Opens up a directory handle to be used in subsequent closedir, readdir, and rewinddir calls.
The directory path that is to be opened
For a description of the context parameter, refer to the streams section of the manual.
Returns a directory handle resource on success, or false on failure
Exceptions and Errors
Upon failure, an E_WARNING is emitted.
This may happen if directory is not a valid directory, the directory can not be opened due to permission restrictions, or due to filesystem errors.
|context is now nullable.