PHP getenv always returns false

Question

The getenv() always returns false. I am using Symfony dotenv library and loading my variables from a .env file in the root of my project.

Answer 1

I m not using symfony but i've encountered the some problem i am using the vlucas library this is my first code that caused the problem

define('BASE_PATH',realpath(__DIR__.'/../../'));
require_once __DIR__.'/../../vendor/autoload.php';
$dotEnv = Dotenv\Dotenv::createImmutable(BASE_PATH);
$dotEnv->load();
$appName=$_ENV['APP_NAME'];
$appName2=getenv('APP_NAME'];

var_dump($appName) // return "This is my website";
var_dump($appName2) // return false;

i didn't knwo the problem at first but it seems that it was because putenv() and getenv() are not thread safe

so i changed it to this code

define('BASE_PATH',realpath(__DIR__.'/../../'));
require_once __DIR__.'/../../vendor/autoload.php';
$dotEnv = Dotenv\Dotenv::createUnsafeImmutable(BASE_PATH);// <======== :) look here
$dotEnv->load();
$appName=$_ENV['APP_NAME'];
$appName2=getenv('APP_NAME'];

var_dump($appName) // return "This is my website";
var_dump($appName2) // return "This is my website";

i hope this resolves your issue