There are number of firefox add-on every webdeveloper love, in which one of the best add-on is firbug.
Fire bug let's you debug your javascript, html, css code. Thinking even more it' can debug PHP also using FirePHP. It include debugger, error consol and commandline.
After you install firebug add-on you will see a 'firebug'
in statusbar of firefox .Click on that bug firebug in open for you at bottom of your page.
If you bored using javascript alery(myVar); function for debugging you may use console.log(myVar); like console on most development tools.
Also firbug helps you to inspect each every corner of DOM using your mouse.
Debugging PHP using Firebug, FirePHP
First you need to install firebug add-on then firePHP add-on. Then download FirePHPCore from
http://www.firephp.org/ and add FirePHPCore in your PHP 'include' or root or somewhere you like. Include it in you PHP file.
using
require('FirePHPCore/fb.php');
and call fb() function passing a single argument that you need to pass in to Console
try{
echo "hello";
}
(Exception $e) {
fb($e);
fb("Error in data ".$foo);
}
FirePHP writes this to console using HTTP headers – in particular, X-FirePHP-Data headers in the response.
So you need to use ob_start();
This will initialise output buffering, so that any HTML you output is held up till the end of script execution.
Referances
More about Firebug and FirePHP
You can get Firbug Add-on from here
http://getfirebug.com/enable
FirePHP Project
http://www.firephp.org/
