Although this page provide detail coverage on FirePHP, it mainly focus on integrating with Code Igniter, PHP4 MVC framework used for Central2. All setup and examples usage are also in PHP4.

• Download FirePHP Core Library and find FirePHP.class.php4 file
• Add a new setting in configuration file (config.php)

$config['fire_php_enabled'] = true;

• Create a new folder in Code Igniter Library folder: firephp-[VERSION_NUMBER] and have following files in this folder
  • firephp.php : rename of FirePHP.class.php4
  • firephp_fake.php : FirePHP_FAKE class file with all attributes and properties but no implementation
  • fireigniter.php : a communicator class used by controller. This class help controller determine to load firephp.php or firephp_fake.php depends on configuration setting.

class fireigniter
{
    /**
    * Constructor
    */
    function fireigniter()
    {
        //-- Load CodeIgniter Resources
        $CI =& get_instance();

        //-- Check Configuration
        if ($CI->config->item('fire_php_enabled') == true)
        {
            //-- Load FirePHP
            $CI->load->library('firephp-0.3.1/firephp');
        }
        else
        {
            //-- Load Fake FirePHP, an empty class and name instance 'firephp' instead of 'firephp_fake'
            $CI->load->library('firephp-0.3.1/firephp_fake', 'firephp');
        }
    }
}//END class

• May require output buffering either
  • switch on in php.ini (as mentioned in http://activecodeline.com/setting-up-firephp-with-codeigniter/ http://www.firephp.org/HQ/Learn.htm)

You are almost done. Now you need to be sure that PHP’s output buffering setting is turned on. I use WAMP package so turning this option on means clicking on WAMP icon in tray area, then selecting PHP > PHP Settings > Output buffering

• or use inline command

ob_start();

• Ensure Firebug ‘Net’ and ‘Console’ panels are enabled.

$this->firephp->log($message, $label); //.. or
$this->firephp->fb($message, $label, FirePHP_LOG);

$this->firephp->info($message, $label); //.. or
$this->firephp->fb($message, $label, FirePHP_INFO);

$this->firephp->warn($message, $label); //.. or
$this->firephp->fb($message, $label, FirePHP_WARN);

$this->firephp->error($message, $label); //.. or
$this->firephp->fb($message, $label, FirePHP_ERROR);

$this->firephp->fb($variable, $key);

$table   = array();
$table[] = array('Col 1 Heading','Col 2 Heading');
$table[] = array('Row 1 Col 1','Row 1 Col 2');
$table[] = array('Row 2 Col 1','Row 2 Col 2');
$table[] = array('Row 3 Col 1','Row 3 Col 2');

$this->firephp->table($label, $table); //.. or
$this->firephp->fb($table, $label, FirePHP_TABLE);

$this->firephp->trace($message, $label); //.. or
$this->firephp->fb($message, $label, FirePHP_TRACE);

$this->firephp->dump($key, $variable); //.. or
$this->firephp->fb($variable, $key, FirePHP_DUMP);

class welcome extends Controller
{
	function Welcome()
	{
		parent::Controller();
        $this->load->library('firephp-0.3.1/fireigniter');
	}

	function index()
	{
        $this->firephp->fb("entering 'index' function", FirePHP_INFO);

        $var = $this->config;
        $this->firephp->fb($var, 'Current Configuration', FirePHP_INFO);

        $number = rand();
        $this->firephp->fb($number, 'Random Generated Number', FirePHP_INFO);
        echo 'Random Number is: '.$number;

        if($number % 2 == 0)
        {
            $this->firephp->fb($number, '$number before double_it()', FirePHP_INFO);
            $number = $this->double_it($number);
            $this->firephp->fb($number, '$number after double_it()', FirePHP_INFO);
        }
        else
        {
            $this->firephp->warn("Odd random number detected.");
        }

        if($number > 20000)
        {
            $this->firephp->error("Number is greater than 20000. Function terminated.");
            $this->firephp->fb($number, 'Number', FirePHP_ERROR);
            return;
        }

        echo '<br>';
        echo 'Output Number is: '.$number;
        $this->firephp->info("reaching to the end of 'index' function");
        return $number;
	}

    function double_it($n)
    {
        $output = $n * 2;
        $message = "$n x 2 = $output";
        $this->firephp->fb($message, FirePHP_LOG);
		return $output;
    }
}

Route 1: Random Number is Even and result is smaller than 20,000

Route 2: Random Number is Even and result is bigger than 20,000

Route 3: Random Number is Odd and result is smaller than 20,000

Route 4: Random Number is Odd and result is bigger than 20,000