find_my_environment.php

<?php

$dir = __DIR__; // Start in our current directory
$envFile = '_ss_environment.php';

while ($dir) {
        if (is_readable($dir)) {
                if (file_exists($dir . $envFile)) {
                        require $dir . $envFile;
                        break;
                }
        }

        $dir = substr($dir, 0, strrpos($dir, '/'));
}