$envPaths = [
    __DIR__ . '/.env',          // Cas : fichier dans WEB
    __DIR__ . '/../.env',       // Cas : fichier dans WEB/crm
    __DIR__ . '/../../.env',    // Cas : fichier dans WEB/crm/config
];

$envLoaded = false;

foreach ($envPaths as $path) {
    if (file_exists($path)) {
        $dotenv = Dotenv\Dotenv::createImmutable(dirname($path));
        $dotenv->load();
        $envLoaded = true;
        break;
    }
}

if (!$envLoaded) {
    die("Fichier .env introuvable");
}
try {

    $pdo = new PDO(
        sprintf(
            'mysql:host=%s;port=%s;dbname=%s;charset=utf8mb4',
            $_ENV['DB_HOST'],
            $_ENV['DB_PORT'],
            $_ENV['DB_NAME']
        ),
        $_ENV['DB_USER'],
        $_ENV['DB_PASS']
    );

    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

} catch (PDOException $e) {

    die("Erreur connexion BDD : " . $e->getMessage());

}
<br />
<b>Fatal error</b>:  Uncaught PDOException: could not find driver in /var/www/webitech/WEB/blog/api/bootstrap.php:58
Stack trace:
#0 /var/www/webitech/WEB/blog/api/bootstrap.php(58): PDO-&gt;__construct()
#1 /var/www/webitech/WEB/blog/index.php(10): get_pdo()
#2 {main}
  thrown in <b>/var/www/webitech/WEB/blog/api/bootstrap.php</b> on line <b>58</b><br />