Composer update method to update and lower the version

Below, composer uses the tutorial column to introduce to you how to update and lower the version of composer update. I hope it will be helpful to friends in need!

1. I originally wanted to upgrade to 5.0.23. I updated in the root directory and directly upgraded to 5.1.31. I felt that the version was a bit high. I wanted to downgrade to 5.0.23. The plan is as follows ：

Enter the root directory vim and open the composer.json file

"require": {
        "php": ">=5.4.0",
        "topthink/framework": "^5.0",
        "topthink/think-captcha": "^1.0",
        "topthink/think-image": "^1.0",
        "topthink/think-helper": "^1.0",
        "ezyang/htmlpurifier": "^4.9"
    },

Mainly look at this code. If you want to update to the desired version, you only need to modify topthink /framework

Explanation: "^5.0" The ^ in front will directly detect the latest version update

Modification method 1: "topthink/framework": "5.0.*" Remove the ^ in front and add it after *, indicating updating to the latest version of 5.0.

Modification method 2: "topthink/framework": "5.0.23" specifies the version, indicating updating to version 5.0.23

Running results:

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