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File: /home/vacationcoursesc/public_html/wp-includes/cron.php
<?php

function wp_schedule_single_event($timestamp, $hook, $args = array(), $wp_error = false)
{
    if (!is_numeric($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);
    $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;
    }
    $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;
    }
    $event = apply_filters('schedule_event', $event);
    if (!$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, $wp_error);
}
function wp_schedule_event($timestamp, $recurrence, $hook, $args = array(), $wp_error = false)
{
    if (!is_numeric($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']);
    $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;
    }
    $event = apply_filters('schedule_event', $event);
    if (!$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, $wp_error);
}
function wp_reschedule_event($timestamp, $recurrence, $hook, $args = array(), $wp_error = false)
{
    if (!is_numeric($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();
    $interval = 0;
    if (isset($schedules[$recurrence])) {
        $interval = $schedules[$recurrence]['interval'];
    }
    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);
    $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;
    }
    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, $wp_error);
}
function wp_unschedule_event($timestamp, $hook, $args = array(), $wp_error = false)
{
    if (!is_numeric($timestamp) || $timestamp <= 0) {
        if ($wp_error) {
            return new WP_Error('invalid_timestamp', __('Event timestamp must be a valid Unix timestamp.'));
        }
        return false;
    }
    $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, $wp_error);
}
function wp_clear_scheduled_hook($hook, $args = array(), $wp_error = false)
{
    if (!is_array($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);
        $wp_error = false;
    }
    $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;
    }
    $crons = _get_cron_array();
    if (empty($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);
}
function wp_unschedule_hook($hook, $wp_error = false)
{
    $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[$timestamp]);
        }
    }
    if (empty($results)) {
        return 0;
    }
    $set = _set_cron_array($crons, $wp_error);
    if (true === $set) {
        return array_sum($results);
    }
    return $set;
}
function wp_get_scheduled_event($hook, $args = array(), $timestamp = null)
{
    $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) {
        $next = false;
        foreach ($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 $event;
}
function wp_next_scheduled($hook, $args = array())
{
    $next_event = wp_get_scheduled_event($hook, $args);
    if (!$next_event) {
        return false;
    }
    return apply_filters('wp_next_scheduled', $next_event->timestamp, $next_event, $hook, $args);
}
function spawn_cron($gmt_time = 0)
{
    if (!$gmt_time) {
        $gmt_time = microtime(true);
    }
    if (defined('DOING_CRON') || isset($_GET['doing_wp_cron'])) {
        return false;
    }
    $lock = (float) get_transient('doing_cron');
    if ($lock > $gmt_time + 10 * MINUTE_IN_SECONDS) {
        $lock = 0;
    }
    if ($lock + WP_CRON_LOCK_TIMEOUT > $gmt_time) {
        return false;
    }
    $crons = wp_get_ready_cron_jobs();
    if (empty($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 ' ';
        wp_ob_end_flush_all();
        flush();
        require_once ABSPATH . 'wp-cron.php';
        return true;
    }
    $doing_wp_cron = sprintf('%.22F', $gmt_time);
    set_transient('doing_cron', $doing_wp_cron);
    $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, '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);
}
function wp_cron()
{
    if (did_action('wp_loaded')) {
        return _wp_cron();
    }
    add_action('wp_loaded', '_wp_cron', 20);
}
function _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;
    }
    $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);
}
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')));
    return array_merge(apply_filters('cron_schedules', array()), $schedules);
}
function wp_get_schedule($hook, $args = array())
{
    $schedule = false;
    $event = wp_get_scheduled_event($hook, $args);
    if ($event) {
        $schedule = $event->schedule;
    }
    return apply_filters('get_schedule', $schedule, $hook, $args);
}
function wp_get_ready_cron_jobs()
{
    $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;
}
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 $cron;
}
function _set_cron_array($cron, $wp_error = false)
{
    if (!is_array($cron)) {
        $cron = array();
    }
    $cron['version'] = 2;
    $result = update_option('cron', $cron, true);
    if ($wp_error && !$result) {
        return new WP_Error('could_not_set', __('The cron event list could not be saved.'));
    }
    return $result;
}
function _upgrade_cron_array($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, true);
    return $new_cron;
}