evaluate home tilde 7e in php

1function expand_tilde($path)
2{
3    if (function_exists('posix_getuid') && strpos($path, '~') !== false) {
4        $info = posix_getpwuid(posix_getuid());
5        $path = str_replace('~', $info['dir'], $path);
6    }
7
8    return $path;
9}
10