/**
* Increment a Redis counter by the amount specified
*
* @param string $key
* @param int $offset
* @param string $group
* @return bool
*/
public function increment($key, $offset = 1, $group = 'default')
{
$derived_key = $this->build_key($key, $group);
$offset = (int) $offset;
// If group is a non-Redis group, save to internal cache, not Redis
if (in_array($group, $this->no_redis_groups) || !$this->redis_status()) {
$value = $this->get_from_internal_cache($derived_key, $group);
$value += $offset;
$this->add_to_internal_cache($derived_key, $value);
return true;
}
// Save to Redis
$result = $this->parse_predis_response($this->redis->incrBy($derived_key, $offset));
$this->add_to_internal_cache($derived_key, (int) $this->redis->get($derived_key));
return $result;
}
<?php
require 'Predis/Autoloader.php';
Predis\Autoloader::register();
$redis = new Predis\Client(array('host' => '127.0.0.1'));
$redis->set('counter', 0);
$redis->incrBy('counter', 7);
$counter = $redis->get('counter');
print $counter;