/**
* Schedules a hook to run only once.
*
- * Schedules a hook which will be executed once by the Wordpress actions core at
+ * Schedules a hook which will be executed once by the WordPress actions core at
* a time which you specify. The action will fire off when someone visits your
* WordPress site, if the schedule time has passed.
*
function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
// don't schedule a duplicate if there's already an identical event due in the next 10 minutes
$next = wp_next_scheduled($hook, $args);
- if ( $next && $next <= $timestamp + 600 )
+ if ( $next && $next <= $timestamp + 10 * MINUTE_IN_SECONDS )
return;
$crons = _get_cron_array();
- $key = md5(serialize($args));
- $crons[$timestamp][$hook][$key] = array( 'schedule' => false, 'args' => $args );
+ $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args );
+ /**
+ * Filter a single event before it is scheduled.
+ *
+ * @since 3.1.0
+ *
+ * @param object $event An object containing an event's data.
+ */
+ $event = apply_filters( 'schedule_event', $event );
+
+ // A plugin disallowed this event
+ if ( ! $event )
+ return false;
+
+ $key = md5(serialize($event->args));
+
+ $crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args );
uksort( $crons, "strnatcasecmp" );
_set_cron_array( $crons );
}
* specific interval, specified by you. 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 cron_schedules filter in wp_get_schedules().
+ *
+ * Use wp_next_scheduled() to prevent duplicates
+ *
* @since 2.1.0
*
* @param int $timestamp Timestamp for when to run the event.
function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {
$crons = _get_cron_array();
$schedules = wp_get_schedules();
- $key = md5(serialize($args));
+
if ( !isset( $schedules[$recurrence] ) )
return false;
- $crons[$timestamp][$hook][$key] = array( 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] );
+
+ $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] );
+ /** This filter is documented in wp-includes/cron.php */
+ $event = apply_filters( 'schedule_event', $event );
+
+ // A plugin disallowed this event
+ if ( ! $event )
+ return false;
+
+ $key = md5(serialize($event->args));
+
+ $crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args, 'interval' => $event->interval );
uksort( $crons, "strnatcasecmp" );
_set_cron_array( $crons );
}
* @param array $args Optional. Arguments to pass to the hook's callback function.
* @return bool|null False on failure. Null when event is rescheduled.
*/
-function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array()) {
+function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array() ) {
$crons = _get_cron_array();
$schedules = wp_get_schedules();
- $key = md5(serialize($args));
+ $key = md5( serialize( $args ) );
$interval = 0;
// First we try to get it from the schedule
- if ( 0 == $interval )
- $interval = $schedules[$recurrence]['interval'];
+ 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 )
- $interval = $crons[$timestamp][$hook][$key]['interval'];
+ if ( 0 == $interval ) {
+ $interval = $crons[ $timestamp ][ $hook ][ $key ]['interval'];
+ }
// Now we assume something is wrong and fail to schedule
- if ( 0 == $interval )
+ if ( 0 == $interval ) {
return false;
+ }
+
+ $now = time();
- while ( $timestamp < time() + 1 )
- $timestamp += $interval;
+ if ( $timestamp >= $now ) {
+ $timestamp = $now + $interval;
+ } else {
+ $timestamp = $now + ( $interval - ( ( $now - $timestamp ) % $interval ) );
+ }
wp_schedule_event( $timestamp, $recurrence, $hook, $args );
}
* @since 2.1.0
*
* @param string $hook Action hook, the execution of which will be unscheduled.
- * @param mixed $args,... Optional. Event arguments.
+ * @param array $args Optional. Arguments that were to be pass to the hook's callback function.
*/
-function wp_clear_scheduled_hook( $hook ) {
- $args = array_slice( func_get_args(), 1 );
+function wp_clear_scheduled_hook( $hook, $args = array() ) {
+ // Backward compatibility
+ // Previously this function took the arguments as discrete vars rather than an array like the rest of the API
+ if ( !is_array($args) ) {
+ _deprecated_argument( __FUNCTION__, '3.0', __('This argument has changed to an array to match the behavior of the other cron functions.') );
+ $args = array_slice( func_get_args(), 1 );
+ }
+
+ // 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;
- while ( $timestamp = wp_next_scheduled( $hook, $args ) )
- wp_unschedule_event( $timestamp, $hook, $args );
+ $key = md5( serialize( $args ) );
+ foreach ( $crons as $timestamp => $cron ) {
+ if ( isset( $cron[ $hook ][ $key ] ) ) {
+ wp_unschedule_event( $timestamp, $hook, $args );
+ }
+ }
}
/**
*
* @return null Cron could not be spawned, because it is not needed to run.
*/
-function spawn_cron( $local_time ) {
+function spawn_cron( $gmt_time = 0 ) {
+
+ if ( ! $gmt_time )
+ $gmt_time = microtime( true );
+
+ if ( defined('DOING_CRON') || isset($_GET['doing_wp_cron']) )
+ return;
/*
- * do not even start the cron if local server timer has drifted
- * such as due to power failure, or misconfiguration
- */
- $timer_accurate = check_server_timer( $local_time );
- if ( !$timer_accurate )
+ * multiple processes on multiple web servers can run this code concurrently
+ * try to make this as atomic as possible by setting doing_cron switch
+ */
+ $lock = 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;
//sanity check
return;
$keys = array_keys( $crons );
- $timestamp = $keys[0];
- if ( $timestamp > $local_time )
+ if ( isset($keys[0]) && $keys[0] > $gmt_time )
return;
- $cron_url = get_option( 'siteurl' ) . '/wp-cron.php?check=' . wp_hash('187425');
- /*
- * multiple processes on multiple web servers can run this code concurrently
- * try to make this as atomic as possible by setting doing_cron switch
- */
- $flag = get_option('doing_cron');
+ if ( defined('ALTERNATE_WP_CRON') && ALTERNATE_WP_CRON ) {
+ if ( !empty($_POST) || defined('DOING_AJAX') )
+ return;
- // clean up potential invalid value resulted from various system chaos
- if ( $flag != 0 ) {
- if ( $flag > $local_time + 10*60 || $flag < $local_time - 10*60 ) {
- update_option('doing_cron', 0);
- $flag = 0;
- }
- }
+ $doing_wp_cron = sprintf( '%.22F', $gmt_time );
+ set_transient( 'doing_cron', $doing_wp_cron );
- //don't run if another process is currently running it
- if ( $flag > $local_time )
- return;
+ ob_start();
+ wp_redirect( add_query_arg( 'doing_wp_cron', $doing_wp_cron, wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
+ echo ' ';
- update_option( 'doing_cron', $local_time + 30 );
+ // flush any buffers and send the headers
+ while ( @ob_end_flush() );
+ flush();
- wp_remote_post($cron_url, array('timeout' => 0.01, 'blocking' => false));
+ WP_DEBUG ? include_once( ABSPATH . 'wp-cron.php' ) : @include_once( ABSPATH . 'wp-cron.php' );
+ return;
+ }
+
+ $doing_wp_cron = sprintf( '%.22F', $gmt_time );
+ set_transient( 'doing_cron', $doing_wp_cron );
+
+ /**
+ * Filter the cron request arguments.
+ *
+ * @since 3.5.0
+ *
+ * @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.
+ * }
+ * }
+ */
+ $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-http.php */
+ 'sslverify' => apply_filters( 'https_local_ssl_verify', false )
+ )
+ ) );
+
+ wp_remote_post( $cron_request['url'], $cron_request['args'] );
}
/**
function wp_cron() {
// Prevent infinite loops caused by lack of wp-cron.php
- if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false )
+ if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false || ( defined('DISABLE_WP_CRON') && DISABLE_WP_CRON ) )
return;
- $crons = _get_cron_array();
-
- if ( !is_array($crons) )
+ if ( false === $crons = _get_cron_array() )
return;
+ $gmt_time = microtime( true );
$keys = array_keys( $crons );
- if ( isset($keys[0]) && $keys[0] > time() )
+ if ( isset($keys[0]) && $keys[0] > $gmt_time )
return;
- $local_time = time();
$schedules = wp_get_schedules();
foreach ( $crons as $timestamp => $cronhooks ) {
- if ( $timestamp > $local_time ) break;
+ if ( $timestamp > $gmt_time ) break;
foreach ( (array) $cronhooks as $hook => $args ) {
if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
continue;
- spawn_cron( $local_time );
+ spawn_cron( $gmt_time );
break 2;
}
}
*/
function wp_get_schedules() {
$schedules = array(
- 'hourly' => array( 'interval' => 3600, 'display' => __('Once Hourly') ),
- 'twicedaily' => array( 'interval' => 43200, 'display' => __('Twice Daily') ),
- 'daily' => array( 'interval' => 86400, 'display' => __('Once Daily') ),
+ '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' ) ),
);
+ /**
+ * Filter the non-default cron schedules.
+ *
+ * @since 2.1.0
+ *
+ * @param array $new_schedules An array of non-default cron schedules. Default empty.
+ */
return array_merge( apply_filters( 'cron_schedules', array() ), $schedules );
}
update_option( 'cron', $new_cron );
return $new_cron;
}
-
-// stub for checking server timer accuracy, using outside standard time sources
-function check_server_timer( $local_time ) {
- return true;
-}
-
-?>
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