( string url )
This function parses a URL and returns an associative array containing any
of the various components of the URL that are present.
This function is not meant to validate
the given URL, it only breaks it up into the above listed parts. Partial
URLs are also accepted, parse_url() tries its best to
parse them correctly.
On seriously malformed URLs, parse_url() may return
FALSE and emit a E_WARNING. Otherwise an associative
array is returned, whose components may be (at least one):