Wordpress 2.9

[autoinstalls/wordpress.git] / wp-includes / cron.php

diff --git a/wp-includes/cron.php b/wp-includes/cron.php
index 08fbb0ea8fa9ebd8dabb255a823c348b49a470cd..416803a9bc04cf15ce01ea2cd9ead74732af5be1 100644 (file)
--- a/wp-includes/cron.php
+++ b/wp-includes/cron.php
@@ -1,6 +1,30 @@
 <?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 string $hook Action hook to execute when cron is run.
+ * @param array $args Optional. Arguments to pass to the hook's callback function.
+ */

 function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
 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 );
        $crons = _get_cron_array();
        $key = md5(serialize($args));
        $crons[$timestamp][$hook][$key] = array( 'schedule' => false, 'args' => $args );


@@ -8,6 +32,24 @@ function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
        _set_cron_array( $crons );
 }
 
        _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.
+ *
+ * Valid values for the recurrence are hourly, daily and twicedaily.  These can
+ * be extended using the cron_schedules filter in wp_get_schedules().
+ *
+ * @since 2.1.0
+ *
+ * @param int $timestamp Timestamp for when to run the event.
+ * @param string $recurrence How often the event should recur.
+ * @param string $hook Action hook to execute when cron is run.
+ * @param array $args Optional. Arguments to pass to the hook's callback 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();
 function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {
        $crons = _get_cron_array();
        $schedules = wp_get_schedules();


@@ -19,6 +61,17 @@ function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {
        _set_cron_array( $crons );
 }
 
        _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 string $hook Action hook to execute when cron is run.
+ * @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()) {
        $crons = _get_cron_array();
        $schedules = wp_get_schedules();
 function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array()) {
        $crons = _get_cron_array();
        $schedules = wp_get_schedules();


@@ -35,12 +88,31 @@ function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array()) {
        if ( 0 == $interval )
                return false;
 
        if ( 0 == $interval )
                return false;
 

-       while ( $timestamp < time() + 1 )
-               $timestamp += $interval;
+       $now = time();
+
+    if ( $timestamp >= $now )
+        $timestamp = $now + $interval;
+    else
+        $timestamp = $now + ($interval - (($now - $timestamp) % $interval));

 
        wp_schedule_event( $timestamp, $recurrence, $hook, $args );
 }
 
 
        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 string $hook Action hook, the execution of which will be unscheduled.
+ * @param array $args Arguments to pass to the hook's callback function.
+ * Although not passed to a callback function, these arguments are used
+ * to uniquely identify the scheduled event, so they should be the same
+ * as those used when originally scheduling the event.
+ */

 function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
        $crons = _get_cron_array();
        $key = md5(serialize($args));
 function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
        $crons = _get_cron_array();
        $key = md5(serialize($args));


@@ -52,6 +124,14 @@ function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
        _set_cron_array( $crons );
 }
 
        _set_cron_array( $crons );
 }
 

+/**
+ * Unschedule all cron jobs attached to a specific hook.
+ *
+ * @since 2.1.0
+ *
+ * @param string $hook Action hook, the execution of which will be unscheduled.
+ * @param mixed $args,... Optional. Event arguments.
+ */

 function wp_clear_scheduled_hook( $hook ) {
        $args = array_slice( func_get_args(), 1 );
 
 function wp_clear_scheduled_hook( $hook ) {
        $args = array_slice( func_get_args(), 1 );
 


@@ -59,6 +139,15 @@ function wp_clear_scheduled_hook( $hook ) {
                wp_unschedule_event( $timestamp, $hook, $args );
 }
 
                wp_unschedule_event( $timestamp, $hook, $args );
 }
 

+/**
+ * Retrieve the next timestamp for a cron event.
+ *
+ * @since 2.1.0
+ *
+ * @param string $hook Action hook to execute when cron is run.
+ * @param array $args Optional. Arguments to pass to the hook's callback 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));
 function wp_next_scheduled( $hook, $args = array() ) {
        $crons = _get_cron_array();
        $key = md5(serialize($args));


@@ -71,73 +160,156 @@ function wp_next_scheduled( $hook, $args = array() ) {
        return false;
 }
 
        return false;
 }
 

-function spawn_cron() {
-       $crons = _get_cron_array();
+/**
+ * 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( $local_time = 0 ) {
+
+       if ( !$local_time )
+               $local_time = time();
+
+       if ( defined('DOING_CRON') || isset($_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 )
+               return;
+
+       /*
+       * 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_transient('doing_cron');
+
+       if ( $flag > $local_time + 10*60 )
+               $flag = 0;
+
+       // don't run if another process is currently running it or more than once every 60 sec.
+       if ( $flag + 60 > $local_time )
+               return;

 
 

+       //sanity check
+       $crons = _get_cron_array();

        if ( !is_array($crons) )
                return;
 
        $keys = array_keys( $crons );
        if ( !is_array($crons) )
                return;
 
        $keys = array_keys( $crons );

-       if ( array_shift( $keys ) > time() )
+       if ( isset($keys[0]) && $keys[0] > $local_time )

                return;
 
                return;
 

-       $cron_url = get_option( 'siteurl' ) . '/wp-cron.php';
-       $parts = parse_url( $cron_url );
+       if ( defined('ALTERNATE_WP_CRON') && ALTERNATE_WP_CRON ) {
+               if ( !empty($_POST) || defined('DOING_AJAX') )
+                       return;

 
 

-       if ($parts['scheme'] == 'https') {
-               // support for SSL was added in 4.3.0
-               if (version_compare(phpversion(), '4.3.0', '>=') && function_exists('openssl_open')) {
-                       $port = isset($parts['port']) ? $parts['port'] : 443;
-                       $argyle = @fsockopen('ssl://' . $parts['host'], $port, $errno, $errstr, 0.01);
-               } else {
-                       return false;
-               }
-       } else {
-               $port = isset($parts['port']) ? $parts['port'] : 80;
-               $argyle = @ fsockopen( $parts['host'], $port, $errno, $errstr, 0.01 );
+               set_transient( 'doing_cron', $local_time );
+
+               ob_start();
+               wp_redirect( add_query_arg('doing_wp_cron', '', stripslashes($_SERVER['REQUEST_URI'])) );
+               echo ' ';
+
+               // flush any buffers and send the headers
+               while ( @ob_end_flush() );
+               flush();
+
+               @include_once(ABSPATH . 'wp-cron.php');
+               return;

        }
 
        }
 

-       if ( $argyle )
-               fputs( $argyle,
-                         "GET {$parts['path']}?check=" . wp_hash('187425') . " HTTP/1.0\r\n"
-                       . "Host: {$_SERVER['HTTP_HOST']}\r\n\r\n"
-               );
+       set_transient( 'doing_cron', $local_time );
+
+       $cron_url = get_option( 'siteurl' ) . '/wp-cron.php?doing_wp_cron';
+       wp_remote_post( $cron_url, array('timeout' => 0.01, 'blocking' => false, 'sslverify' => apply_filters('https_local_ssl_verify', true)) );

 }
 
 }
 

+/**
+ * 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() {
 function wp_cron() {

+

        // Prevent infinite loops caused by lack of wp-cron.php
        // 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;
 
                return;
 

-       $crons = _get_cron_array();
-
-       if ( !is_array($crons) )
+       if ( false === $crons = _get_cron_array() )

                return;
 
                return;
 

+       $local_time = time();

        $keys = array_keys( $crons );
        $keys = array_keys( $crons );

-       if ( isset($keys[0]) && $keys[0] > time() )
+       if ( isset($keys[0]) && $keys[0] > $local_time )

                return;
 
        $schedules = wp_get_schedules();
        foreach ( $crons as $timestamp => $cronhooks ) {
                return;
 
        $schedules = wp_get_schedules();
        foreach ( $crons as $timestamp => $cronhooks ) {

-               if ( $timestamp > time() ) break;
-               foreach ( $cronhooks as $hook => $args ) {
+               if ( $timestamp > $local_time ) break;
+               foreach ( (array) $cronhooks as $hook => $args ) {

                        if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
                                continue;
                        if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
                                continue;

-                       spawn_cron();
+                       spawn_cron( $local_time );

                        break 2;
                }
        }
 }
 
                        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') ),
 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 );
 }
 
                '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 string $hook Action hook to execute when cron is run.
+ * @param array $args Optional. Arguments to pass to the hook's callback 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));
 function wp_get_schedule($hook, $args = array()) {
        $crons = _get_cron_array();
        $key = md5(serialize($args));


@@ -154,6 +326,14 @@ function wp_get_schedule($hook, $args = array()) {
 // Private functions
 //
 
 // 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) )
 function _get_cron_array()  {
        $cron = get_option('cron');
        if ( ! is_array($cron) )


@@ -167,19 +347,38 @@ function _get_cron_array()  {
        return $cron;
 }
 
        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 );
 }
 
 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();
 
 function _upgrade_cron_array($cron) {
        if ( isset($cron['version']) && 2 == $cron['version'])
                return $cron;
 
        $new_cron = array();
 

-       foreach ($cron as $timestamp => $hooks) {
-               foreach ( $hooks as $hook => $args ) {
+       foreach ( (array) $cron as $timestamp => $hooks) {
+               foreach ( (array) $hooks as $hook => $args ) {

                        $key = md5(serialize($args['args']));
                        $new_cron[$timestamp][$hook][$key] = $args;
                }
                        $key = md5(serialize($args['args']));
                        $new_cron[$timestamp][$hook][$key] = $args;
                }


@@ -190,4 +389,7 @@ function _upgrade_cron_array($cron) {
        return $new_cron;
 }
 
        return $new_cron;
 }
 

-?>
+// stub for checking server timer accuracy, using outside standard time sources
+function check_server_timer( $local_time ) {
+       return true;
+}