system/HTTP/URI.php
public function setAuthority(string $str)
	{
		$parts = parse_url($str);

		if (empty($parts['host']) && ! empty($parts['path']))
		{
			$parts['host'] = $parts['path'];
			unset($parts['path']);
		}

		$this->applyParts($parts);

		return $this;
	}
public function setAuthority(string $str)
	{
		$parts = parse_url($str);

		if (empty($parts['host']) && ! empty($parts['path']))
		{
			$parts['host'] = $parts['path'];
			unset($parts['path']);
		}

		$this->applyParts($parts);

		return $this;
	}
Parses the given string an saves the appropriate authority pieces.

@param string $str

@return $this