$CGI->url() : https://kimurashuuichi.com/programming/perl/memo/programming_thisfilename_module/index.cgi<br>
$CGI->url(-relative, 1) : index.cgi<br>
$CGI->url(-absolute, 1) : /programming/perl/memo/programming_thisfilename_module/index.cgi<br>
$CGI->url(-base , 1) : https://kimurashuuichi.com<br>
$CGI->url(-full, 1) : https://kimurashuuichi.com/programming/perl/memo/programming_thisfilename_module/index.cgi<br>
$CGI->url(-path_info, 1) : https://kimurashuuichi.com/programming/perl/memo/programming_thisfilename_module/index.cgi<br>
$CGI->url(-path_info, 1,-query, 1) : https://kimurashuuichi.com/programming/perl/memo/programming_thisfilename_module/index.cgi?keywords=parameter<br>