Redis pipeline laravel

$a = array("1","2","3");Redis::pipeline(function($pipe){   for ($i = 0; $i < count($a); $i++)   {      $pipe->set("key:$a", $a);   }});<<<<<<<<$a undefied 

解决方法$a = array("1","2","3");Redis::pipeline(function($pipe) use ($a){   for ($i = 0; $i < count($a); $i++)   {      $pipe->set("key:$a", $a);   }});

参考:参考链接