Updating mysql to mysqli

Hello Ray
I am having a problem updating a thank you page.
I am attaching the code.
Can you see where I am wrong please?
The error messages are as follows
Warning: mysqli_select_db() expects parameter 1 to be mysqli, string given in C:\xampp\htdocs\boatsforsalenow_mysqli\Enquiries\thank_you.php on line 34

Warning: mysqli_query() expects parameter 1 to be mysqli, string given in C:\xampp\htdocs\boatsforsalenow_mysqli\Enquiries\thank_you.php on line 36

Warning: mysqli_error() expects exactly 1 parameter, 0 given in C:\xampp\htdocs\boatsforsalenow_mysqli\Enquiries\thank_you.php on line 36
Many thanks
John

You can't simply manually update mysql_ to mysqli_ on a page and update to mysqli.

You will need to redo the page and connection to use the correct mysqli syntax. Data Bridge v2 has a update utility that will help you do this. You could also re-create the page manually with MySQLi Server Behaviors. You should not attempt to do the update by hand if you aren't familiar with writing php and mysqli.

Thanks for that information Ray.
How can I find the helpful utility you mention?

Those are both extensions available for purchase from the webassist.com web site in the "Dreamweaver Extensions" section.