Write it in the form of an anonymous function

return [
    'adminEmail'=>'admin@xx.com',
    'cronJobs'=>[
        'contact/send'=>[
                //code
        ],
        'contact/hsend'=>[
            'cron'=>function(){
                //todo 获取数据库中的定时配置（可以在外面写个自定义函数获取）
                $_cron2 = you_function();
                return $_cron2;
            }
        ]
    ]
]



<?php

$data = [
    'cronJobs'=>[
        'send'=>[
            //code
        ],
        'hsend'=>[
            'cron'=>function(){
                return '888888';
            }
        ]
    ]
];
echo $data['cronJobs']['hsend']['cron'](); //这么写

(Thank you for the invitation) Sorry, I don’t know much about yii2. But for the TP approach, I will dynamically generate the time configuration, read the database setting time in the public controller, and generate the configuration parameters. In this way, you can use it happily (you can refer to it, I hope it will be helpful to you).