debug

• Cannot modify header information - headers already sent

  This warning message is produced by PHP if a program attempts to send an additional HTTP header after the separator (and hence all the headers) has already been sent. In the HTTP protocol a server response consists of a group of headers followed by a body, separated by a single blank line (i.e. a line containing only a carriage-return).

• Debugging a translation

  You just finished a development of a new component/module/plugin, which has multilanguage support, or just finished a translation of such a Joomla addon and want to doublecheck the result, and don't know how to do it? Don't look further, Joomla supports some useful debugging mechanisms that can make it easier to locate untranslated strings and diagnose problems with language translations in installed extensions.

• Debugging your own code

  If your read this, then you might have playing with some code already - and as you know, nobody is perfect... all we make mistakes. But how you can find yours?

• How to turn your error reporting level to maximum?

  Anyone who maintained/developed something with or for Joomla, or needed to troubleshoot something on a misbehaving Joomla site knows the feeling: something does not working, and the available error messages aren't showing enough information to help you track down the root of the issue.

  Any extra bit of info can help, so here is a tip for Joomla 1.7 which might help you got that.

• Joomla Updates component and/or Joomla Updatesites 1064 error

  I am working on update a Joomla 3.10.12 site to Joomla 4.*, and have run into a weird issue. Joomla Updates component  gives me a cryptic error 1064 without any other explanation, and switching up Joomla debug system and enabling maximum error reporting - your best bet in these cases - does not help in shredding some light on what could be wrong here.

  Your next bet, obviously might be to go to Manage>Database and click the Fix button on the top - this usually help you eliminate database related errors. Nothing this time.

• K2 - Error decoding JSON data

  After updating K2 to version 3.6.3, in the backend, when tried to edit one of items, I got this error:

  Error decoding JSON data: Syntax error.

• XML Parsing Error at. Error

  After moving a site to a new server I found this error in the backend - at least one error per page, but casually even more.

  XML Parsing Error at. Error

  No error number, no line number... What a heck!