/**
* Generates a random number
*
* Not verbatim WordPress, keeps seed value in backpress options.
*
* @since WP 2.6.2
*
* @param int $min Lower limit for the generated number (optional, default is 0)
* @param int $max Upper limit for the generated number (optional, default is 4294967295)
* @return int A random number between min and max
*/
function rand($min = 0, $max = 0)
{
global $rnd_value;
$seed = backpress_get_transient('random_seed');
// Reset $rnd_value after 14 uses
// 32(md5) + 40(sha1) + 40(sha1) / 8 = 14 random numbers from $rnd_value
if (strlen($rnd_value) < 8) {
$rnd_value = md5(uniqid(microtime() . mt_rand(), true) . $seed);
$rnd_value .= sha1($rnd_value);
$rnd_value .= sha1($rnd_value . $seed);
$seed = md5($seed . $rnd_value);
backpress_set_transient('random_seed', $seed);
}
// Take the first 8 digits for our value
$value = substr($rnd_value, 0, 8);
// Strip the first eight, leaving the remainder for the next call to wp_rand().
$rnd_value = substr($rnd_value, 8);
$value = abs(hexdec($value));
// Reduce the value to be within the min - max range
// 4294967295 = 0xffffffff = max random number
if ($max != 0) {
$value = $min + ($max - $min + 1) * ($value / (4294967295 + 1));
}
return abs(intval($value));
}
/**
* Send request to run cron through HTTP request that doesn't halt page loading.
*
* @since 2.1.0
*
* @return null Cron could not be spawned, because it is not needed to run.
*/
function spawn_cron($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
*/
$flag = backpress_get_transient('doing_cron');
if ($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;
}
backpress_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;
}
backpress_set_transient('doing_cron', $local_time);
$cron_url = remove_query_arg('check', backpress_get_option('cron_uri'));
$cron_url = add_query_arg('doing_wp_cron', '', $cron_url);
wp_remote_post($cron_url, array('timeout' => 0.01, 'blocking' => false, 'sslverify' => apply_filters('https_local_ssl_verify', true)));
}
