laravel redis scan的用法

非递归获取满足pattern的key(generator)

$cursor = 0;
do {
    list($cursor, $keys) = Redis::scan($cursor, ['match' => $pattern, 'count' => 100]);
    foreach ($keys as $key) {
        yield $key;
    }
} while ($cursor);

ref

• https://stackoverflow.com/questions/35477172/laravel-and-redis-scan
• redis scan和keys的差别： https://www.cnblogs.com/guanbin-529/p/12741638.html
• predis commands: https://squizzle.me/php/predis/doc/Commands#scan