PHP uses recursive calculation of folder size _php instance

The method is very simple, here is no more nonsense, directly to the code:

Copy Code code as follows:

protected function Dir_size ($dir) {
$DH = Opendir ($dir); Open Directory, return a directory stream
$size = 0; Initial size is 0
while (false!== ($file = @readdir ($DH)) {//loop-read files in directory
if ($file!= '. ' and $file!= ' ... ') {
$path = $dir. '/'. $file; Setting up a directory for cases that contain subdirectories
if (Is_dir ($path)) {
$size + + $this->dir_size ($path); recursive invocation, calculating directory size
}elseif (Is_file ($path)) {
$size + + filesize ($path); Calculate File Size
}
}
}
Closedir ($DH); Close Directory Flow
return $size; return size
}