Update settings in dotenv file

saveToEnvFile.php

<?php

function saveToEnvFile(string $dotEnv, string $pattern, string $label, ?string $value): bool
{
    $readFrom = fopen($dotEnv, 'r');
    $writeTo = tmpfile();

    $isDirty = false;
    while (!feof($readFrom)) {
        $line = fgets($readFrom);
        $setting = "{$label}=\"{$value}\"";

        $newLine = preg_replace($pattern, $setting, $line);
        if ($newLine != $line) {
            $isDirty = true;
        }
        fputs($writeTo, $newLine);
    }

    $tmpDotEnv = stream_get_meta_data($writeTo)['uri'];
    if ($isDirty) {
        rename($tmpDotEnv, $dotEnv);
    } else {
        unlink($tmpDotEnv);
    }

    fclose($readFrom);
    fclose($writeTo);

    return $isDirty;
}

$dotEnv = '/var/www/example/.env';
$pattern = "/^{$label}=[\"']?.*/";
$label = 'APP_URL';
$value = 'https://example.local';

$isDirty = saveToEnvFile($dotEnv, $pattern, $label, $value);