ошибки в php5

[zanoza73]

как исправить эти ошибки:
Failed loading opcache.so:  opcache.so: cannot open shared object file: No such file or directory
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/apcu.so' - /usr/lib/php5/20100525/apcu.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/json.so' - /usr/lib/php5/20100525/json.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/memcached.so' - /usr/lib/php5/20100525/memcached.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  Module 'apc' already loaded in Unknown on line 0
PHP Warning:  Module 'mcrypt' already loaded in Unknown on line 0

все эти модули установлены, но не хотят работать. debian 7.5 x64  php5.4.4