Standard extensions
The extensions listed below are part of official PHP releases and are thus
available and fully supported:
| PHP Extension | Debian Binary Package | Debian Source Package | PHP Versions | 
| bcmath | phpX.Y-bcmath | phpX.Y |  | 
| bz2 | phpX.Y-bz2 | phpX.Y |  | 
| calendar | phpX.Y-common | phpX.Y |  | 
| Core | built-in | phpX.Y |  | 
| ctype | phpX.Y-common | phpX.Y |  | 
| curl | phpX.Y-curl | phpX.Y |  | 
| date | built-in | phpX.Y |  | 
| dba | phpX.Y-dba | phpX.Y |  | 
| dom | phpX.Y-xml | phpX.Y |  | 
| enchant | phpX.Y-enchant | phpX.Y |  | 
| ereg | built-in | phpX.Y | = 5.6 | 
| exif | phpX.Y-common | phpX.Y |  | 
| FFI | phpX.Y-common | phpX.Y | >= 7.4 | 
| fileinfo | phpX.Y-common | phpX.Y |  | 
| filter | built-in | phpX.Y |  | 
| ftp | phpX.Y-common | phpX.Y |  | 
| gd | phpX.Y-gd | phpX.Y |  | 
| gettext | phpX.Y-common | phpX.Y |  | 
| gmp | phpX.Y-gmp | phpX.Y |  | 
| hash | built-in | phpX.Y |  | 
| iconv | phpX.Y-common | phpX.Y |  | 
| imap | phpX.Y-imap | phpX.Y | <= 8.3 | 
| interbase | phpX.Y-interbase | phpX.Y | <= 7.3 | 
| intl | phpX.Y-intl | phpX.Y |  | 
| json | built-in | phpX.Y | >= 8.0 | 
| json | phpX.Y-json | phpX.Y | <= 7.4 | 
| ldap | phpX.Y-ldap | phpX.Y |  | 
| libxml | built-in | phpX.Y |  | 
| mbstring | phpX.Y-mbstring | phpX.Y |  | 
| mcrypt | phpX.Y-mcrypt | phpX.Y | <= 7.1 | 
| mhash | built-in | phpX.Y | = 5.6 | 
| mssql | phpX.Y-sybase | phpX.Y | = 5.6 | 
| mysql | phpX.Y-mysql | phpX.Y | = 5.6 | 
| mysqli | phpX.Y-mysql | phpX.Y |  | 
| mysqlnd | phpX.Y-mysql | phpX.Y |  | 
| odbc | phpX.Y-odbc | phpX.Y |  | 
| openssl | built-in | phpX.Y |  | 
| pcntl | built-in | phpX.Y |  | 
| pcre | built-in | phpX.Y |  | 
| pdo_dblib | phpX.Y-sybase | phpX.Y |  | 
| PDO_Firebird | phpX.Y-interbase | phpX.Y |  | 
| pdo_mysql | phpX.Y-mysql | phpX.Y |  | 
| PDO_ODBC | phpX.Y-odbc | phpX.Y |  | 
| pdo_pgsql | phpX.Y-pgsql | phpX.Y |  | 
| pdo_sqlite | phpX.Y-sqlite3 | phpX.Y |  | 
| PDO | phpX.Y-common | phpX.Y |  | 
| pgsql | phpX.Y-pgsql | phpX.Y |  | 
| Phar | phpX.Y-common | phpX.Y |  | 
| posix | phpX.Y-common | phpX.Y |  | 
| pspell | phpX.Y-pspell | phpX.Y | <= 8.3 | 
| random | built-in | phpX.Y | >= 8.2 | 
| readline | phpX.Y-readline | phpX.Y |  | 
| recode | phpX.Y-recode | phpX.Y | <= 7.3 | 
| Reflection | built-in | phpX.Y |  | 
| session | built-in | phpX.Y |  | 
| shmop | phpX.Y-common | phpX.Y |  | 
| SimpleXML | phpX.Y-xml | phpX.Y |  | 
| snmp | phpX.Y-snmp | phpX.Y |  | 
| soap | phpX.Y-soap | phpX.Y |  | 
| sockets | phpX.Y-common | phpX.Y |  | 
| sodium | built-in | phpX.Y | >= 7.2 | 
| SPL | built-in | phpX.Y |  | 
| sqlite3 | phpX.Y-sqlite3 | phpX.Y |  | 
| standard | built-in | phpX.Y |  | 
| sysvmsg | phpX.Y-common | phpX.Y |  | 
| sysvsem | phpX.Y-common | phpX.Y |  | 
| sysvshm | phpX.Y-common | phpX.Y |  | 
| tidy | phpX.Y-tidy | phpX.Y |  | 
| tokenizer | phpX.Y-common | phpX.Y |  | 
| wddx | phpX.Y-xml | phpX.Y | <= 7.3 | 
| xml | phpX.Y-xml | phpX.Y |  | 
| xmlreader | phpX.Y-xml | phpX.Y |  | 
| xmlrpc | phpX.Y-xmlrpc | phpX.Y | <= 7.4 | 
| xmlwriter | phpX.Y-xml | phpX.Y |  | 
| xsl | phpX.Y-xml | phpX.Y |  | 
| Zend OPcache | phpX.Y-opcache | phpX.Y |  | 
| zip | phpX.Y-zip | phpX.Y |  | 
| zlib | built-in | phpX.Y |  | 
Supplementary extensions
Supported
| PHP Extension | Debian Binary Package | Debian Source Package | PHP Versions | 
| amqp | phpX.Y-amqp | php-amqp-1 | <= 7.3 | 
| amqp | phpX.Y-amqp | php-amqp | >= 7.4 | 
| apc | phpX.Y-apcu-bc | php-apcu-bc | >= 7.0, <= 7.4 | 
| apcu | phpX.Y-apcu | php-apcu-4 | = 5.6 | 
| apcu | phpX.Y-apcu | php-apcu | >= 7.0 | 
| ast | phpX.Y-ast | php-ast | >= 7.0 | 
| dio | phpX.Y-dio | php-dio | >= 8.0 | 
| gmagick | phpX.Y-gmagick | php-gmagick-1 | = 5.6 | 
| gmagick | phpX.Y-gmagick | php-gmagick | >= 7.0 | 
| gnupg | phpX.Y-gnupg | php-gnupg | <= 8.3 | 
| grpc | phpX.Y-grpc | php-grpc-5 | = 5.6 | 
| grpc | phpX.Y-grpc | php-grpc | >= 7.0 | 
| http | phpX.Y-http | php-pecl-http-2 | = 5.6 | 
| http | phpX.Y-http | php-pecl-http-3 | >= 7.0, <= 7.4 | 
| http | phpX.Y-http | php-pecl-http | >= 8.0 | 
| igbinary | phpX.Y-igbinary | php-igbinary-2 | = 5.6 | 
| igbinary | phpX.Y-igbinary | php-igbinary | >= 7.0 | 
| imagick | phpX.Y-imagick | php-imagick |  | 
| mailparse | phpX.Y-mailparse | php-mailparse-2 | = 5.6 | 
| mailparse | phpX.Y-mailparse | php-mailparse | >= 7.0 | 
| maxminddb | phpX.Y-maxminddb | php-maxminddb | >= 7.2 | 
| mcrypt | phpX.Y-mcrypt | php-mcrypt | >= 7.2 | 
| memcache | phpX.Y-memcache | php-memcache-3 | = 5.6 | 
| memcache | phpX.Y-memcache | php-memcache-4 | >= 7.0, <= 7.4 | 
| memcache | phpX.Y-memcache | php-memcache | >= 8.0 | 
| memcached | phpX.Y-memcached | php-memcached-2 | = 5.6 | 
| memcached | phpX.Y-memcached | php-memcached | >= 7.0, <= 8.3 | 
| mongodb | phpX.Y-mongodb | php-mongodb-1-11 | = 7.1 | 
| mongodb | phpX.Y-mongodb | php-mongodb-1-7 | = 5.6 | 
| mongodb | phpX.Y-mongodb | php-mongodb-1-9 | = 7.0 | 
| mongodb | phpX.Y-mongodb | php-mongodb | >= 7.4 | 
| msgpack | phpX.Y-msgpack | php-msgpack-5 | = 5.6 | 
| msgpack | phpX.Y-msgpack | php-msgpack | >= 7.0 | 
| opentelemetry | phpX.Y-opentelemetry | php-opentelemetry | >= 8.0 | 
| pcov | phpX.Y-pcov | php-pcov | >= 7.1 | 
| protobuf | phpX.Y-protobuf | php-protobuf-5 | = 5.6 | 
| protobuf | phpX.Y-protobuf | php-protobuf-8 | = 8.0 | 
| protobuf | phpX.Y-protobuf | php-protobuf | >= 7.0 | 
| raphf | phpX.Y-raphf | php-raphf-1 | = 5.6 | 
| raphf | phpX.Y-raphf | php-raphf | >= 7.0 | 
| rdkafka | phpX.Y-rdkafka | php-rdkafka | >= 7.0 | 
| redis | phpX.Y-redis | php-redis-4 | = 5.6 | 
| redis | phpX.Y-redis | php-redis-5 | >= 7.0, <= 7.1 | 
| redis | phpX.Y-redis | php-redis-6 | >= 7.2, <= 7.3 | 
| redis | phpX.Y-redis | php-redis | >= 7.4, <= 8.3 | 
| ssh2 | phpX.Y-ssh2 | php-ssh2-0 | = 5.6 | 
| ssh2 | phpX.Y-ssh2 | php-ssh2 | >= 7.0, <= 8.3 | 
| Xdebug | phpX.Y-xdebug | xdebug-2-5 | = 5.6 | 
| Xdebug | phpX.Y-xdebug | xdebug-2-8 | = 7.0 | 
| Xdebug | phpX.Y-xdebug | xdebug-2-9 | = 7.1 | 
| Xdebug | phpX.Y-xdebug | xdebug-3-1 | >= 7.2, <= 7.4 | 
| Xdebug | phpX.Y-xdebug | xdebug | >= 8.0 | 
| yaml | phpX.Y-yaml | php-yaml-1 | = 5.6 | 
| yaml | phpX.Y-yaml | php-yaml-2-0 | = 7.0 | 
| yaml | phpX.Y-yaml | php-yaml-2-2 | >= 7.1, <= 7.4 | 
| yaml | phpX.Y-yaml | php-yaml | >= 8.0 | 
| zmq | phpX.Y-zmq | php-zmq |  | 
Unsupported (but available, might be limited)
| PHP Extension | Debian Binary Package | Debian Source Package | PHP Versions | 
| decimal | phpX.Y-decimal | php-decimal | >= 7.0 | 
| ds | phpX.Y-ds | php-ds-1 | >= 7.0, <= 7.2 | 
| ds | phpX.Y-ds | php-ds | >= 7.3 | 
| excimer | phpX.Y-excimer | php-excimer | >= 7.1 | 
| gearman | phpX.Y-gearman | php-gearman-1 | = 5.6 | 
| gearman | phpX.Y-gearman | php-gearman | >= 7.0 | 
| geoip | phpX.Y-geoip | php-geoip | <= 7.4 | 
| imap | phpX.Y-imap | php-imap | = 8.4 | 
| inotify | phpX.Y-inotify | php-inotify-0 | = 5.6 | 
| inotify | phpX.Y-inotify | php-inotify | >= 7.0, <= 8.3 | 
| lua | phpX.Y-lua | php-lua-1 | = 5.6 | 
| lua | phpX.Y-lua | php-lua | >= 7.0, <= 7.4 | 
| lz4 | phpX.Y-lz4 | php-lz4 |  | 
| mongo | phpX.Y-mongo | php-mongo | = 5.6 | 
| mongodb | phpX.Y-mongodb | php-mongodb-1-16 | >= 7.2, <= 7.3 | 
| mysqlnd_ms | phpX.Y-mysqlnd-ms | php-mysqlnd-ms | = 5.6 | 
| OAuth | phpX.Y-oauth | php-oauth-1 | = 5.6 | 
| OAuth | phpX.Y-oauth | php-oauth | >= 7.0 | 
| oci8(*) | phpX.Y-oci8 | php-oci8-2-2 | >= 7.0, <= 7.4 | 
| oci8(*) | phpX.Y-oci8 | php-oci8-3-0 | = 8.0 | 
| oci8(*) | phpX.Y-oci8 | php-oci8-3-2 | = 8.1 | 
| oci8(*) | phpX.Y-oci8 | php-oci8 | >= 8.2 | 
| openswoole | phpX.Y-openswoole | php-openswoole | >= 8.1, <= 8.3 | 
| pdo_sqlsrv(*) | phpX.Y-pdo-sqlsrv | php-pdo-sqlsrv | >= 8.1 | 
| phalcon | phpX.Y-phalcon3 | php-phalcon3 | <= 7.1 | 
| phalcon | phpX.Y-phalcon4 | php-phalcon4 | >= 7.2, <= 7.4 | 
| phalcon | phpX.Y-phalcon5 | php-phalcon5 | >= 8.0, <= 8.3 | 
| phalcon | phpX.Y-phalcon | php-phalcon | = 8.4 | 
| pinba | phpX.Y-pinba | php-pinba | >= 7.0, <= 8.3 | 
| pq | phpX.Y-pq | php-pq | >= 7.0 | 
| propro | phpX.Y-propro | php-propro-1 | = 5.6 | 
| propro | phpX.Y-propro | php-propro | >= 7.0, <= 8.2 | 
| ps | phpX.Y-ps | php-ps-1-3 | = 5.6 | 
| ps | phpX.Y-ps | php-ps | >= 7.0 | 
| pspell | phpX.Y-pspell | php-pspell | = 8.4 | 
| psr | phpX.Y-psr | php-psr | >= 7.0 | 
| radius | phpX.Y-radius | php-radius | <= 7.4 | 
| rrd | phpX.Y-rrd | php-rrd-1 | = 5.6 | 
| rrd | phpX.Y-rrd | php-rrd | >= 7.0 | 
| smbclient | phpX.Y-smbclient | php-smbclient |  | 
| sodium | phpX.Y-sodium | php-sodium | >= 7.0, <= 7.1 | 
| solr | phpX.Y-solr | php-solr-2-4 | = 5.6 | 
| solr | phpX.Y-solr | php-solr | >= 7.0, <= 8.3 | 
| sqlsrv(*) | phpX.Y-sqlsrv | php-sqlsrv | >= 8.1 | 
| Stomp | phpX.Y-stomp | php-stomp |  | 
| swoole | phpX.Y-swoole | php-swoole | >= 7.2, <= 8.3 | 
| tideways_xhprof | phpX.Y-tideways | tideways | >= 7.0, <= 8.2 | 
| uopz | phpX.Y-uopz | php-uopz-6 | >= 7.1, <= 7.4 | 
| uopz | phpX.Y-uopz | php-uopz | >= 8.0 | 
| uploadprogress | phpX.Y-uploadprogress | php-uploadprogress-1 | <= 7.1 | 
| uploadprogress | phpX.Y-uploadprogress | php-uploadprogress | >= 7.2 | 
| uuid | phpX.Y-uuid | php-uuid | >= 7.0 | 
| vips | phpX.Y-vips | php-vips | >= 7.0 | 
| XCache | phpX.Y-xcache | xcache | = 5.6 | 
| xhprof | phpX.Y-xhprof | php-xhprof-0 | = 5.6 | 
| xhprof | phpX.Y-xhprof | php-xhprof | >= 7.0 | 
| xmlrpc | phpX.Y-xmlrpc | php-xmlrpc | >= 8.0 | 
| yac | phpX.Y-yac | php-yac-0 | = 5.6 | 
| yac | phpX.Y-yac | php-yac | >= 7.0 | 
| zstd | phpX.Y-zstd | php-zstd | >= 7.0 | 
(*) non-opensource extension for which we can’t provide security updates