如何执行像sed -i'/^MAIL_DRIVER=/s/=.*/=log/'.env之类的东西，使用PHP来更新laravel dotenv文件中的变量值

Question

In Laravel sometime I uptade environment values with sed with:

sed -i '/^MAIL_DRIVER=/s/=.*/=log/' .env

Can anyone propose and alternative to do this with PHP?

UPDATE: I used Laravel/dotenv .env file as a example to give some context to the question but I'm not interested in how to change enviroment variables programatically my interest is how to perform sed "like" operations with php file manipulation function or if exists some library to do that. I also know i could use system o passthru functions, that's what I'm already doing I just curios about how to manipulate files in this way using PHP

Answer 1

You don't need a system call to do achieve this. You should use putenv()

putenv('MAIL_DRIVER=/log');

Answer 2

While Laravel uses the dotenv library to read, it offers no way to programatically update the .env file. You can however update the configuration value using preg_replace . Here's a one line solution:

file_put_contents(base_path('.env'), preg_replace("/(MAIL_DRIVER)=(.*)/", "$1=log", file_get_contents(base_path('.env'))));

Here's also the solution expanded into multiple lines and explained:

// Read the .env file contents
$env = file_get_contents(base_path('.env'));

// Replace the value using regex matching
$env = preg_replace("/(MAIL_DRIVER)=(.*)/", "$1=log", $env);

// Write the updated contents to the file
file_put_contents(base_path('.env'), $env);