PHP extensions

Available extensions and modules

Clever Cloud PHP with Apache applications enables the following extensions by default:

amqp, bcmath, bz2, calendar, ctype, curl, dba, exif, fileinfo, filter, ftp, gd, gettext, gmp, iconv, imagick, imap, intl, json, ldap, libsodium, mbstring, mcrypt, memcached, memcache, mongodb, mysql, mysqli, opcache, pcntl, pcre, pdo-mysql, pdo-odbc, pdo-pgsql, pdo-sqlite, pgsql, phar, posix, pspell, readline, redis, session, shmop, sockets, sodium, solr, ssh2, ssl, tidy, tokenizer, unixodbc, xml, xmlrpc, xsl, zip, zlib.

You can also enable the following extensions on demand:

apcu, blackfire, elastic_apm_agent, event, excimer, geos, gnupg, grpc, ioncube, imap, mailparse, maxminddb, mongo, newrelic, oauth, opentelemetry, pcs, PDFlib, pdo_sqlsrv, protobuf, pspell, rdkafka, scoutapm, sqlsrv, sqreen, tideways, uopz, uploadprogress, xdebug, xmlrpc, yaml

You can check extensions and versions by viewing the phpinfo() for:

• PHP 5.6
• PHP 7.1
• PHP 7.2
• PHP 7.3
• PHP 7.4
• PHP 8.0
• PHP 8.1
• PHP 8.2
• PHP 8.3
• PHP 8.4
• PHP 8.5

If you have a request about extensions, contact Clever Cloud Support.

Enable specific extensions

Some extensions need to be enabled explicitly. To do so, set the corresponding environment variable:

• APCu: set ENABLE_APCU to true.

  APCu is an in-memory key-value store for PHP. Keys are of type string and values can be any PHP variables.

• Elastic APM Agent: set ENABLE_ELASTIC_APM_AGENT to true (default if ELASTIC_APM_SERVER_URL is defined).

  Elastic APM agent is Elastic’s APM agent extension for PHP. The PHP agent enables you to trace the execution of operations in your application, sending performance metrics and errors to the Elastic APM server. Warning: This extension is available starting PHP 7.2.

• Event: set ENABLE_EVENT to true.

  Event is an extension to schedule I/O, time and signal based events.

• Excimer: set ENABLE_EXCIMER to true.

  Excimer is an extension that provides a low-overhead interrupting timer and sampling profiler.

• GEOS: set ENABLE_GEOS to true.

  GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).

• GnuPG: set ENABLE_GNUPG to true.

  GnuPG is an extension that provides methods to interact with GNU Privacy Guard (OpenPGP implementation).

• gRPC: set ENABLE_GRPC to true.

  gRPC is an extension for the high performance, open source, general RPC framework layered over HTTP/2.

• IonCube: set ENABLE_IONCUBE to true.

  IonCube is a tool to obfuscate PHP code. It’s often used by paying Prestashop and WordPress plugins.

• IMAP (only for PHP 8.4+): set ENABLE_IMAP to true.

  IMAP is an extension to operate with the IMAP protocol, as well as the NNTP, POP3, and local mailbox access methods.

• Mailparse: set ENABLE_MAILPARSE to true.

  Mailparse is an extension for parsing and working with email messages. It can deal with RFC 822 and RFC 2045 (MIME) compliant messages.

• MaxMind DB: set ENABLE_MAXMINDDB to true.

  Extension for reading MaxMind DB files. MaxMind DB is a binary file format that stores data indexed by IP address subnets (IPv4 or IPv6).

• Mongo: set ENABLE_MONGO to true.

  MongoDB is a NoSQL Database. This extension allows to use it from PHP. Warning: this extension is now superseded by the mongodb extension. It is provided for backward compatibility.

• NewRelic: set ENABLE_NEWRELIC to true.

  Newrelic Agent for PHP. Newrelic is a software analytics tool.

• OAuth: set ENABLE_OAUTH to true.

  OAuth consumer extension. OAuth is an authorization protocol built on top of HTTP.

• OpenTelemetry: set ENABLE_OPENTELEMETRY to true.

  OpenTelemetry is an extension to facilitate the generation, export, collection of telemetry data such as traces, metrics, and logs.

• PCS: set ENABLE_PCS to true.

  PCS provides a fast and easy way to mix C and PHP code in your PHP extension.

• PDFlib: set ENABLE_PDFlib to true.

  PDFlib is a commercial library for generating PDF files. It provides a PHP extension to create and manipulate PDF documents.

• Protobuf: set ENABLE_PROTOBUF to true.

  Protobuf is an extension for the language-neutral, platform-neutral extensible mechanism for serializing structured data.

• Pspell: set ENABLE_PSPELL to true.

  Pspell is an extension to check the spelling of words and offer suggestions.

• Rdkafka: set ENABLE_RDKAFKA to true.

  PHP-rdkafka is a thin librdkafka binding providing a working PHP 5 / PHP 7 Kafka client.

• Scout APM: set ENABLE_SCOUTAPM to true.

  The Scout APM extension to provide additional capabilities to application monitoring over just using the base PHP userland library.

• SQL Server: set ENABLE_SQLSRV or ENABLE_PDO_SQLSRV to true.

  These extensions enable drivers that rely on the Microsoft ODBC Driver to handle the low-level communication with SQL Server. The SQLSRV extension provides a procedural interface while the PDO_SQLSRV extension implements PDO for accessing data in all editions of SQL Server 2012 and later (including Azure SQL DB).

• Sqreen: The Sqreen agent is started automatically after adding the environment variables (SQREEN_API_APP_NAME and SQREEN_API_TOKEN).

• Tideways: set ENABLE_TIDEWAYS to true.

  Tideways is an extension that provides profiling and monitoring capabilities for PHP applications.

• Uopz: set ENABLE_UOPZ to true.

  The uopz extension is focused on providing utilities to aid with unit testing PHP code.

• Uploadprogress: set ENABLE_UPLOADPROGRESS to true.

  The uploadprogress extension is used to track the progress of a file download.

• XDebug: set ENABLE_XDEBUG to true.

  XDebug is a debugger and profiler tool for PHP.

• XML RPC: set ENABLE_XMLRPC to true.

  XML-RPC is an extension for server and client bindings

• YAML: set ENABLE_YAML to true.

  YAML is an extension providing a YAML-1.1 parser and emitter

Disable extensions

You can use DISABLE_<extension_name>=true in your environment variables to disable an extension.