> For the complete documentation index, see [llms.txt](https://xoops.gitbook.io/xoops-2-5-x-debugging-with-firephp-firebug/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xoops.gitbook.io/xoops-2-5-x-debugging-with-firephp-firebug/php-debugging-without-xoops.md).
# PHP Debugging without XOOPS
## 3.1 History
Frankblack was frustrated with debugging his AJAX applications using just the standard Debug Mode, therefore he ended up using FireBug + FirePHP as addons for Firefox, and he rewrote XOOPS class/logger/render.php to output the XOOPS debug messages to FirePHP, resulting in a very flexible solution. Trabis contributed as well, and now we have a solution that is very helpful to XOOPS Developers.
## 3.2 Installation
Important – you have to have Firefox to use Firebug and FirePHP! Recommended: Ver. 4.0
There are few simple steps to get you going:
1. Download and install in Firefox the newest version of Firebug (currently 1.7) from here:
2. Download and install in Firefox the latest version of FirePHP extension:
3. Download and install the FireDebug 1.6 for XOOPS 2.5.x
4. Go to xoops\_data/configs/xoopsconfig.php and change the DebugLogger configuration to:
```php
/**#@+
* Debug logger for XOOPS
*
* Choose logger to use
* - legacy
* - pqp
* - firephp
*
*/
"debugLogger" => firephp,
/**#@-*/
```
and you’re ready to go.
## 3.3 Using FirePHP/Firebug with XOOPS
After installing the above tools, you can add this line your PHP file:
```php
require_once XOOPS_ROOT_PATH.'/class/logger/firephp/FirePHPCore/fb.php';
```
and you can start sending messages to FirePHP:
```php
FB::log('Log message');
FB::info('Info message');
FB::warn('Warn message');
FB::error('Error message');
FB::trace('Trace message');
```
**Figure 7: Firebug with FirePHP and XOOPS debug messages**
The messages from XOOPS are coming from XOOPS Debug, but XOOPS just redirects them to Firebug, so you have all debug messages conveniently in one location.
**Figure 8: XOOPS Debug messages in XOOPS**
**Figure 9: XOOPS Debug messages in Firebug**
Additional advantage is that you also have Smarty Debug Output as well – all in one location. When we want to see values of variables, we can send it as well, e.g.
```php
FB::log($index_admin,'this is our ModuleAdmin class');
```
This will show in Firebug as:
Since there is more information than the line can hold, we can just click on that line and a new window will open with all the details:
**Figure 10: Firebug with detailed FirePHP variable info**
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