How to view syntax code errors in firefox

When coding in php if I made a coding error I used to get the error details in the ff window - now I do not see that and can not find anywhere to view the errors.
I have now written a small bit of php with the wrong table name - I used to get a message "table not found" but now all I get is a blank page.
The only error message I have seen is "cannot connect to the mySQ server"
I have looked around in Web Console and plugins and downloads, searched the net and this site but can not find the answer - and I am sure it will be a simple thing.
(php is set to show errors)
I am using FF 24.0
Could someone kindly tell me what I am missing? *LOL*
thank you for your time.

@emotn its the php that is supposed to show the errors, FF can only format the output, i think all things are fine in the code if not the php execution will stop.
If you use, wrong table name you will not get errors try to echo the query and try it in phpmyadmin

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