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<?php
function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
$crons = _get_cron_array();
$key = md5(serialize($args));
$crons[$timestamp][$hook][$key] = array( 'schedule' => false, 'args' => $args );
uksort( $crons, "strnatcasecmp" );
_set_cron_array( $crons );
}
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 );
}
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 );
}
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 );
}
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 );
}
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;
}
function spawn_cron() {
$crons = _get_cron_array();
if ( !is_array($crons) )
return;
$keys = array_keys( $crons );
if ( array_shift( $keys ) > time() )
return;
$cron_url = get_option( 'siteurl' ) . '/wp-cron.php';
$parts = parse_url( $cron_url );
if ($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 );
}
if ( $argyle )
fputs( $argyle,
"GET {$parts['path']}?check=" . wp_hash('187425') . " HTTP/1.0\r\n"
. "Host: {$_SERVER['HTTP_HOST']}\r\n\r\n"
);
}
function wp_cron() {
// Prevent infinite loops caused by lack of wp-cron.php
if ( strpos($_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;
$schedules = wp_get_schedules();
foreach ( $crons as $timestamp => $cronhooks ) {
if ( $timestamp > time() ) break;
foreach ( $cronhooks as $hook => $args ) {
if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
continue;
spawn_cron();
break 2;
}
}
}
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() ), $schedules );
}
function wp_get_schedule($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
//
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 $cron;
}
function _set_cron_array($cron) {
$cron['version'] = 2;
update_option( 'cron', $cron );
}
function _upgrade_cron_array($cron) {
if ( isset($cron['version']) && 2 == $cron['version'])
return $cron;
$new_cron = array();
foreach ($cron as $timestamp => $hooks) {
foreach ( $hooks as $hook => $args ) {
$key = md5(serialize($args['args']));
$new_cron[$timestamp][$hook][$key] = $args;
}
}
$new_cron['version'] = 2;
update_option( 'cron', $new_cron );
return $new_cron;
}
?>
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