Detailed explanation of the solution to the project login error in the Laravel framework: The MAC is invalid.

After the Laravel project is deployed to the server and the database is imported successfully

Backend login error:

The reason is Laravel's APP_KEY and encrypt() functions Encryption issue. (encrypt() is Laravel's helper function, which is equivalent to the abbreviation of Crypt::encrypt())

Once it is regenerated with php artisan key:generate APP_KEY, when the decrypt() function decrypts, the MAC is invalid exception will be reported. This is because the APP_KEY change causes the MAC information to change, and the decrypt() function will report an exception.

Solution:

Method 1. Use encrypt() to encrypt again, log in again in the background, OK.

Method 2. encrypt() encryption is not conducive to project transplantation and deployment. Adopt the suggestion of this blog post and temporarily use hash encryption.

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