在Laravel artisan Schedule Command中->after()是一个字符串 - ->after() on Laravel artisan Schedule Command with closure is a string?

->after() on Laravel artisan Schedule Command with closure is a string?

$slackNotify = function() use (&$info) { ... };
$schedule->command('Calc:RPI 1 2015')->cron('0 */2 * 8-12 *')
    ->withoutOverlapping()->sendOutputTo($this->path . 'rpi.html')
    ->after($slackNotify('My message here'));

错误:参数1传递给Illuminate'Console'Scheduling'Event::after()必须是Closure, string given，…的实例

为什么它认为$slackNotify(...)是字符串?

原来我使用的是lambda而不是匿名函数(几乎是相同的东西，但仍然不是)。

->after()命令需要一个匿名函数，所以我只需要添加它并将lambda传递给它:

WAS/Lambda:

->after($slackNotify('My Message Here'));

IS/anonymous:

->after(function() use ($slackNotify) {$slackNotify('My Message Here');});

感谢rizqi帮我解释我到底在做什么