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<?php
/*
* This file is part of the Predis package.
*
* (c) 2009-2020 Daniele Alessandri
* (c) 2021-2025 Till Krüss
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
require __DIR__ . '/shared.php';
// Starting from Redis 2.0 clients can subscribe and listen for events published
// on certain channels using a Publish/Subscribe (PUB/SUB) approach.
// Create a client and disable r/w timeout on the socket
$client = new Predis\Client($single_server + ['read_write_timeout' => 0]);
// Initialize a new pubsub consumer.
$pubsub = $client->pubSubLoop();
// Subscribe to your channels
$pubsub->subscribe('control_channel', 'notifications');
// Start processing the pubsub messages. Open a terminal and use redis-cli
// to push messages to the channels. Examples:
// redis-cli PUBLISH notifications "this is a test"
// redis-cli PUBLISH control_channel quit_loop
foreach ($pubsub as $message) {
switch ($message->kind) {
case 'subscribe':
echo "Subscribed to {$message->channel}", PHP_EOL;
break;
case 'message':
if ($message->channel == 'control_channel') {
if ($message->payload == 'quit_loop') {
echo 'Aborting pubsub loop...', PHP_EOL;
$pubsub->unsubscribe();
} else {
echo "Received an unrecognized command: {$message->payload}.", PHP_EOL;
}
} else {
echo "Received the following message from {$message->channel}:",
PHP_EOL, " {$message->payload}", PHP_EOL, PHP_EOL;
}
break;
}
}
// Always unset the pubsub consumer instance when you are done! The
// class destructor will take care of cleanups and prevent protocol
// desynchronizations between the client and the server.
unset($pubsub);
// Say goodbye :-)
$version = redis_version($client->info());
echo "Goodbye from Redis $version!", PHP_EOL;
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