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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';
// Create a Relay client and disable r/w timeout on the connection
$client = new Predis\Client(
$single_server + ['read_write_timeout' => 0],
['connections' => 'relay']
);
// Initialize a new pubsub consumer.
$pubsub = $client->pubSubLoop();
// When using Relay you cannot use foreach-loops to iterate
// over messages instead use a callback function
$poorMansKafka = function ($message, $client) {
switch ($message->kind) {
case 'subscribe':
echo "Subscribed to {$message->channel}", PHP_EOL;
break;
case 'message':
case 'pmessage':
if ($message->channel == 'control_channel') {
if ($message->payload == 'quit_loop') {
echo 'Aborting pubsub loop...', PHP_EOL;
$client->unsubscribe();
} else {
echo "Received an unrecognized command: {$message->payload}.", PHP_EOL;
}
} else {
echo "Received the message from `{$message->channel}` channel:",
PHP_EOL, " {$message->payload}", PHP_EOL, PHP_EOL;
}
}
};
// Subscribe to your channels and start processing the messages.
$pubsub->subscribe('control_channel', 'notifications', $poorMansKafka);
// 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
// When using Relay, there is no need to unset the pubsub consumer instance when you are done
// Say goodbye :-)
$version = redis_version($client->info());
echo "Goodbye from Redis $version!", PHP_EOL;
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