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<?php
/*
* This file is part of the Predis package.
*
* (c) Daniele Alessandri <suppakilla@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
require __DIR__.'/shared.php';
// Predis supports master / slave replication scenarios where write operations
// are performed on the master server and read operations are executed against
// one of the slaves. The behavior of commands or EVAL scripts can be customized
// at will. As soon as a write operation is performed the client switches to the
// master server for all the subsequent requests (either reads and writes).
//
// This example must be executed using the second Redis server configured as the
// slave of the first one (see the "SLAVEOF" command).
//
$parameters = array(
'tcp://127.0.0.1:6379?database=15&alias=master',
'tcp://127.0.0.1:6380?database=15&alias=slave',
);
$options = array('replication' => true);
$client = new Predis\Client($parameters, $options);
// Read operation.
$exists = $client->exists('foo') ? 'yes' : 'no';
$current = $client->getConnection()->getCurrent()->getParameters();
echo "Does 'foo' exist on {$current->alias}? $exists.", PHP_EOL;
// Write operation.
$client->set('foo', 'bar');
$current = $client->getConnection()->getCurrent()->getParameters();
echo "Now 'foo' has been set to 'bar' on {$current->alias}!", PHP_EOL;
// Read operation.
$bar = $client->get('foo');
$current = $client->getConnection()->getCurrent()->getParameters();
echo "We fetched 'foo' from {$current->alias} and its value is '$bar'.", PHP_EOL;
/* OUTPUT:
Does 'foo' exist on slave? yes.
Now 'foo' has been set to 'bar' on master!
We fetched 'foo' from master and its value is 'bar'.
*/