Description:
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Line57 of memcache.php is "return values" now, but it should be "return $values"! The absence of "$" make this script can not run.

Reproduce code:
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 51 function get_host_port_from_server($server){
 52     $values = explode(':', $server);
 53     if (($values[0] == 'unix') && (!is_numeric( $values[1]))) {
 54         return array($server, 0);
 55     }
 56     else {
 57         return values;
 58     }
 59 }