PHP Extensions

apcu In-memory object caching bcmath Precise maths for money and large numbers bz2 Bzip2 archives calendar Calendar and date conversion functions On ctype On curl Fetching URLs and calling APIs dba Database (dbm-style) abstraction layer enchant Spell-checking via the Enchant library exif Read metadata (EXIF) from images On ffi On fileinfo File type detection (PHP core) On ftp FTP client functions On gd Image resizing and thumbnails gettext Native language translation (gettext) On gmp Very large number maths iconv Character-set conversion On igbinary Faster, smaller data storage for Redis and Memcached imagick Advanced image processing imap Reading mail over IMAP intl Locales, currency and date formatting ioncube IonCube Loader (server-level, required for WHMCS) required ldap Directory authentication mbstring Multi-byte text — required for non-English content memcached Memcached caching mongodb MongoDB database access mysqli MySQL / MariaDB database access — needed by WordPress and most apps mysqlnd MySQL native driver (PHP core) odbc ODBC database connectivity opcache Compiles PHP once and reuses it — big speed win On pdo PDO database layer (PHP core) On pdo_mysql MySQL access through PDO, used by Laravel and modern frameworks pgsql PostgreSQL database access phar On pspell Spell checking via pspell/aspell readline On redis Redis caching and sessions shmop On soap SOAP web services sockets On sodium Modern encryption — needed by Magento, Moodle and Nextcloud On sqlite3 SQLite databases sysvmsg On sysvsem On sysvshm On tidy Cleaning up HTML tokenizer On xml Reading and writing XML xsl XSLT transformations yaml YAML config files, used by Symfony zip Creating and reading ZIP archives