ally 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 = 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(); include_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 bool|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 ( strpos( $_SERVER['REQUEST_URI'], '/wp-cron.php' ) !== false || ( 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 preflight or hijack 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; }