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phpdoc for cron.php. Props jacobsantos and hansengel. fixes #5637 

git-svn-id: https://develop.svn.wordpress.org/trunk@8806 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren 2008-09-04 19:12:40 +00:00
parent f21bba6c19
commit 534fbf940d
1 changed files with 148 additions and 1 deletions
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149
wp-includes/cron.php
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@ -1,5 +1,24 @@
<?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()) {
$crons = _get_cron_array();
$key = md5(serialize($args));
@ -8,6 +27,21 @@ function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
_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();
@ -19,6 +53,17 @@ function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {
_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();
@ -41,6 +86,18 @@ function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array()) {
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));
@ -52,6 +109,14 @@ function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
_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 );
@ -59,6 +124,15 @@ function wp_clear_scheduled_hook( $hook ) {
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));
@ -76,7 +150,7 @@ function wp_next_scheduled( $hook, $args = array() ) {
*
* @since 2.1.0
*
* @return null CRON could not be spawned, because it is not needed to run.
* @return null Cron could not be spawned, because it is not needed to run.
*/
function spawn_cron() {
$crons = _get_cron_array();
@ -93,6 +167,13 @@ function spawn_cron() {
wp_remote_post($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 )
@ -119,6 +200,36 @@ function wp_cron() {
}
}
/**
* 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') ),
@ -128,6 +239,15 @@ function wp_get_schedules() {
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));
@ -144,6 +264,14 @@ function wp_get_schedule($hook, $args = array()) {
// 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) )
@ -157,11 +285,30 @@ function _get_cron_array() {
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;