I want to create a Laravel web app that allows an admin user to change some variables(such as database credentials) in the .env file using the web backend system. But how do I save the changes?
In case you are still wondering what all this means, well, you are probably new to the . env file. It's actually a simple configuration text file that is used to define some variables you want to pass into your application's environment. This file needs a something like a parser to make it work.
There is no built in way to do that. If you really want to change the contents of the .env
file, you'll have to use some kind of string replace in combination with PHP's file writing methods. For some inspiration, you should take a look at the key:generate
command: KeyGenerateCommand.php:
$path = base_path('.env'); if (file_exists($path)) { file_put_contents($path, str_replace( 'APP_KEY='.$this->laravel['config']['app.key'], 'APP_KEY='.$key, file_get_contents($path) )); }
After the file path is built and the existence is checked, the command simply replaces APP_KEY=[current app key]
with APP_KEY=[new app key]
. You should be able to do the same string replacement with other variables.
Last but not least I just wanted to say that it might isn't the best idea to let users change the .env file. For most custom settings I would recommend storing them in the database, however this is obviously a problem if the setting itself is necessary to connect to the database.
Yet another implementation, in case you have something like:
A = B #this is a valid entry
In your .env file
public function updateEnv($data = array()) { if (!count($data)) { return; } $pattern = '/([^\=]*)\=[^\n]*/'; $envFile = base_path() . '/.env'; $lines = file($envFile); $newLines = []; foreach ($lines as $line) { preg_match($pattern, $line, $matches); if (!count($matches)) { $newLines[] = $line; continue; } if (!key_exists(trim($matches[1]), $data)) { $newLines[] = $line; continue; } $line = trim($matches[1]) . "={$data[trim($matches[1])]}\n"; $newLines[] = $line; } $newContent = implode('', $newLines); file_put_contents($envFile, $newContent); }
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