PhpBrew\Config::putPathEnvFor PHP Method

    public static function putPathEnvFor($buildName)
    {
        $root = self::getRoot();
        $buildDir = $root . DIRECTORY_SEPARATOR . 'php' . DIRECTORY_SEPARATOR . $buildName;
        // re-build path
        $paths = explode(PATH_SEPARATOR, getenv('PATH'));
        $paths = array_filter($paths, function ($p) use($root) {
            return strpos($p, $root) === false;
        });
        array_unshift($paths, $buildDir . DIRECTORY_SEPARATOR . 'bin');
        putenv('PATH=' . implode(PATH_SEPARATOR, $paths));
    }