## migrate ##### Description Migrates a key to a different Redis instance. 迁移一个KEY岛不同的REIDS实例。 ##### Parameters *host* string. The destination host *port* integer. The TCP port to connect to. *key* string. The key to migrate. *destination-db* integer. The target DB. *timeout* integer. The maximum amount of time given to this transfer. ##### Examples ``` <pre class="calibre16">$redis->migrate('backup', 6379, 'foo', 0, 3600); ``` ##