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Till Krüss
54 lines
1.7 KiB
PHP
54 lines
1.7 KiB
PHP
<?php
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/*
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* This file is part of the Predis package.
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*
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* (c) 2009-2020 Daniele Alessandri
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* (c) 2021-2023 Till Krüss
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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require __DIR__.'/shared.php';
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// Predis supports master / slave replication scenarios where write operations
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// are performed on the master server and read operations are executed against
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// one of the slaves. The behavior of commands or EVAL scripts can be customized
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// at will. As soon as a write operation is performed the client switches to the
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// master server for all the subsequent requests (either reads and writes).
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//
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// This example must be executed using the second Redis server configured as the
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// slave of the first one (see the "SLAVEOF" command).
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//
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$parameters = [
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'tcp://127.0.0.1:6381?role=master&database=15',
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'tcp://127.0.0.1:6382?role=slave&database=15',
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];
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$options = ['replication' => 'predis'];
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$client = new Predis\Client($parameters, $options);
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// Read operation.
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$exists = $client->exists('foo') ? 'yes' : 'no';
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$current = $client->getConnection()->getCurrent()->getParameters();
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echo "Does 'foo' exist on {$current->role}? $exists.", PHP_EOL;
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// Write operation.
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$client->set('foo', 'bar');
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$current = $client->getConnection()->getCurrent()->getParameters();
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echo "Now 'foo' has been set to 'bar' on {$current->role}!", PHP_EOL;
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// Read operation.
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$bar = $client->get('foo');
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$current = $client->getConnection()->getCurrent()->getParameters();
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echo "We fetched 'foo' from {$current->role} and its value is '$bar'.", PHP_EOL;
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/* OUTPUT:
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Does 'foo' exist on slave? yes.
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Now 'foo' has been set to 'bar' on master!
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We fetched 'foo' from master and its value is 'bar'.
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*/
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