With PHP 5.4.41 and memcached 1.4.24 it works in ASCII mode as well.
(PECL memcached >= 2.0.0)
Memcached::touch — Define una nueva expiración en un elemento
Memcached::touch() define un nuevo valor de expiración para una clave dada.
key
The key under which to store the value.
expiration
The expiration time, defaults to 0. See Expiration Times for more info.
Esta función retorna true
en caso de éxito o false
si ocurre un error.
Use Memcached::getResultCode() if necessary.
This is only supported when binary protocol is enabled.
$obj = new Memcached();
$obj->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);