Deletes filename. Similar to the Unix C unlink() function. Palauttaa TRUE onnistuessaan, muutoin FALSE.
Huomaa: As of PHP 5.0.0 unlink() can also be used with some URL wrappers. Refer to Liite J for a listing of which wrappers support unlink().
Huomaa: The context parameter was added as of PHP 5.0.0.
See also rmdir() for removing directories.