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production * -1: production->preview * @param boolean $remove_source remove source file */ static public function preview_production_copy( $blog_id, $direction ) { if ( defined( 'W3TC_CONFIG_DATABASE' ) && W3TC_CONFIG_DATABASE ) { ConfigDbStorage::preview_production_copy( $blog_id, $direction ); } else { $preview_filename = Config::util_config_filename( $blog_id, true ); $production_filename = Config::util_config_filename( $blog_id, false ); if ( $direction > 0 ) { $src = $preview_filename; $dest = $production_filename; } else { $src = $production_filename; $dest = $preview_filename; } if ( !@copy( $src, $dest ) ) { Util_Activation::throw_on_write_error( $dest ); } } if ( defined( 'W3TC_CONFIG_CACHE_ENGINE' ) ) { ConfigCache::remove_item( $blog_id, $preview ); } } static public function save_item( $blog_id, $preview, $data ) { if ( defined( 'W3TC_CONFIG_DATABASE' ) && W3TC_CONFIG_DATABASE ) { ConfigDbStorage::save_item( $blog_id, $preview, $data ); } else { $filename = Config::util_config_filename( $blog_id, $preview ); if ( defined( 'JSON_PRETTY_PRINT' ) ) $config = json_encode( $data, JSON_PRETTY_PRINT ); else // for older php versions $config = json_encode( $data ); Util_File::file_put_contents_atomic( $filename, '' . $config ); } if ( defined( 'W3TC_CONFIG_CACHE_ENGINE' ) ) { ConfigCache::remove_item( $blog_id, $preview ); } } }