php script for delete keys by pattern from redis cluster

redis-clean.php

<?php

$hosts = [
    'host1:port1',
    'host2:port2',
];

foreach($hosts as $host){
    list($host, $port) = explode(':', $host);
    echo sprintf("-- %s:%d \n", $host, $port);
    $redis = new Redis();
    $redis->connect($host, $port);

    $it = null;
    $redis->setOption(Redis::OPT_SCAN, Redis::SCAN_RETRY);

    $i = 0;
    do {
        $keys = $redis->scan($it, 'key:mask:*', 1000);

        foreach ($keys as $key) {
            $i++;
            $redis->del($key);
            // echo sprintf("%s \n", $key);
        }
        usleep(200);
    } while($it > 0);

    echo sprintf("removed %d keys \n", $i);
    
    unset($redis);
}