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I only learned about $argv after working for two years, which means it's very low!

咔咔
咔咔Original
2020-07-03 11:46:3410525browse
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Recently in the article about using laravel to implement rabbitmq, I encountered some problems when implementing the routing mode, focusing on the problem of command line parameter passing.

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1. Problems encountered in rabbitmq routing mode

You can find it in this code I saw an undefined variable $argv. To be honest, I have used the framework so much that I don’t even know what this thing is.

Kaka uses the laravle framework, and undeclared variables will directly report an error.

But this instance is indeed needed in routing mode, and it cannot be executed once to modify itrouting_keyI only learned about $argv after working for two years, which means its very low!

##II , reveal $argv

After searching

php argv, a clear explanation appeared in front of me. This guy is used to pass parameters to the script. ! Without further ado, first create a php file and then test it. I only learned about $argv after working for two years, which means its very low!

Create an index.php file in the web directory, and then print out $argvI only learned about $argv after working for two years, which means its very low! to execute index.php and execute the command php index kaka.

This is a bit interesting. The printed data is in the array form mentioned in the above information.

The first value is the file name to be executed, and the second parameter is the parameter carried to the script. I only learned about $argv after working for two years, which means its very low!At this time, go back and take a look at the rabbitmq code.

The data with index 1 is fault-tolerant, and this value is the required routing_key. I only learned about $argv after working for two years, which means its very low!Looking at the execution instructions given later, it is not difficult to understand why it is executed like this. I only learned about $argv after working for two years, which means its very low!

3. How to use laravel to carry instructions with parameters

Life has to go on, and the code still has to go on You have to masturbate, right? If you use a framework, you have to adapt to the usage of the framework.

Create a command firstphp artisan make:command TestCommandI only learned about $argv after working for two years, which means its very low!You can then see the TestController file.

signature is the command nameI only learned about $argv after working for two years, which means its very low!Execute it first! php artisan test:command, this 123 is in the handle method belowI only learned about $argv after working for two years, which means its very low!Execute the command with parameters in laravleI only learned about $argv after working for two years, which means its very low!I only learned about $argv after working for two years, which means its very low!Execute the commandphp artisan test:command kakaSee what happens.

Yes! It is the parameter after the instruction.

There are several ways to use Laralve to carry parameters. I won’t demonstrate them here. It’s very simple! I only learned about $argv after working for two years, which means its very low!

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