45123cac1f
git-svn-id: https://develop.svn.wordpress.org/trunk@9181 602fd350-edb4-49c9-b593-d223f7449a82
373 lines
10 KiB
PHP
373 lines
10 KiB
PHP
<?php
|
|
/**
|
|
* WordPress CRON API
|
|
*
|
|
* @package WordPress
|
|
*/
|
|
|
|
/**
|
|
* Schedules a hook to run only once.
|
|
*
|
|
* 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.
|
|
*
|
|
* @since 2.1.0
|
|
* @link http://codex.wordpress.org/Function_Reference/wp_schedule_single_event
|
|
*
|
|
* @param int $timestamp Timestamp for when to run the event.
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param array $args Optional. Arguments to pass to the hook function.
|
|
*/
|
|
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 )
|
|
return;
|
|
|
|
$crons = _get_cron_array();
|
|
$key = md5(serialize($args));
|
|
$crons[$timestamp][$hook][$key] = array( 'schedule' => false, 'args' => $args );
|
|
uksort( $crons, "strnatcasecmp" );
|
|
_set_cron_array( $crons );
|
|
}
|
|
|
|
/**
|
|
* Schedule a periodic event.
|
|
*
|
|
* Schedules a hook which will be executed by the WordPress actions core on a
|
|
* specific interval, specified by you. The action will trigger when someone
|
|
* visits your WordPress site, if the scheduled time has passed.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param int $timestamp Timestamp for when to run the event.
|
|
* @param string $recurrence How often the event should recur.
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param array $args Optional. Arguments to pass to the hook function.
|
|
* @return bool|null False on failure, null when complete with scheduling 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'] );
|
|
uksort( $crons, "strnatcasecmp" );
|
|
_set_cron_array( $crons );
|
|
}
|
|
|
|
/**
|
|
* Reschedule a recurring event.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param int $timestamp Timestamp for when to run the event.
|
|
* @param string $recurrence How often the event should recur.
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param array $args Optional. Arguments to pass to the hook function.
|
|
* @return bool|null False on failure. Null when event is rescheduled.
|
|
*/
|
|
function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array()) {
|
|
$crons = _get_cron_array();
|
|
$schedules = wp_get_schedules();
|
|
$key = md5(serialize($args));
|
|
$interval = 0;
|
|
|
|
// First we try to get it from the schedule
|
|
if ( 0 == $interval )
|
|
$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'];
|
|
// Now we assume something is wrong and fail to schedule
|
|
if ( 0 == $interval )
|
|
return false;
|
|
|
|
while ( $timestamp < time() + 1 )
|
|
$timestamp += $interval;
|
|
|
|
wp_schedule_event( $timestamp, $recurrence, $hook, $args );
|
|
}
|
|
|
|
/**
|
|
* Unschedule a previously scheduled cron job.
|
|
*
|
|
* The $timestamp and $hook parameters are required, so that the event can be
|
|
* identified.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param int $timestamp Timestamp for when to run the event.
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param array $args Optional. Arguments to pass to the hook function.
|
|
*/
|
|
function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
|
|
$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] );
|
|
_set_cron_array( $crons );
|
|
}
|
|
|
|
/**
|
|
* Unschedule all cron jobs attached to a specific hook.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param mixed $args,... Optional. Event arguments.
|
|
*/
|
|
function wp_clear_scheduled_hook( $hook ) {
|
|
$args = array_slice( func_get_args(), 1 );
|
|
|
|
while ( $timestamp = wp_next_scheduled( $hook, $args ) )
|
|
wp_unschedule_event( $timestamp, $hook, $args );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the next timestamp for a cron event.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param array $args Optional. Arguments to pass to the hook function.
|
|
* @return bool|int The UNIX timestamp of the next time the scheduled event will occur.
|
|
*/
|
|
function wp_next_scheduled( $hook, $args = array() ) {
|
|
$crons = _get_cron_array();
|
|
$key = md5(serialize($args));
|
|
if ( empty($crons) )
|
|
return false;
|
|
foreach ( $crons as $timestamp => $cron ) {
|
|
if ( isset( $cron[$hook][$key] ) )
|
|
return $timestamp;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Send request to run cron through HTTP request that doesn't halt page loading.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @return null Cron could not be spawned, because it is not needed to run.
|
|
*/
|
|
function spawn_cron( $local_time ) {
|
|
global $current_blog;
|
|
|
|
/*
|
|
* 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 )
|
|
return;
|
|
|
|
//sanity check
|
|
$crons = _get_cron_array();
|
|
if ( !is_array($crons) )
|
|
return;
|
|
|
|
$keys = array_keys( $crons );
|
|
$timestamp = $keys[0];
|
|
if ( $timestamp > $local_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');
|
|
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
//don't run if another process is currently running it
|
|
if ( $flag > $local_time )
|
|
return;
|
|
|
|
update_option( 'doing_cron', $local_time + 30 );
|
|
|
|
wp_remote_post($cron_url, array('timeout' => 0.01, 'blocking' => false));
|
|
}
|
|
|
|
/**
|
|
* Run scheduled callbacks or spawn cron for all scheduled events.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @return null When doesn't need to run Cron.
|
|
*/
|
|
function wp_cron() {
|
|
|
|
// Prevent infinite loops caused by lack of wp-cron.php
|
|
if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false )
|
|
return;
|
|
|
|
$crons = _get_cron_array();
|
|
|
|
if ( !is_array($crons) )
|
|
return;
|
|
|
|
$keys = array_keys( $crons );
|
|
if ( isset($keys[0]) && $keys[0] > time() )
|
|
return;
|
|
|
|
$local_time = time();
|
|
$schedules = wp_get_schedules();
|
|
foreach ( $crons as $timestamp => $cronhooks ) {
|
|
if ( $timestamp > $local_time ) break;
|
|
foreach ( (array) $cronhooks as $hook => $args ) {
|
|
if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
|
|
continue;
|
|
spawn_cron( $local_time );
|
|
break 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieve supported and filtered Cron recurrences.
|
|
*
|
|
* The supported recurrences are 'hourly' and 'daily'. A plugin may add more by
|
|
* hooking into the 'cron_schedules' filter. The filter accepts an array of
|
|
* arrays. The outer array has a key that is the name of the schedule or for
|
|
* example 'weekly'. 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 3600 or 60*60. For weekly, the value would be
|
|
* 60*60*24*7 or 604800. The value of 'interval' would then be 604800.
|
|
*
|
|
* The 'display' is the description. For the 'weekly' key, the 'display' would
|
|
* be <code>__('Once Weekly')</code>.
|
|
*
|
|
* For your plugin, you will be passed an array. you can easily add your
|
|
* schedule by doing the following.
|
|
* <code>
|
|
* // filter parameter variable name is 'array'
|
|
* $array['weekly'] = array(
|
|
* 'interval' => 604800,
|
|
* 'display' => __('Once Weekly')
|
|
* );
|
|
* </code>
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @return array
|
|
*/
|
|
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') ),
|
|
);
|
|
return array_merge( apply_filters( 'cron_schedules', array() ), $schedules );
|
|
}
|
|
|
|
/**
|
|
* Retrieve Cron schedule for hook with arguments.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param callback $hook Function or method to call, when cron is run.
|
|
* @param array $args Optional. Arguments to pass to the hook function.
|
|
* @return string|bool False, if no schedule. Schedule on success.
|
|
*/
|
|
function wp_get_schedule($hook, $args = array()) {
|
|
$crons = _get_cron_array();
|
|
$key = md5(serialize($args));
|
|
if ( empty($crons) )
|
|
return false;
|
|
foreach ( $crons as $timestamp => $cron ) {
|
|
if ( isset( $cron[$hook][$key] ) )
|
|
return $cron[$hook][$key]['schedule'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Private functions
|
|
//
|
|
|
|
/**
|
|
* Retrieve cron info array option.
|
|
*
|
|
* @since 2.1.0
|
|
* @access private
|
|
*
|
|
* @return array CRON info array.
|
|
*/
|
|
function _get_cron_array() {
|
|
$cron = get_option('cron');
|
|
if ( ! is_array($cron) )
|
|
return false;
|
|
|
|
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
|
|
* @access private
|
|
*
|
|
* @param array $cron Cron info array from {@link _get_cron_array()}.
|
|
*/
|
|
function _set_cron_array($cron) {
|
|
$cron['version'] = 2;
|
|
update_option( 'cron', $cron );
|
|
}
|
|
|
|
/**
|
|
* Upgrade a Cron info array.
|
|
*
|
|
* This function upgrades the Cron info array to version 2.
|
|
*
|
|
* @since 2.1.0
|
|
* @access private
|
|
*
|
|
* @param array $cron Cron info array from {@link _get_cron_array()}.
|
|
* @return array An upgraded Cron info array.
|
|
*/
|
|
function _upgrade_cron_array($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;
|
|
}
|
|
|
|
// stub for checking server timer accuracy, using outside standard time sources
|
|
function check_server_timer( $local_time ) {
|
|
return true;
|
|
}
|
|
|
|
?>
|