php-memcached make test errors.

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FAILED TEST SUMMARY
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Memcached::casByKey() [tests/experimental/cas_bykey.phpt]
Memcached::cas() with strange key [tests/experimental/cas_invalid_key.phpt]
Memcached::deleteByKey() [tests/experimental/delete_bykey.phpt]
Memcached getDelayed() and fetch() with and without cas [tests/experimental/fetch.phpt]
Memcached::get() [tests/experimental/get.phpt]
Memcached::getByKey() with CAS [tests/experimental/get_bykey_cas.phpt]
Memcached::getDelayedByKey() [tests/experimental/getdelayed_bykey.phpt]
Memcached::getDelayedByKey() with CAS [tests/experimental/getdelayed_bykey_cas.phpt]
Memcached getDelayed non string keys [tests/experimental/getdelayed_nonstring_keys.phpt]
Memcached::getMulti() bad server [tests/experimental/getmulti_badserver.phpt]
Memcached::getMultiByKey() [tests/experimental/getmulti_bykey.phpt]
Memcached::getMulti() with empty array [tests/experimental/getmulti_empty.phpt]
Memcached::phpinfo() [tests/experimental/moduleinfo.phpt]
Compress with 0 factor and get [tests/experimental/setget_zero_factor.phpt]
Memcached::setMultiByKey() with bad serialize [tests/experimental/setmulti_badserialize.phpt]
Memcached::getStats() [tests/experimental/stats.phpt]
Memcached::getStats() with bad server [tests/experimental/stats_badserver.phpt]
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