PHP code example of umwerk / predis

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

umwerk / predis example snippets

// Prepend a base path if Predis is not available in your "include_path".

$client = new Predis\Client();
$client->set('foo', 'bar');
$value = $client->get('foo');

// Parameters passed using a named array:
$client = new Predis\Client([
    'scheme' => 'tcp',
    'host'   => '10.0.0.1',
    'port'   => 6379,
]);

// Same set of parameters, passed using an URI string:
$client = new Predis\Client('tcp://10.0.0.1:6379');

$client = new Predis\Client([
    'tcp://10.0.0.1?alias=first-node',
    ['host' => '10.0.0.2', 'alias' => 'second-node'],
]);

$client = new Predis\Client($parameters, ['profile' => '2.8', 'prefix' => 'sample:']);

// Parameters  ['tcp://10.0.0.1?alias=master', 'tcp://10.0.0.2?alias=slave-01'];
$options    = ['replication' => true];

$client = new Predis\Client($parameters, $options);

$parameters = ['tcp://10.0.0.1?alias=master', 'tcp://10.0.0.2?alias=slave-01'];
$options    = ['replication' => function () {
    // Set scripts that won't trigger a switch from a slave to the master node.
    $strategy = new Predis\Replication\ReplicationStrategy();
    $strategy->setScriptReadOnly($LUA_SCRIPT);

    return new Predis\Connection\Aggregate\MasterSlaveReplication($strategy);
}];

$client = new Predis\Client($parameters, $options);
$client->eval($LUA_SCRIPT, 0);             // Sticks to slave using `eval`...
$client->evalsha(sha1($LUA_SCRIPT), 0);    // ... and `evalsha`, too.

$parameters = ['tcp://10.0.0.1', 'tcp://10.0.0.2'];
$options    = ['cluster' => 'redis'];

$client = new Predis\Client($parameters, $options);

// Executes a pipeline inside the given callable block:
$responses = $client->pipeline(function ($pipe) {
    for ($i = 0; $i < 1000; $i++) {
        $pipe->set("key:$i", str_pad($i, 4, '0', 0));
        $pipe->get("key:$i");
    }
});

// Returns a pipeline that can be chained thanks to its fluent interface:
$responses = $client->pipeline()->set('foo', 'bar')->get('foo')->execute();

// Executes a transaction inside the given callable block:
$responses = $client->transaction(function ($tx) {
    $tx->set('foo', 'bar');
    $tx->get('foo');
});

// Returns a transaction that can be chained thanks to its fluent interface:
$responses = $client->transaction()->set('foo', 'bar')->get('foo')->execute();

// Define a new command by extending Predis\Command\Command:
class BrandNewRedisCommand extends Predis\Command\Command
{
    public function getId()
    {
        return 'NEWCMD';
    }
}

// Inject your command in the current profile:
$client = new Predis\Client();
$client->getProfile()->defineCommand('newcmd', 'BrandNewRedisCommand');

$response = $client->newcmd();

$response = $client->executeRaw(['SET', 'foo', 'bar']);

// Define a new script command by extending Predis\Command\ScriptCommand:
class ListPushRandomValue extends Predis\Command\ScriptCommand
{
    public function getKeysCount()
    {
        return 1;
    }

    public function getScript()
    {
        return <<<LUA
math.randomseed(ARGV[1])
local rnd = tostring(math.random())
redis.call('lpush', KEYS[1], rnd)
return rnd
LUA;
    }
}

// Inject the script command in the current profile:
$client = new Predis\Client();
$client->getProfile()->defineCommand('lpushrand', 'ListPushRandomValue');

$response = $client->lpushrand('random_values', $seed = mt_rand());

$client = new Predis\Client('tcp://127.0.0.1', [
    'connections' => [
        'tcp'  => 'Predis\Connection\PhpiredisStreamConnection',  // PHP stream resources
        'unix' => 'Predis\Connection\PhpiredisSocketConnection',  // ext-socket resources
    ],
]);

class MyConnectionClass implements Predis\Connection\NodeConnectionInterface
{
    // Implementation goes here...
}

// Use MyConnectionClass to handle connections for the `tcp` scheme:
$client = new Predis\Client('tcp://127.0.0.1', [
    'connections' => ['tcp' => 'MyConnectionClass'],
]);