This link can help you
https://www.w3schools.com/php/func_mysqli_error.aspPHP mysqli_error() Function
You can solve your any coding problems from this site
Select the text that you want to make a link
On the toolbar of the Text & Images module, click the icon .
In the Open link in menu, select where you want to open the target page. ...
In the Title box, type the description that should appear when users place the mouse pointer over the link.
The best way to create a website is that to make custom website mean you may create a website as whole coding of html,css and php. And if you asked me about website builder then i suggest you the wordpress. This is the best website builder and this is use in whole world. So,you should use...