/**
* Get from the cache
*
* @param string $id
* @param string $group
* @return mixed
*/
function get($id, $group = 'transient', $force = false, &$found = null)
{
if ($this->_debug) {
$time_start = Util_Debug::microtime();
}
$key = $this->_get_cache_key($id);
list($fragment_group, $fragment_group_expiration, $fragment_group_global) = $this->_fragment_group($id, $group);
$internal = isset($this->cache[$fragment_group][$key]);
if ($internal) {
$found = true;
$value = $this->cache[$fragment_group][$key];
} elseif ($this->_caching && !in_array($group, $this->nonpersistent_groups)) {
$cache = $this->_get_cache($fragment_group_global);
$v = $cache->get($key, $fragment_group);
if (is_array($v) && $v['content'] != null) {
$found = true;
$value = $v['content'];
} else {
$value = false;
}
} else {
$value = false;
}
if ($value === null) {
$value = false;
}
if (is_object($value)) {
$value = clone $value;
}
$this->cache[$fragment_group][$key] = $value;
$this->cache_total++;
if ($value !== false) {
$cached = true;
$this->cache_hits++;
} else {
$cached = false;
$this->cache_misses++;
}
/**
* Add debug info
*/
if ($this->_debug) {
$time = Util_Debug::microtime() - $time_start;
$this->time_total += $time;
if (!$group) {
$group = 'transient';
}
$this->debug_info[] = array('id' => $id, 'group' => $group, 'cached' => $cached, 'internal' => $internal, 'data_size' => $value ? strlen(serialize($value)) : '', 'time' => $time);
}
return $value;
}
/**
* Returns debug info
*
* @param boolean $cache
* @param string $reason
* @param boolean $status
* @param double $time
* @return string
*/
public function w3tc_footer_comment($strings)
{
$strings[] = sprintf(__('Page Caching using %s%s', 'w3-total-cache'), Cache::engine_name($this->_config->get_string('pgcache.engine')), $this->cache_reject_reason != '' ? sprintf(' (%s)', $this->cache_reject_reason) : '');
if ($this->_debug) {
$time_total = Util_Debug::microtime() - $this->_time_start;
$engine = $this->_config->get_string('pgcache.engine');
$strings[] = "Page cache debug info:";
$strings[] = sprintf("%s%s", str_pad('Engine: ', 20), Cache::engine_name($engine));
$strings[] = sprintf("%s%s", str_pad('Cache key: ', 20), $this->_page_key);
if ($this->cache_reject_reason != '') {
$strings[] = sprintf("%s%s", str_pad('Reject reason: ', 20), $this->cache_reject_reason);
}
$strings[] = sprintf("%s%.3fs", str_pad('Creation Time: ', 20), time());
$headers = $this->_get_response_headers();
if (count($headers)) {
$strings[] = "Header info:";
foreach ($headers as $header_name => $header_value) {
$strings[] = sprintf("%s%s", str_pad($header_name . ': ', 20), Util_Content::escape_comment($header_value));
}
}
}
return $strings;
}