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Phpiredis is an extension for PHP 5.x to 8.x based on hiredis that provides a simple and efficient client for Redis and a fast incremental parser / serializer for the RESP protocol.


Building and using this extension requires hiredis (>=0.14, >=1.0) to be installed on the system. hiredis is usually available in the repositories of most Linux distributions, alternatively it is possible to build it by fetching the code from its repository.

git clone
cd phpiredis
phpize && ./configure --enable-phpiredis
make && make install

When the configuration script is unable to locate hiredis on your system, you can specify in which directory it can be found using --with-hiredis-dir= (e.g. --with-hiredis-dir=/usr/local).

Phpiredis provides a basic test suite that can be launched with make test. Tests require a running instance of redis-server listening on but make sure that your server does not hold data you are interested: you could end up losing everything stored on it!

If you notice a failing test or a bug, you can contribute by opening a pull request on GitHub or simply file a bug on our issue tracker.


Connecting to Redis is as simple as calling the phpiredis_connect() function with a server address as the first parameter and an optional port number when the server is listening to a different port than the default 6379:

$redis = phpiredis_connect('', 6379);      // normal connection
$redis = phpiredis_pconnect('', 6379);     // persistent connection

Alternatively you can connect to redis using UNIX domain socket connections.

$redis = phpiredis_connect('/tmp/redis.sock');      // normal connection
$redis = phpiredis_pconnect('/tmp/redis.sock');     // persistent connection

Once the connection is established, you can send commands to Redis using phpiredis_command_bs() or pipeline them using phpiredis_multi_command_bs():

$response = phpiredis_command_bs($redis, array('DEL', 'test'));

$response = phpiredis_multi_command_bs($redis, array(
    array('SET', 'test', '1'),
    array('GET', 'test'),

The _bs suffix indicates that these functions can handle binary key names or values by using the unified Redis protocol available since Redis >= 1.2.

Commands can still be sent using the old and deprecated inline protocol using phpiredis_command() and phpiredis_multi_command() (note the lack of the _bs suffix) but it's highly discouraged and these functions will be removed in future versions of phpiredis.

$response = phpiredis_command($redis, 'DEL test');

$response = phpiredis_multi_command($redis, array(
    'SET test 1',
    'GET test',


Any kind of contribution is extremely welcome! Just fork the project on GitHub, work on new features or bug fixes using feature branches and open pull-requests with concise but complete descriptions of your changes. If you are unsure about a proposal, you can just open an issue to discuss it before writing actual code.


Daniele Alessandri (current maintainer) Sebastian Waisbrot (original developer)


The code for phpiredis is distributed under the terms of the BSD license (see LICENSE).