Essential debugging php debugging techniques, tips & tricks

Oct 21, 20154 likes2,331 views

Debugging code is an essential task for every software developer. PHP is one of the most popular programming languages, but setting up debugging for PHP applications may be tricky. This session will demonstrate what debugging technologies and tools are available for PHP. How to debug CLI scripts, Web apps and REST services. What's the easiest way to set up debugging for the different server environments: local, remote, cloud or virtualized; in development or in production.

Essential Debugging
PHP Debugging techniques, tips & tricks
Kaloyan Raev
Zend / Rogue Wave

$ whoami
Zend Studio Team Lead
Eclipse Committer
Live in Sofia, Bulgaria
Skier

Why Debugging?
Because we make bugs
Because we want to fix them!

Debugging in PHP 101
echo $myvar;
var_dump ( $myvar );
die ( "Unexpected value in myvar: $myvar" );
error_reporting ( E_ALL );

PHP Debugger Engines
Xdebug
Zend Debugger
phpdbg

Xdebug Zend Debugger phpdbg
Built-in PHP ✅
Communication protocol
DBGp
XML-based
binary
PHP-specific
own
XML-based
Available in PHP 7 (as of today) ✅
IDE Support ✅ ✅
Remote Debugging ✅ ✅ ✅
Profiling ✅ ✅

The Easiest Way for Setting Up PHP with Debugger
Out of the box!
v8.5 provides both Xdebug and Zend Debugger

Essential debugging php debugging techniques, tips & tricks

Docker Containers
tommylau/xdebug - Apache + PHP + Xdebug
Tutorial: Debugging PHP Web Apps in a Docker Container

Just CLI Scripts
Zend Studio bundles PHP binaries with Zend Debugger included

No IDEs Please
phpdbg is for you
Built-in PHP since 5.6
as SAPI module
CLI user interface

Do It Yourself Stack
Instructions for Zend Debugger
Instructions for Xdebug
Instructions for phpdbg

Browser Toolbars
Xdebug
Zend Debugger
Browser
Toolbar
Debug
Engine
IDE
1. R
equest w
ith
debug
cookie
1. Request broadcast port
2.O
pen
debug
session
4.O
pen
debug
session
2. Response with debug info
3. R
equest

Xdebug Toolbars
Chrome
➢ Xdebug helper
➢ Xdebug enabler
Firefox
➢ The easiest Xdebug
➢ easy Xdebug
Opera
➢ Xdebug
➢ Xdebug launcher
Safari
➢ Xdebug Toggler

Zend Debugger Toolbars
Chrome
➢ zDebug
Firefox
➢ Zend Firefox Toolbar
Internet Explorer
➢ Zend Internet Explorer Toolbar

Remote Debugging
Intranet
Direct Internet Connection
Firewall / Proxy
➢ SSH Tunneling - works for both Xdebug and Zend Debugger
➢ Zend Debugger Tunneling - easier to setup, does not require Zend Server

Debug Mode
Every request to server triggers a new debug session in IDE
Useful for debugging requests from mobile apps
Available only for Zend Debugger in Zend Server

Thank you!
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Follow me: @kaloyanraev

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Essential debugging php debugging techniques, tips & tricks

1. Essential Debugging PHP Debugging techniques, tips & tricks Kaloyan Raev Zend / Rogue Wave

2. $ whoami Zend Studio Team Lead Eclipse Committer Live in Sofia, Bulgaria Skier

3. Why Debugging? Because we make bugs Because we want to fix them!

4. Debugging in PHP 101 echo $myvar; var_dump ( $myvar ); die ( "Unexpected value in myvar: $myvar" ); error_reporting ( E_ALL );

5. Better Way? Use a debugger!

6. Breakpoints $left == 10

7. Stack Traces

8. Variables Overview

9. Fine Execution Control

10. Changes in Last Step

11. In-Editor Inspections Shift + Ctrl + I

12. Watched Expressions

13. Multiple Sessions

14. PHP Debugger Engines Xdebug Zend Debugger phpdbg

15. Xdebug Zend Debugger phpdbg Built-in PHP ✅ Communication protocol DBGp XML-based binary PHP-specific own XML-based Available in PHP 7 (as of today) ✅ IDE Support ✅ ✅ Remote Debugging ✅ ✅ ✅ Profiling ✅ ✅

16. The Easiest Way for Setting Up PHP with Debugger Out of the box! v8.5 provides both Xdebug and Zend Debugger

18. Docker Containers tommylau/xdebug - Apache + PHP + Xdebug Tutorial: Debugging PHP Web Apps in a Docker Container

19. Just CLI Scripts Zend Studio bundles PHP binaries with Zend Debugger included

20. No IDEs Please phpdbg is for you Built-in PHP since 5.6 as SAPI module CLI user interface

21. Do It Yourself Stack Instructions for Zend Debugger Instructions for Xdebug Instructions for phpdbg

22. Browser Toolbars Xdebug Zend Debugger Browser Toolbar Debug Engine IDE 1. R equest w ith debug cookie 1. Request broadcast port 2.O pen debug session 4.O pen debug session 2. Response with debug info 3. R equest

23. Xdebug Toolbars Chrome ➢ Xdebug helper ➢ Xdebug enabler Firefox ➢ The easiest Xdebug ➢ easy Xdebug Opera ➢ Xdebug ➢ Xdebug launcher Safari ➢ Xdebug Toggler

24. Zend Debugger Toolbars Chrome ➢ zDebug Firefox ➢ Zend Firefox Toolbar Internet Explorer ➢ Zend Internet Explorer Toolbar

25. Z-Ray

26. Z-Ray Live!

28. Remote Debugging Intranet Direct Internet Connection Firewall / Proxy ➢ SSH Tunneling - works for both Xdebug and Zend Debugger ➢ Zend Debugger Tunneling - easier to setup, does not require Zend Server

29. Debug Mode Every request to server triggers a new debug session in IDE Useful for debugging requests from mobile apps Available only for Zend Debugger in Zend Server

30. Thank you! Rate this talk: https://joind.in/15612 Follow me: @kaloyanraev

Essential debugging php debugging techniques, tips & tricks

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