Firebug
is a phenomenally helpful HTML / CSS / JavaScript / Ajax debugger. Be that as it may,
did you know it can likewise be utilized to troubleshoot PHP? Yes, on account
of an additional Firefox extension called FirePHP. By
consolidating this expansion, which sits on top of Firebug, with a server-side
library, your PHP scripts will have the capacity to send troubleshooting data
to the program, helpfully encoded in the HTTP reaction headers. Once you're set
up, you can log notices and slips in your PHP scripts to the Firebug reassure,
pretty much as though you were creating JavaScript.
To
begin, you initially need to introduce the FirePHP extension from Mozilla's
Firefox Add-ons site. This obliges that you as of now have Firebug introduced.
When FirePHP is introduced, when you next open your Firebug board, you'll now
see an extra blue bug. Click on that bug and a menu will seem permitting you to
empower or incapacitate FirePHP:
This,
obviously, won't do anything yet. You likewise need to introduce the FirePHP
server-side library, which is accessible here. This is a stand-alone form of
the library that can either be downloaded physically or introduced utilizing
PEAR. After that, you basically need to incorporate the library in your code.
There are likewise forms intended to coordinate with different structures or
substance administration frameworks, for example, the WP-FirePHP plugin for
WordPress or the JFirePHP plugin for Joomla. For the purpose of this stroll
through, I'll concentrate on the stand-alone usefulness.
When
you have the FirePHP library on your server, you have to incorporate it in your
script with a line like:
require_once('FirePHPCore/fb.php');
Since
FirePHP sends its logging information by means of the HTTP headers, you'll have
to cradle your script's yield so that the reaction headers can incorporate
substance produced further down the script. In PHP, this is expert by calling ob_start close to the highest point of
your script:
ob_start();
With
these steps done, you can begin utilizing FirePHP. You should do nothing more
than call the fb function with whatever you'd like to log, alongside a
discretionary name and a discretionary steady to characterize the message as a
standard log, a notice, a mistake, or data. For example:
$var
= array('a'=>'pizza', 'b'=>'cookies', 'c'=>'celery');
fb($var);
fb($var,
"An array");
fb($var,
FirePHP::WARN);
fb($var,
FirePHP::INFO);
fb($var,
'An array with an Error type', FirePHP::ERROR);
This
code will produce the following output in the Firebug console:
You
can likewise utilize FirePHP to give you a hint of your application's
execution: by going in the FirePHP::TRACE consistent, you'll get the
opportunity to see the line number, class name, and capacity name from inside
which fb was called. So this code:
function
hello() {
fb('Hello World!', FirePHP::TRACE);
}
function
greet() {
hello();
}
greet();
Will
produce an output as follows:
This follow usefulness can be fabulous for troubleshooting
more included scripts, as it tells you precisely from where your capacities are
being called
Obviously, you have to recall to uproot you're
troubleshooting explanations before your code goes live!
There's a ton more to FirePHP than what I've covered here.
I've been demonstrating to you the disentangled procedural API for FirePHP,
however there's a more propelled article situated API accessible with various
extra elements. You can realize about it on the FirePHP site, so make sure to
look at it.
Source: FirePHP