How x debug restored partial sanity to the insane
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How x debug restored partial sanity to the insane
- 1. How XDebugrestored partial sanity to the insane world of PHP
- 2. In the beginning ……. Echo Print
- 3. In the beginning ……. var_dump print_r
- 5. In the beginning …….
- 6. In the beginning …….
- 7. In the beginning …….
- 8. In the beginning …….
- 9. In the beginning …….
- 10. In the beginning …….
- 11. Installation and Setup http://www.xdebug.org/find-binary.php
- 14. How to use break points XDEBUG_SESSION_START=true
- 18. Features
- 19. Features
- 20. Features
- 21. Thank You References: http://www.xdebug.org http://www.eclipse.org Images: xDebug Logo: http://www.xdebug.org/images/xdebug-logo.png Eclipse Logo: http://www.eclipse.org PHP Logo: http://www.php.net Print Icon: http://icons.iconarchive.com/icons/mart/glaze/128/printer-1-icon.png Sound Wave: http://docstore.mik.ua/orelly/web2/audio/figs/aud.0210.g
Editor's Notes
- There was echo and print And it was good
- Then came print_r & var_dumpAnd it was good
- Then a horrible evil came upon the world..
- Magento forces MVC and EAV. Configuration is a mix between DB, config files and code. Objects use magic methods __get __call __set etc.Lazy Loading and CachingPoor documentation on the set up.Oh yea the singletons, collections and helpers make a fine mess when trying to do something.
- I was going to paste in a full print_r or var_dump of one of the objectsBut one of the simplest objects took about 20 slides So as you can see usingprint_r and var_dump will be troublesome since you have to send all this data over http to the browser to look at it.
- What was I to do?How can I go on and make changes in Magento ?How the hell did others make wonderful extensions and plugins ?
- xDebug provided the solutionYou can set break pointsget stack tracesview data and objects as they are being instantiated
- Now I was able to get to work coding and making the boss happy which made me happy
- Gotohttp://www.xdebug.org/find-binary.phpPaste in the output of : php -iDownload the binary suggestedInstall the binary as a zend_extensionMake sure you have a php.iniDerickRethans offers a suggestion on the page as wellphp –i >> info.txtremote_enable: Starts a remote session when flag calledremote_host: sets the host name remote_port: 9000 by default change for firewallremote_handler: dbgp (debugging protocol)
- Eclipse is a little more complicated Before you start: Make sure all files your code can touch is located in projects or is referenced in the include pathsNote: Break at 1st line needs eclipse to restart to take effect
- Use Multi session to on Accept Remote Session JIT (Just In Time)
- Just Double click on the line you want to break You can also right click and select toggle break pointOpen the browser Pass in XDEBUG_SESSION_START=true in the URL (Switch to eclipse )
- Debug Tab: Controls stepping and displays current stack traceF5 – StepF6 – Step over (skips over a function call)F7 – Step Return When in a function will continue to the return statementF8 – Resume to next breakpointPHP stores the stack in strange ways (too much to explain in class) which is why you will see the stack as a tree
- Variables Tab, Lists all variables, the current state and there value (Cannot change values of variables here)
- Breakpoints TabAllow you to toggle breakpoints on and off Can set the condition for the variable to allow you to change values Step filters are not implemented
- Improved Error Out putting
- Profiling (cache grind)
- Code Coverage (PHP Unit)
- Thanks!!!