ajax url database - remote server

[Gloak]

Hi there. Still a newbie question...
a) I tested my code at localhost (my computer) and ALL was good. Now I uploaded my files to remote site and I can't get my page to work. There is an Ajax call to database. Do I need to change the URL in the ajax? Now it's something like php/file.php. Then there is the json file and the config (username, password, etc). The config file is different with the new user name, etc.

b) while develing my page, I could use firebug, etc and get the error (no such file, no such picture, etc). Is there a way to do the same with the remote site?

Thank you so much!

[pritaeas]

Yes, the same tools also work on a remote website. Also check your server's error logs (in case of PHP errors).

[Gloak]

Pardon for my ignorance, how do I do that?
I am using bluehost and just quit 1and1 for this current matter.

[pritaeas]

If there is an error in PHP, there should be an error_log created in that folder.

[Gloak]

Thanks for your input. There was no error while developing the web page (my localhost). The error just came up when I needed to change the Ajax url and the config doc. It must be there. I will ask them about this error-log tomorrow morning.... UPDATE. I think I found it here.

[Gloak]

UPDATE 2. I found it. Please bear with me as I learn how to do this. There are basically two kinds of messages.
The database has just one entry for test now.
a)

Thu Jul 25 19:00:28 2013

Query_time: 6.085445 Lock_time: 0.000127 Rows_sent: 1 Rows_examined: 1

SET timestamp=1374800428;
SHOW DATABASES

Thu Jul 25 19:00:35 2013

Query_time: 7.304551 Lock_time: 0.002517 Rows_sent: 1 Rows_examined: 550

SET timestamp=1374800435;
SELECT COUNT(*) FROM information_schema.COLUMNS

Thu Jul 25 19:01:00 2013

Query_time: 25.135463 Lock_time: 0.000063

It goes on for several lines with info like that.

b)
The other is very concise.

Thu Jul 25 21:02:49 2013

Query_time: 5.379344 Lock_time: 0.000104 Rows_sent: 2 Rows_examined: 2

SET timestamp=1374807769;
SHOW DATABASES

In the console (firebug, chrome, etc) I would find things like this: file does not exist, etc. Does the above show that it's reaching the right database? Since I never saw the right one, I don't undertand the above or the difference. It seems that it's not reading anything.
Thank you for your time.

[pritaeas]

Find out where the "file does not exist" comes from.

The rest is just database logging, what looks to me from something like PhpMyAdmin.

[Gloak]

I mean, while I was building the web page, firebug would say: picture not found. Etc. Now all is good. Now there is no message, all should be working. No message anymore in my console / localhost.