/**
* Returns true if we can minify
*
* @param string $buffer
* @return string
*/
function can_minify2($buffer)
{
/**
* Check for database error
*/
if (Util_Content::is_database_error($buffer)) {
$this->minify_reject_reason = 'Database Error occurred';
return false;
}
/**
* Check for DONOTMINIFY constant
*/
if (defined('DONOTMINIFY') && DONOTMINIFY) {
$this->minify_reject_reason = 'DONOTMINIFY constant is defined';
return false;
}
/**
* Check feed minify
*/
if ($this->_config->get_boolean('minify.html.reject.feed') && function_exists('is_feed') && is_feed()) {
$this->minify_reject_reason = 'Feed is rejected';
return false;
}
return true;
}
/**
* 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;
}
/**
* Returns true if we can do CDN logic
*
* @param unknown $buffer
* @return string
*/
function can_cdn2($buffer)
{
/**
* Check for database error
*/
if (Util_Content::is_database_error($buffer)) {
$this->cdn_reject_reason = 'Database Error occurred';
return false;
}
/**
* Check for DONOTCDN constant
*/
if (defined('DONOTCDN') && DONOTCDN) {
$this->cdn_reject_reason = 'DONOTCDN constant is defined';
return false;
}
/**
* Check logged users roles
*/
if ($this->_config->get_boolean('cdn.reject.logged_roles') && !$this->_check_logged_in_role_allowed()) {
$this->cdn_reject_reason = 'logged in role is rejected';
return false;
}
return true;
}
/**
* Checks if can we do cache logic
*
* @param string $buffer
* @return boolean
*/
function _can_cache2($buffer)
{
/**
* Skip if caching is disabled
*/
if (!$this->_caching) {
return false;
}
/**
* Check for database error
*/
if (Util_Content::is_database_error($buffer)) {
$this->cache_reject_reason = 'Database error occurred';
return false;
}
/**
* Check for DONOTCACHEPAGE constant
*/
if (defined('DONOTCACHEPAGE') && DONOTCACHEPAGE) {
$this->cache_reject_reason = 'DONOTCACHEPAGE constant is defined';
return false;
}
/**
* Don't cache 404 pages
*/
if (!$this->_config->get_boolean('pgcache.cache.404') && function_exists('is_404') && is_404()) {
$this->cache_reject_reason = 'Page is 404';
return false;
}
/**
* Don't cache homepage
*/
if (!$this->_config->get_boolean('pgcache.cache.home') && function_exists('is_home') && is_home()) {
$this->cache_reject_reason = is_front_page() && is_home() ? 'Page is front page' : 'Page is posts page';
return false;
}
/**
* Don't cache front page
*/
if ($this->_config->get_boolean('pgcache.reject.front_page') && function_exists('is_front_page') && is_front_page() && !is_home()) {
$this->cache_reject_reason = 'Page is front page';
return false;
}
/**
* Don't cache feed
*/
if (!$this->_config->get_boolean('pgcache.cache.feed') && function_exists('is_feed') && is_feed()) {
$this->cache_reject_reason = 'Page is feed';
return false;
}
/**
* Check if page contains dynamic tags
*/
if ($this->_enhanced_mode && $this->_has_dynamic($buffer)) {
$this->cache_reject_reason = 'Page contains dynamic tags (mfunc or mclude) can not be cached in enhanced mode';
return false;
}
return true;
}