\nIPv6: " . $ipv6 . "
\n"; // URL regular expressions $pct_encoded = "%[\dA-F]{2}"; $unreserved = 'a-z0-9\-._~'; $sub_delims = '!$&\'()*+,;='; $pchar = "(?:[$unreserved$sub_delims:@|]+|$pct_encoded)"; // rfc: no "|" $scheme = '[a-z][a-z\d+\-.]*'; $reg_name = "(?:[$unreserved$sub_delims:@|]+|$pct_encoded)+"; // rfc: * instead of + and no "|" and no "@" and no ":" (included instead of userinfo) //$userinfo = "(?:(?:[$unreserved$sub_delims:]+|$pct_encoded))*"; $ipv4_simple = '[0-9.]+'; $ipv6_simple = '\[[a-z0-9.]+:[a-z0-9.]+:[a-z0-9.:]+\]'; $host = "(?:$reg_name|$ipv4_simple|$ipv6_simple)"; $port = '\d*'; //$authority = "(?:$userinfo@)?$host(?::$port)?"; $authority = "$host(?::$port)?"; $segment = "$pchar*"; $path_abempty = "(?:/$segment)*"; $hier_part = "/{2}$authority$path_abempty"; $query = "(?:[$unreserved$sub_delims:@/?|]+|$pct_encoded)*"; // pchar | "/" | "?", rfc: no "|" $fragment = $query; $url = "$scheme:$hier_part(?:\?$query)?(?:\#$fragment)?"; echo 'URL: ' . $url . "
\n"; // no scheme, shortened authority, but host has to start with www. $www_url = "www\.$reg_name(?::$port)?$path_abempty(?:\?$query)?(?:\#$fragment)?"; echo 'www.URL: ' . $www_url . "
\n"; // no schema and no authority $relative_url = "$segment$path_abempty(?:\?$query)?(?:\#$fragment)?"; echo 'relative URL: ' . $relative_url . "
\n"; ?>