config.php

<?php
/**
 * @param string $index
 * @return string
 */
function config(string $index) : string
{
    $envPath = getcwd() . "/.env";
    if(file_exists($envPath)){
        $index = str_replace('_', '\\_', $index);
        $envFile = file_get_contents($envPath);
        preg_match("/" . $index . '=(.*?)\n/', $envFile, $matches);
        $value = $matches[count($matches) - 1];
        $value = preg_replace('/[^A-Za-z0-9\-]/', '', $value);
        return $value;
    } else {
        return "";
    }
}