons ) ) {

   301 		return;

   659 		return false;

   660 	}

   304 	if ( isset($keys[0]) && $keys[0] > $gmt_time )

   663 	if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) {

   305 		return;

   664 		return false;

   665 	}

   308 		if ( 'GET' !== $_SERVER['REQUEST_METHOD'] || defined( 'DOING_AJAX' ) ||  defined( 'XMLRPC_REQUEST' ) ) {

   668 		if ( 'GET' !== $_SERVER['REQUEST_METHOD'] || defined( 'DOING_AJAX' ) || defined( 'XMLRPC_REQUEST' ) ) {

   309 			return;

   669 			return false;

   320 		while ( @ob_end_flush() );

   680 		while ( @ob_end_flush() ) {

   681 		}

   324 		return;

   685 		return true;

   352 	$cron_request = apply_filters( 'cron_request', array(

   713 	$cron_request = apply_filters(

   353 		'url'  => add_query_arg( 'doing_wp_cron', $doing_wp_cron, site_url( 'wp-cron.php' ) ),

   714 		'cron_request',

   354 		'key'  => $doing_wp_cron,

   715 		array(

   355 		'args' => array(

   716 			'url'  => add_query_arg( 'doing_wp_cron', $doing_wp_cron, site_url( 'wp-cron.php' ) ),

   356 			'timeout'   => 0.01,

   717 			'key'  => $doing_wp_cron,

   357 			'blocking'  => false,

   718 			'args' => array(

   358 			/** This filter is documented in wp-includes/class-wp-http-streams.php */

   719 				'timeout'   => 0.01,

   359 			'sslverify' => apply_filters( 'https_local_ssl_verify', false )

   720 				'blocking'  => false,

   360 		)

   721 				/** This filter is documented in wp-includes/class-wp-http-streams.php */

   361 	), $doing_wp_cron );

   722 				'sslverify' => apply_filters( 'https_local_ssl_verify', false ),

   362 

   723 			),

   363 	wp_remote_post( $cron_request['url'], $cron_request['args'] );

   724 		),

   725 		$doing_wp_cron

   726 	);

   727 

   728 	$result = wp_remote_post( $cron_request['url'], $cron_request['args'] );

   729 	return ! is_wp_error( $result );

   369  * @since 2.1.0

   735  * Warning: This function may return Boolean FALSE, but may also return a non-Boolean

   736  * value which evaluates to FALSE. For information about casting to booleans see the

   737  * {@link https://php.net/manual/en/language.types.boolean.php PHP documentation}. Use

   738  * the `===` operator for testing the return value of this function.

   739  *

   740  * @since 2.1.0

   741  * @since 5.1.0 Return value added to indicate success or failure.

   742  *

   743  * @return bool|int On success an integer indicating number of events spawned (0 indicates no

   744  *                  events needed to be spawned), false if spawning fails for one or more events.

   373 	if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false || ( defined('DISABLE_WP_CRON') && DISABLE_WP_CRON ) )

   748 	if ( strpos( $_SERVER['REQUEST_URI'], '/wp-cron.php' ) !== false || ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) ) {

   374 		return;

   749 		return 0;

   375 

   750 	}

   376 	if ( false === $crons = _get_cron_array() )

   751 

   377 		return;

   752 	$crons = wp_get_ready_cron_jobs();

   753 	if ( empty( $crons ) ) {

   754 		return 0;

   755 	}

   380 	$keys = array_keys( $crons );

   758 	$keys     = array_keys( $crons );

   381 	if ( isset($keys[0]) && $keys[0] > $gmt_time )

   759 	if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) {

   382 		return;

   760 		return 0;

   761 	}

   386 		if ( $timestamp > $gmt_time ) break;

   766 		if ( $timestamp > $gmt_time ) {

   767 			break;

   768 		}

   388 			if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )

   770 			if ( isset( $schedules[ $hook ]['callback'] ) && ! call_user_func( $schedules[ $hook ]['callback'] ) ) {

   390 			spawn_cron( $gmt_time );

   772 			}

   773 			$results[] = spawn_cron( $gmt_time );

   418  *     	   'display'  => __( 'Once Weekly' )

   806  *         'display'  => __( 'Once Weekly' )

   428 		'hourly'     => array( 'interval' => HOUR_IN_SECONDS,      'display' => __( 'Once Hourly' ) ),

   815 		'hourly'     => array(

   429 		'twicedaily' => array( 'interval' => 12 * HOUR_IN_SECONDS, 'display' => __( 'Twice Daily' ) ),

   816 			'interval' => HOUR_IN_SECONDS,

   430 		'daily'      => array( 'interval' => DAY_IN_SECONDS,       'display' => __( 'Once Daily' ) ),

   817 			'display'  => __( 'Once Hourly' ),

   818 		),

   819 		'twicedaily' => array(

   820 			'interval' => 12 * HOUR_IN_SECONDS,

   821 			'display'  => __( 'Twice Daily' ),

   822 		),

   823 		'daily'      => array(

   824 			'interval' => DAY_IN_SECONDS,

   825 			'display'  => __( 'Once Daily' ),

   826 		),

   453 function wp_get_schedule($hook, $args = array()) {

   850 function wp_get_schedule( $hook, $args = array() ) {

   851 	$schedule = false;

   852 	$event    = wp_get_scheduled_event( $hook, $args );

   853 

   854 	if ( $event ) {

   855 		$schedule = $event->schedule;

   856 	}

   857 

   858 	/**

   859 	 * Filter the schedule for a hook.

   860 	 *

   861 	 * @since 5.1.0

   862 	 *

   863 	 * @param string|bool $schedule Schedule for the hook. False if not found.

   864 	 * @param string      $hook     Action hook to execute when cron is run.

   865 	 * @param array       $args     Optional. Arguments to pass to the hook's callback function.

   866 	 */

   867 	return apply_filters( 'get_schedule', $schedule, $hook, $args );

   868 }

   869 

   870 /**

   871  * Retrieve cron jobs ready to be run.

   872  *

   873  * Returns the results of _get_cron_array() limited to events ready to be run,

   874  * ie, with a timestamp in the past.

   875  *

   876  * @since 5.1.0

   877  *

   878  * @return array Cron jobs ready to be run.

   879  */

   880 function wp_get_ready_cron_jobs() {

   881 	/**

   882 	 * Filter to preflight or hijack retrieving ready cron jobs.

   883 	 *

   884 	 * Returning an array will short-circuit the normal retrieval of ready

   885 	 * cron jobs, causing the function to return the filtered value instead.

   886 	 *

   887 	 * @since 5.1.0

   888 	 *

   889 	 * @param null|array $pre Array of ready cron tasks to return instead. Default null

   890 	 *                        to continue using results from _get_cron_array().

   891 	 */

   892 	$pre = apply_filters( 'pre_get_ready_cron_jobs', null );

   893 	if ( null !== $pre ) {

   894 		return $pre;

   895 	}

   896 

   455 	$key = md5(serialize($args));

   898 

   456 	if ( empty($crons) )

   899 	if ( false === $crons ) {

   457 		return false;

   900 		return array();

   458 	foreach ( $crons as $timestamp => $cron ) {

   901 	}

   459 		if ( isset( $cron[$hook][$key] ) )

   902 

   460 			return $cron[$hook][$key]['schedule'];

   903 	$gmt_time = microtime( true );

   461 	}

   904 	$keys     = array_keys( $crons );

   462 	return false;

   905 	if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) {

   906 		return array();

   907 	}

   908 

   909 	$results = array();

   910 	foreach ( $crons as $timestamp => $cronhooks ) {

   911 		if ( $timestamp > $gmt_time ) {

   912 			break;

   913 		}

   914 		$results[ $timestamp ] = $cronhooks;

   915 	}

   916 

   917 	return $results;

   477 function _get_cron_array()  {

   932 function _get_cron_array() {

   478 	$cron = get_option('cron');

   933 	$cron = get_option( 'cron' );

   479 	if ( ! is_array($cron) )

   934 	if ( ! is_array( $cron ) ) {

   480 		return false;

   935 		return false;

   481 

   936 	}

   482 	if ( !isset($cron['version']) )

   937 

   483 		$cron = _upgrade_cron_array($cron);

   938 	if ( ! isset( $cron['version'] ) ) {

   484 

   939 		$cron = _upgrade_cron_array( $cron );

   485 	unset($cron['version']);

   940 	}

   941 

   942 	unset( $cron['version'] );

   497  */

   956  * @return bool True if cron array updated, false on failure.

   498 function _set_cron_array($cron) {

   957  */

   958 function _set_cron_array( $cron ) {

   500 	update_option( 'cron', $cron );

   960 	return update_option( 'cron', $cron );

   514 function _upgrade_cron_array($cron) {

   974 function _upgrade_cron_array( $cron ) {

   515 	if ( isset($cron['version']) && 2 == $cron['version'])

   975 	if ( isset( $cron['version'] ) && 2 == $cron['version'] ) {

   520 	foreach ( (array) $cron as $timestamp => $hooks) {

   981 	foreach ( (array) $cron as $timestamp => $hooks ) {

   522 			$key = md5(serialize($args['args']));

   983 			$key                                     = md5( serialize( $args['args'] ) );

   523 			$new_cron[$timestamp][$hook][$key] = $args;

   984 			$new_cron[ $timestamp ][ $hook ][ $key ] = $args;