Refactor if-else php code

Sorry, noob question. What's the best way to refactor this?

if (is_dir('temp'))
{
  ===== do action A =====
}
else
{
  mkdir("/path/to/my/dir", 0755);
  ===== do action A开发者_StackOverflow中文版 =====
}

Thanks.

if (!is_dir('temp'))
{
   mkdir("/path/to/my/dir", 0755);
}
===== do action A =====

What about:

if (!is_dir('temp'))
{
    mkdir("/path/to/my/dir", 0755);
}
===== do action A =====

Personally, I use this 'shorthand' for if blocks that only contain one line of code.

if(!is_dir('temp'))
    mkdir("/path/to/my/dir", 0755);

if(!is_dir('temp')){ mkdir("/path/to/my/dir", 0755); }

===== do action A =====