PHP Couchbase persistent connections shares more than expected

PHP Couchbase persistent connection shares all option settings (serializer, compression, prefix_key) and keeps that settings across multiple requests. This is not an expected behaviour.

Code:

<?php
$cb1 = new Couchbase("http://192.168.0.180/default");
$cb2 = new Couchbase("http://192.168.0.180/default");

$cb1->setOption(COUCHBASE_OPT_PREFIX_KEY,'cb1');
$cb2->setOption(COUCHBASE_OPT_PREFIX_KEY,'cb2');

$cb1->set('val1','v1', 60);
$cb2->set('val2','v2', 60);
?>

will store following keys:

cb2_val1
cb2_val2

Moreover if you execute right after previous request following code (in another script):

<?php
$cb = new Couchbase("http://192.168.0.180/default");
$cb->set('val3','v3', 60);
?>

the code stores key:

cb2_val3

If you turn off the persistent connections, you will get more consistent results:

cb1_val1
cb2_val2
val3

The problem is that whole _php_couchbase_res structure is shared when using persistent connection. Possible change is to duplicate this structure in php_couchbase_create_impl. But resource destructors should be modified according to this change.