Debugging PHP scripts in Eclipse

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Published on Monday, 10 March 2008 00:00

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Debugger are full-featured PHP debugger engine. They are interactive tools that allows
you to debug PHP scripts locally or remotely, from an IDE or from the console. There is 3
debugger on the market, XDEBUG (open source) , ZEND (closed source), DBG (commercial
but source code available) by luck all are free :-)

Debugger Extension can be downloaded from Zend Downloads

Zend debugger in Eclipse also works for MySQL statements!

Installing ZEND debugger in Eclipse

The Zend Executable Debugger Eclipse plugin adds PHP debugging capabilities to the Eclipse environment.

Add the following remote location to the eclipse manager, even if you have eclipse PDT

http://downloads.zend.com/pdt

ZEND debugging mysql statement

You'll have to configured the PHP binary included with the ZEND debugger to be able to debug SQL queries. Search for a PHP.ini in your eclipse/plugins directory, you'll find 2 files.

Ex:

• E:\eclipse\bin\PDT\plugins\org.zend.php.debug.debugger.win32.x86_5.2.12.v20071210\resources\php4\php.ini
• E:\eclipse\bin\PDT\plugins\org.zend.php.debug.debugger.win32.x86_5.2.12.v20071210\resources\php5\php.ini

And add these line in one of these files according to your PHP version

extension_dir = "xampp_path/php/ext"
extension="xampp_path/php/ext/php_mysql.dll"
extension="xampp_path/php/ext/php_mysqli.dll"
include_path =".;xampp_path/php;"

Installing Zend debugger server in XAMPP

Please note that the Zend Executable Debugger is not available from the Eclipse PDT update Manager, so download ZEND debugger (Free) from Zend Downloads, you must extract the zip ZendDebugger-5.2.12-cygwin_nt-i386.zip.

In the zip file, you'll see multiple directories

Use the version that match the one in XAMPP (you have note at chapter A, for me 5.2.3 so copy files from 5_2_x_comp) and copy the dll in
xampp_path\php\extensions\

Open the file php.ini located at xampp_path\apache\bin\php.ini
and add these keys if they do not already exist:

[XDebug]
;; Only Zend OR (!) XDebug
;zend_extension_ts="\xampp\php\ext\php_xdebug.dll"
zend_extension_ts="\xampp\php\extensions\ZendDebugger.dll"
zend_debugger.allow_hosts=127.0.0.1
zend_debugger.expose_remotely=always

; this is to see output while debugging
implicit_flush = On 

Switch off all other debugger as it may conflict with Zen

eaccelerator.enable="0"

;extension=dbg.dll

:extension=xdebug.dll

Restart apache, check for proper operations by going to http://localhost

Debugging PHP in Eclipse PDT

Go to Debug dialog for creating and managing run configurations

• Choose as Server Debugger: Zend Debugger
   
• Choose as PHP Server: XAMPP
• File should point to the root of your Joomla! installation ex: /PROD2/index.php because in XAMPP htdocs directory I have a subdirectory /PROD2 with Joomla! 1.5 inside
• Remove the option Break at First Line
• Keep URL to Auto Generate

As seen in the screen shot below

Now click on button configure

• Give a Name, not important here, lets keep XAMPP
• Enter the root URL that points to the document root of this server, for me it is http://localhost/PROD2

Go to tab "Path Mapping"

• As Path on server enter E:\xampp\htdocs\PROD2
• Choose Path in Workspace /PROD2

Confirm all windows, and you can now start the debugger by clinking on debug button

You're done, you can now set breakpoint and debug Joomla! or your code easily

Installing Joomla in Eclipse

Attention: the root workspace must be located at xampp_path/htdocs

Setting Zend Debugger in Eclipse PDT for Joomla!

In the PHP perspective of eclipse, go to the menu debug

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