/** * Output buffering callback * * @param string $buffer * @return string */ function ob_callback($buffer) { global $wpdb; if ($buffer != '' && w3_is_xml($buffer)) { $date = date('Y-m-d H:i:s'); $host = !empty($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : 'localhost'; if ($this->is_supported()) { $buffer .= sprintf("\r\n<!-- Served from: %s @ %s by W3 Total Cache -->", $host, $date); } else { $buffer .= "\r\n<!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/\r\n\r\n"; if ($this->_config->get_boolean('minify.enabled')) { require_once W3TC_LIB_W3_DIR . '/Plugin/Minify.php'; $w3_plugin_minify =& W3_Plugin_Minify::instance(); $buffer .= sprintf("Minified using %s%s\r\n", w3_get_engine_name($this->_config->get_string('minify.engine')), $w3_plugin_minify->minify_reject_reason != '' ? sprintf(' (%s)', $w3_plugin_minify->minify_reject_reason) : ''); } if ($this->_config->get_boolean('pgcache.enabled')) { require_once W3TC_LIB_W3_DIR . '/PgCache.php'; $w3_pgcache =& W3_PgCache::instance(); $buffer .= sprintf("Page Caching using %s%s\r\n", w3_get_engine_name($this->_config->get_string('pgcache.engine')), $w3_pgcache->cache_reject_reason != '' ? sprintf(' (%s)', $w3_pgcache->cache_reject_reason) : ''); } if ($this->_config->get_boolean('dbcache.enabled') && is_a($wpdb, 'W3_Db')) { $append = is_user_logged_in() ? ' (user is logged in)' : ''; if ($wpdb->query_hits) { $buffer .= sprintf("Database Caching %d/%d queries in %.3f seconds using %s%s\r\n", $wpdb->query_hits, $wpdb->query_total, $wpdb->time_total, w3_get_engine_name($this->_config->get_string('dbcache.engine')), $append); } else { $buffer .= sprintf("Database Caching using %s%s\r\n", w3_get_engine_name($this->_config->get_string('dbcache.engine')), $append); } } if ($this->_config->get_boolean('cdn.enabled')) { require_once W3TC_LIB_W3_DIR . '/Plugin/Cdn.php'; $w3_plugin_cdn =& W3_Plugin_Cdn::instance(); $cdn =& $w3_plugin_cdn->get_cdn(); $via = $cdn->get_via(); $buffer .= sprintf("Content Delivery Network via %s%s\r\n", $via ? $via : 'N/A', $w3_plugin_cdn->cdn_reject_reason != '' ? sprintf(' (%s)', $w3_plugin_cdn->cdn_reject_reason) : ''); } $buffer .= sprintf("\r\nServed from: %s @ %s -->", $host, $date); } } return $buffer; }
/** * Output buffering callback * * @param string $buffer * @return string */ function ob_callback(&$buffer) { global $wpdb; if ($buffer != '' && w3_is_xml($buffer)) { if (w3_is_database_error($buffer)) { @header('HTTP/1.1 503 Service Unavailable'); } else { /** * Replace links for preview mode */ if (w3_is_preview_mode() && isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] != W3TC_POWERED_BY) { $domain_url_regexp = w3_get_domain_url_regexp(); $buffer = preg_replace_callback('~(href|src|action)=([\'"])(' . $domain_url_regexp . ')?(/[^\'"]*)~', array(&$this, 'link_replace_callback'), $buffer); } /** * Add footer comment */ $date = date_i18n('Y-m-d H:i:s'); $host = !empty($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : 'localhost'; if ($this->is_supported()) { $buffer .= sprintf("\r\n<!-- Served from: %s @ %s by W3 Total Cache -->", w3_escape_comment($host), $date); } else { $strings = array(); if ($this->_config->get_boolean('minify.enabled') && !$this->_config->get_boolean('minify.debug')) { require_once W3TC_LIB_W3_DIR . '/Plugin/Minify.php'; $w3_plugin_minify =& W3_Plugin_Minify::instance(); $strings[] = sprintf("Minified using %s%s", w3_get_engine_name($this->_config->get_string('minify.engine')), $w3_plugin_minify->minify_reject_reason != '' ? sprintf(' (%s)', $w3_plugin_minify->minify_reject_reason) : ''); } if ($this->_config->get_boolean('pgcache.enabled') && !$this->_config->get_boolean('pgcache.debug')) { require_once W3TC_LIB_W3_DIR . '/PgCache.php'; $w3_pgcache =& W3_PgCache::instance(); $strings[] = sprintf("Page Caching using %s%s", w3_get_engine_name($this->_config->get_string('pgcache.engine')), $w3_pgcache->cache_reject_reason != '' ? sprintf(' (%s)', $w3_pgcache->cache_reject_reason) : ''); } if ($this->_config->get_boolean('dbcache.enabled') && !$this->_config->get_boolean('dbcache.debug') && is_a($wpdb, 'W3_Db')) { $append = is_user_logged_in() ? ' (user is logged in)' : ''; if ($wpdb->query_hits) { $strings[] = sprintf("Database Caching %d/%d queries in %.3f seconds using %s%s", $wpdb->query_hits, $wpdb->query_total, $wpdb->time_total, w3_get_engine_name($this->_config->get_string('dbcache.engine')), $append); } else { $strings[] = sprintf("Database Caching using %s%s", w3_get_engine_name($this->_config->get_string('dbcache.engine')), $append); } } if ($this->_config->get_boolean('objectcache.enabled') && !$this->_config->get_boolean('objectcache.debug')) { require_once W3TC_LIB_W3_DIR . '/ObjectCache.php'; $w3_objectcache =& W3_ObjectCache::instance(); $strings[] = sprintf("Object Caching %d/%d objects using %s", $w3_objectcache->cache_hits, $w3_objectcache->cache_total, w3_get_engine_name($this->_config->get_string('objectcache.engine'))); } if ($this->_config->get_boolean('cdn.enabled') && !$this->_config->get_boolean('cdn.debug')) { require_once W3TC_LIB_W3_DIR . '/Plugin/Cdn.php'; $w3_plugin_cdn =& W3_Plugin_Cdn::instance(); $cdn =& $w3_plugin_cdn->get_cdn(); $via = $cdn->get_via(); $strings[] = sprintf("Content Delivery Network via %s%s", $via ? $via : 'N/A', $w3_plugin_cdn->cdn_reject_reason != '' ? sprintf(' (%s)', $w3_plugin_cdn->cdn_reject_reason) : ''); } $buffer .= "\r\n<!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/\r\n"; if (count($strings)) { $buffer .= "\r\n" . implode("\r\n", $strings) . "\r\n"; } $buffer .= sprintf("\r\nServed from: %s @ %s -->", w3_escape_comment($host), $date); } } } return $buffer; }
function rewrite_url_to_cdn_url($url) { // check if W3 Total Cache is installed if (class_exists('W3_Plugin_Cdn')) { $w3tc_instance = new W3_Plugin_Cdn(); $path = str_replace(site_url() . '/', '', $url); $cdn = $w3tc_instance->_get_common()->get_cdn(); $remote_path = $w3tc_instance->_get_common()->uri_to_cdn_uri($path); $new_url = $cdn->format_url($remote_path); } else { $new_url = $url; } return $new_url; }