PHP – get the size of a directory

Question

What is the best way to get the size of a directory in PHP? I'm looking for a lightweight way to do this since the directories I'll use this for are pretty huge.

There already was a question about this on SO, but it's three years old and the solutions are outdated.(Nowadays fopen is disabled for security reasons.)

Answer 1

Is the RecursiveDirectoryIterator available to you?

$bytes = 0;
$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir));
foreach ($iterator as $i) 
{
  $bytes += $i->getSize();
}