function ob($output)
{
// PHP5 and objects disappearing before output buffers?
wp_cache_init();
// Remember, $wp_object_cache was clobbered in wp-settings.php so we have to repeat this.
$this->configure_groups();
if ($this->cancel !== false) {
wp_cache_delete("{$this->url_key}_genlock", $this->group);
return $output;
}
// Do not batcache blank pages unless they are HTTP redirects
$output = trim($output);
if ($output === '' && (!$this->redirect_status || !$this->redirect_location)) {
wp_cache_delete("{$this->url_key}_genlock", $this->group);
return;
}
// Do not cache 5xx responses
if (isset($this->status_code) && intval($this->status_code / 100) == 5) {
wp_cache_delete("{$this->url_key}_genlock", $this->group);
return $output;
}
$this->do_variants($this->vary);
$this->generate_keys();
// Construct and save the batcache
$this->cache = array('output' => $output, 'time' => isset($_SERVER['REQUEST_TIME']) ? $_SERVER['REQUEST_TIME'] : time(), 'timer' => $this->timer_stop(false, 3), 'headers' => array(), 'status_header' => $this->status_header, 'redirect_status' => $this->redirect_status, 'redirect_location' => $this->redirect_location, 'version' => $this->url_version);
foreach (headers_list() as $header) {
list($k, $v) = array_map('trim', explode(':', $header, 2));
$this->cache['headers'][$k][] = $v;
}
if (!empty($this->cache['headers']) && !empty($this->uncached_headers)) {
foreach ($this->uncached_headers as $header) {
unset($this->cache['headers'][$header]);
}
}
foreach ($this->cache['headers'] as $header => $values) {
// Do not cache if cookies were set
if (strtolower($header) === 'set-cookie') {
wp_cache_delete("{$this->url_key}_genlock", $this->group);
return $output;
}
foreach ((array) $values as $value) {
if (preg_match('/^Cache-Control:.*max-?age=(\\d+)/i', "{$header}: {$value}", $matches)) {
$this->max_age = intval($matches[1]);
}
}
}
$this->cache['max_age'] = $this->max_age;
wp_cache_set($this->key, $this->cache, $this->group, $this->max_age + $this->seconds + 30);
// Unlock regeneration
wp_cache_delete("{$this->url_key}_genlock", $this->group);
if ($this->cache_control) {
// Don't clobber Last-Modified header if already set, e.g. by WP::send_headers()
if (!isset($this->cache['headers']['Last-Modified'])) {
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $this->cache['time']) . ' GMT', true);
}
if (!isset($this->cache['headers']['Cache-Control'])) {
header("Cache-Control: max-age={$this->max_age}, must-revalidate", false);
}
}
$this->do_headers($this->headers);
// Add some debug info just before <head
if ($this->debug) {
$this->add_debug_just_cached();
}
// Pass output to next ob handler
batcache_stats('batcache', 'total_page_views');
return $this->cache['output'];
}
