/**
* 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)
{
/*
* 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));
}
/**
* 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 (isset($keys[0]) && $keys[0] > $local_time) {
return;
}
if (defined('ALTERNATE_WP_CRON') && ALTERNATE_WP_CRON) {
if (!empty($_POST) || defined('DOING_AJAX')) {
return;
}
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();
WP_DEBUG ? include_once ABSPATH . 'wp-cron.php' : @(include_once ABSPATH . 'wp-cron.php');
return;
}
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)));
}
