function w3tc_footer_comment($strings)
{
$strings[] = sprintf(__('Minified using %s%s', 'w3-total-cache'), Cache::engine_name($this->_config->get_string('minify.engine')), $this->minify_reject_reason != '' ? sprintf(' (%s)', $this->minify_reject_reason) : '');
if ($this->_config->get_boolean('minify.debug')) {
$strings[] = "Minify debug info:";
$strings[] = sprintf("%s%s", str_pad('Engine: ', 20), Cache::engine_name($this->_config->get_string('minify.engine')));
$strings[] = sprintf("%s%s", str_pad('Theme: ', 20), $this->get_theme());
$strings[] = sprintf("%s%s", str_pad('Template: ', 20), $this->get_template());
if ($this->minify_reject_reason) {
$strings[] = sprintf("%s%s", str_pad('Reject reason: ', 20), $this->minify_reject_reason);
}
if ($this->error) {
$strings[] = sprintf("%s%s", str_pad('Errors: ', 20), $this->error);
}
if (count($this->replaced_styles)) {
$strings[] = "Replaced CSS files:";
foreach ($this->replaced_styles as $index => $file) {
$strings[] = sprintf("%d. %s", $index + 1, Util_Content::escape_comment($file));
}
}
if (count($this->replaced_scripts)) {
$strings[] = "Replaced JavaScript files:";
foreach ($this->replaced_scripts as $index => $file) {
$strings[] = sprintf("%d. %s\r\n", $index + 1, Util_Content::escape_comment($file));
}
}
}
return $strings;
}
/**
* Output buffering callback
*
* @param string $buffer
* @return string
*/
function ob_callback($buffer)
{
global $wpdb;
global $w3_late_caching_succeeded;
if ($w3_late_caching_succeeded) {
return $buffer;
}
if (Util_Content::is_database_error($buffer)) {
status_header(503);
} else {
if (Util_Content::can_print_comment($buffer)) {
/**
* Add footer comment
*/
$date = date_i18n('Y-m-d H:i:s');
$host = !empty($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : 'localhost';
if (Util_Environment::is_preview_mode()) {
$buffer .= "\r\n<!-- W3 Total Cache used in preview mode -->";
}
if ($this->_config->get_string('common.support') != '' || $this->_config->get_boolean('common.tweeted')) {
$buffer .= sprintf("\r\n<!-- Served from: %s @ %s by W3 Total Cache -->", Util_Content::escape_comment($host), $date);
} else {
$strings = array();
$strings = apply_filters('w3tc_footer_comment', $strings);
$buffer .= "\r\n<!-- Performance optimized by W3 Total Cache. Learn more: https://www.w3-edge.com/products/\r\n";
if (count($strings)) {
$buffer .= "\r\n" . Util_Content::escape_comment(implode("\r\n", $strings)) . "\r\n";
}
$buffer .= sprintf("\r\n Served from: %s @ %s by W3 Total Cache -->", Util_Content::escape_comment($host), $date);
}
}
$buffer = Util_Bus::do_ob_callbacks(array('minify', 'newrelic', 'cdn', 'browsercache', 'pagecache'), $buffer);
}
return $buffer;
}
function get_replaced_urls()
{
$strings = array();
if (count($this->_replaced_urls)) {
$strings[] = "Replaced URLs:";
foreach ($this->_replaced_urls as $old_url => $new_url) {
$strings[] = sprintf("%s => %s", Util_Content::escape_comment($old_url), Util_Content::escape_comment($new_url));
}
}
return $strings;
}
/**
* 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;
}
