Reloading .env variables without restarting server

问题:

My Laravel 5 has run OK until the database was configured, then found this error:

SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known

Doing some research it seems that I configured MySQL access too late, so I should restart the server in order to get the correct environment variables. Well, I'm using Dreamhost's shared server and I just can't do that.

How should I fix this issue?

Thanks

回答1:

If you have run php artisan config:cache on your server, then your Laravel app could cache outdated config settings that you've put in the .env file.

Run php artisan config:clear to fix that.

回答2:

It's possible that your configuration variables are cached. Verify your config/app.php as well as your .env file then try

php artisan cache:clear

on the command line.

回答3:

In case anybody stumbles upon this question who cannot reload their webserver (long running console command like a queue runner) or needs to reload their .env file mid-request, i found a way to properly reload .env variables in laravel 5.

use Dotenv;
use InvalidArgumentException;

try {
    Dotenv::makeMutable();
    Dotenv::load(app()->environmentPath(), app()->environmentFile());
    Dotenv::makeImmutable();
} catch (InvalidArgumentException $e) {
    //
}

回答4:

A short solution:

use Dotenv;

with(new Dotenv(app()->environmentPath(), app()->environmentFile()))->overload();
with(new LoadConfiguration())->bootstrap(app());

In my case I needed to re-establish database connection after altering .env programmatically, but it didn't work , If you get into this trouble try this

app('db')->purge($connection->getName()); 

after reloading .env , that's because Laravel App could have accessed the default connection before and the \Illuminate\Database\DatabaseManager needs to re-read config parameters.

回答5:

In config/database.php I changed the default DB connection from mysql to sqlite. I deleted the .env file (actually renamed it) and created the sqlite file with touch storage/database.sqlite. The migration worked with sqlite.

Then I switched back the config/database.php default DB connection to mysql and recovered the .env file. The migration worked with mysql.

It doesn't make sense I guess. Maybe was something serverside.