parse_url

{parse_url url="http://username:password@hostname/path?arg=value#anchor" assign="parsed_url"}
vrací:
$parsed_url = Array
(
    [scheme] => http
    [host] => hostname
    [user] => username
    [pass] => password
    [path] => /path
    [query] => arg=value
    [fragment] => anchor
)