Php creates a _ php instance to determine whether the folder exists or not.

This article mainly introduces php to determine whether a folder exists and does not exist. This article provides the implementation code directly. For more information, see The Code is as follows:

Function mkdirs ($ dir, $ mode = 0777)
{
If (is_dir ($ dir) | @ mkdir ($ dir, $ mode) return TRUE;
If (! Mkdirs (dirname ($ dir), $ mode) return FALSE;
Return @ mkdir ($ dir, $ mode );
}
Mkdirs ("aa01 ");

The default mode is 0777, which means the maximum possible access. For more information about mode, see the chmod () page.