Las extensiones (librerías) disponibles en PHP 5.5 en servidores con selector de versiones son:
| apcu | http | mysql | propro | tidy | |||||
| apm | igbinary | mysqli | pspell | timezonedb | |||||
| bcmath | imagick | mysqlnd | quickhash | trader | |||||
| big_int | imap | ncurses | radius | translit | |||||
| bitset | inotify | nd_mysql | raphf | uploadprogress | |||||
| bz2_filter | interbase | nd_mysqli | rar | uri_template | |||||
| dba | intl | nd_pdo_mysql | recode | uuid | |||||
| dbase | ioncube_loader | oauth | redis | wddx | |||||
| dbx | ioncube_loader_4 | oci8 | rsync | weakref | |||||
| dom | jsmin | odbc | snmp | xcache_3 | |||||
| doublemetaphone | json | opcache | soap | xdebug | |||||
| eio | ldap | sockets | xmlreader | ||||||
| enchant | libevent | pdo | sourceguardian | xmlrpc | |||||
| ffmpeg | lzf | pdo_dblib | spl_types | xmlwriter | |||||
| fileinfo | magickwand | pdo_firebird | ssh2 | xrange | |||||
| gd | mailparse | pdo_mysql | stats | xsl | |||||
| gender | mbstring | pdo_odbc | stem | yaf | |||||
| geoip | mcrypt | pdo_pgsql | stomp | yaz | |||||
| gmagick | memcache | pdo_sqlite | suhosin | zend_guard_loader | |||||
| gnupg | memcached | pgsql | sybase_ct | zip | |||||
| haru | mongo | phalcon | sysvmsg | ||||||
| hidef | msgpack | phar | sysvsem | ||||||
| htscanner | mssql | posix | sysvshm |
